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Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Flex Seal Spray Rubber Sealant Coating, 14-oz, Black

Flex Seal Spray Rubber Sealant Coating, 14-oz, Black

$13.99

(5,657 reviews)

Liquid rubber in a spray can - instantly seeps into cracks and holes stopping the toughest leaksCan be used on wet or dry surfaces - won't sag or drip in the summer heat Works on wood, metal, glass, tile, concrete, plastic, rubber, drywall, masonry and so much more! Perfect for roof and gutter repair, sealing leaks cracks and holes, furniture repair, weatherise your home, pool repairs, auto and boat repairs, bathroom fixes and more! Helps protect surfaces from corrosionFLEX SEAL is liquid rubber in a spray can that sprays out as liquid and dries into a strong, watertight, flexible rubberised coating. Just a quick shot and FLEX SEAL instantly seeps into cracks and holes, stopping the toughest leaks. FLEX SEAL can be used on a variety of surfaces. Plus it can be applied on wet or dry surfaces and will last for years without cracking, peeling or losing any of its strength or sealing properties. FLEX SEAL is unaffected by weather. In extreme heat or the cold FLEX SEAL will always keep its hold. FLEX SEAL is the easy way to coat, seal, protect and stop leaks fast and is perfect for all your home repairs.

Liquid rubber in a spray can - instantly seeps into cracks and holes stopping the toughest leaksCan be used on wet or dry surfaces - won't sag or drip in the summer heat Works on wood, metal, glass, tile, concrete, plastic, rubber, drywall, masonry and so much more! Perfect for roof and gutter repair, sealing leaks cracks and holes, furniture repair, weatherise your home, pool repairs, auto and boat repairs, bathroom fixes and more! Helps protect surfaces from corrosionFLEX SEAL is liquid rubber in a spray can that sprays out as liquid and dries into a strong, watertight, flexible rubberised coating. Just a quick shot and FLEX SEAL instantly seeps into cracks and holes, stopping the toughest leaks. FLEX SEAL can be used on a variety of surfaces. Plus it can be applied on wet or dry surfaces and will last for years without cracking, peeling or losing any of its strength or sealing properties. FLEX SEAL is unaffected by weather. In extreme heat or the cold FLEX SEAL will always keep its hold. FLEX SEAL is the easy way to coat, seal, protect and stop leaks fast and is perfect for all your home repairs.

Flex Seal Spray Rubber Sealant Coating, 14-oz, Black

(5,657 reviews)

Liquid rubber in a spray can - instantly seeps into cracks and holes stopping the toughest leaksCan be used on wet or dry surfaces - won't sag or drip in the summer heat Works on wood, metal, glass, tile, concrete, plastic, rubber, drywall, masonry and so much more! Perfect for roof and gutter repair, sealing leaks cracks and holes, furniture repair, weatherise your home, pool repairs, auto and boat repairs, bathroom fixes and more! Helps protect surfaces from corrosionFLEX SEAL is liquid rubber in a spray can that sprays out as liquid and dries into a strong, watertight, flexible rubberised coating. Just a quick shot and FLEX SEAL instantly seeps into cracks and holes, stopping the toughest leaks. FLEX SEAL can be used on a variety of surfaces. Plus it can be applied on wet or dry surfaces and will last for years without cracking, peeling or losing any of its strength or sealing properties. FLEX SEAL is unaffected by weather. In extreme heat or the cold FLEX SEAL will always keep its hold. FLEX SEAL is the easy way to coat, seal, protect and stop leaks fast and is perfect for all your home repairs.

Liquid rubber in a spray can - instantly seeps into cracks and holes stopping the toughest leaksCan be used on wet or dry surfaces - won't sag or drip in the summer heat Works on wood, metal, glass, tile, concrete, plastic, rubber, drywall, masonry and so much more! Perfect for roof and gutter repair, sealing leaks cracks and holes, furniture repair, weatherise your home, pool repairs, auto and boat repairs, bathroom fixes and more! Helps protect surfaces from corrosionFLEX SEAL is liquid rubber in a spray can that sprays out as liquid and dries into a strong, watertight, flexible rubberised coating. Just a quick shot and FLEX SEAL instantly seeps into cracks and holes, stopping the toughest leaks. FLEX SEAL can be used on a variety of surfaces. Plus it can be applied on wet or dry surfaces and will last for years without cracking, peeling or losing any of its strength or sealing properties. FLEX SEAL is unaffected by weather. In extreme heat or the cold FLEX SEAL will always keep its hold. FLEX SEAL is the easy way to coat, seal, protect and stop leaks fast and is perfect for all your home repairs.

$13.99 - $65.00

in 26 offers

The lowest price for Flex Seal Spray Rubber Sealant Coating, 14-oz, Black right now is $13.99 at Anaconda, compared across 14 retailers.

The all-time low was $13.99 on 17 Sept 2026. That's the lowest price we've ever tracked — a great time to buy.

Prices last updated 17 Sept 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 17/09/2026 00:36:10

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=amazon.com.au&sz=64Amazon.com.au

$34.95

Flex Seal 14 oz Black Stop Leaks Instantly Waterproof Rubber Spray Sealant

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=anacondastores.com&sz=64Anaconda

$13.99

Flex Mini Seal Black

Free 28-day returns

https://www.google.com/s2/favicons?domain=anacondastores.com&sz=64Anaconda

$31.49

Flex Seal Black

Free 28-day returns

https://www.google.com/s2/favicons?domain=housetradesupplies.com.au&sz=64housetradesupplies

$21.90

Flex Seal Mini Black 57G FSEALMIB

Delivery between 21–25 Sept $12.90

https://www.google.com/s2/favicons?domain=housetradesupplies.com.au&sz=64housetradesupplies

$39.90

FLEX SEAL Spray Liquid Rubber BLACK 14oz 396gm FSR20

Delivery between 21–25 Sept $12.90

https://www.google.com/s2/favicons?domain=desertcart.com.au&sz=64desertcart.com.au

$30.60

Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 2 oz, 1-Pack

Delivery between 23–26 Sept $29

https://www.google.com/s2/favicons?domain=harrisscarfe.com.au&sz=64Harris Scarfe

$31.96

As Seen On TV Flex Seal 396g Spray Can Black

28-day returns

https://www.google.com/s2/favicons?domain=harveynorman.com.au&sz=64Harvey Norman

$39.95

Flex Seal - Black

Delivery $10

https://www.google.com/s2/favicons?domain=kmart.com.au&sz=64Kmart

$39.95

Flex Seal Waterproof Rubber Spray Sealant, Stop Leaks Instantly - Black

Delivery between 22–25 Sept $9.95

https://www.google.com/s2/favicons?domain=bigw.com.au&sz=64BIG W

$39.95

As Seen On TV Flex Seal Spray - Black

Free same-day delivery

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

16 August 2021

originally posted on Rural King

Very happy with the product. I does spray out a bit thick and textured, but that was ok in my application. If you want something to appear smooth afterwards, not sure you can achive it with this. That said, you may not get the desired effects from a "thinner" sprayed mixure. In order to finish a project, I bought a name brand simular product, which came out a bit thinner. Only took about two weeks to see it wasnt as high a quality. Impressed me so much, I have been spreading the word of my experiance, and bought 4 more cans to keep on the shelf for an upcoming project.

A bit messy and smelly.
30 November 2019DocFood

originally posted on flexsealproducts.com

I was eager to receive this product because I have various areas outside/inside the home I want to seal. I've never used a product l like this so I decided to use it as a test.The spray can application at first seemed like a better idea, but after seeing it in action, I was disappointed. The spray zone was wider than I anticipated which lead to an overspray onto areas I didn't want covered.The consistency was about what I imagined because it's basically liquid rubber that ends up a chunky spray that kind of smooths after drying.The color was exactly as described and the product does seal and prevent water from penetrating after fully drying. I believe it took longer to dry because it's winter weather right now. I feel applying this product during a better ... MoreI was eager to receive this product because I have various areas outside/inside the home I want to seal. I've never used a product l like this so I decided to use it as a test.The spray can application at first seemed like a better idea, but after seeing it in action, I was disappointed. The spray zone was wider than I anticipated which lead to an overspray onto areas I didn't want covered.The consistency was about what I imagined because it's basically liquid rubber that ends up a chunky spray that kind of smooths after drying.The color was exactly as described and the product does seal and prevent water from penetrating after fully drying. I believe it took longer to dry because it's winter weather right now. I feel applying this product during a better season would have better results overall.The worst thing about this product is the odor. I read the instructions and paid attention to where I was spraying making sure to have good ventilation, but even though I used it outdoors, I could still smell it coming into the home. It's has a very strong odor and doesn't fade as quick as I would have l liked. It almost reminded me of the smell of gasoline.The clean up was more difficult than I had hoped. I tried scrubbing it off areas of my hands that got covered from scrubbing the areas of the house that the overspray came into contact with. I had to use a heavy duty hand scrub just to remove to small spots on my hand and still have find something to remove it from the areas of my home I didn't want sprayed.Overall it's a good product that does what it is supposed to do, but there are certainly drawbacks and a bit of a learning curve. Better weather and more personal trial and error could have made this experience excellent.

Flex Seal Spray worked like a charm!
22 November 2019TheWei

originally posted on flexsealproducts.com

The Flex Seal liquid rubber sealant really does live up to its name! I used the Flex Seal on a damaged black vinyl downspout by applying layers to create a nice water tight seal where there was a cut along the extension connection point.This worked out great in my case because my Flex Seal is black which just blended in with my black vinyl downspout. I applied about five coats to get a nice water tight seal which looked seamless! When starting off, I found that applying little goes a long way especially because the damage I was repairing was just a cut/slit across the vinyl.As indicated on the can, definitely need to use the spray in a well ventilated space and/or outside. Certainly not the most pleasant smell, but I would expect nothing less; would recommend ... MoreThe Flex Seal liquid rubber sealant really does live up to its name! I used the Flex Seal on a damaged black vinyl downspout by applying layers to create a nice water tight seal where there was a cut along the extension connection point.This worked out great in my case because my Flex Seal is black which just blended in with my black vinyl downspout. I applied about five coats to get a nice water tight seal which looked seamless! When starting off, I found that applying little goes a long way especially because the damage I was repairing was just a cut/slit across the vinyl.As indicated on the can, definitely need to use the spray in a well ventilated space and/or outside. Certainly not the most pleasant smell, but I would expect nothing less; would recommend using a mask if you don’t want to inhale any fumes.I was impressed with how well this worked on vinyl as it bonded well against the material. I can foresee multiple applications that the Flex Seal spray can be used for and look forward to using this on other applications around the house. This is certainly a great item to have around the house not only for crafts but also for emergencies to fix any leaks.

Specification

Product dimensions10.67 x 8.89 x 8.89 cm; 396.89 Grams
Is Discontinued By ManufacturerNo

Price comparison

Updated 2 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=amazon.com.au&sz=64
Amazon.com.au

$34.95

Flex Seal 14 oz Black Stop Leaks Instantly Waterproof Rubber Spray Sealant

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=anacondastores.com&sz=64
Anaconda

$13.99

Out of stock

Flex Mini Seal Black

Free 28-day returns

https://www.google.com/s2/favicons?domain=anacondastores.com&sz=64
Anaconda

$31.49

Out of stock

Flex Seal Black

Free 28-day returns

https://www.google.com/s2/favicons?domain=housetradesupplies.com.au&sz=64
housetradesupplies

$21.90

Flex Seal Mini Black 57G FSEALMIB

Delivery between 21–25 Sept $12.90

https://www.google.com/s2/favicons?domain=housetradesupplies.com.au&sz=64
housetradesupplies

$39.90

FLEX SEAL Spray Liquid Rubber BLACK 14oz 396gm FSR20

Delivery between 21–25 Sept $12.90

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

16 August 2021

Very happy with the product. I does spray out a bit thick and textured, but that was ok in my application. If you want something to appear smooth afterwards, not sure you can achive it with this. That said, you may not get the desired effects from a "thinner" sprayed mixure. In order to finish a project, I bought a name brand simular product, which came out a bit thinner. Only took about two weeks to see it wasnt as high a quality. Impressed me so much, I have been spreading the word of my experiance, and bought 4 more cans to keep on the shelf for an upcoming project.

originally posted on Rural King
A bit messy and smelly.
30 November 2019

I was eager to receive this product because I have various areas outside/inside the home I want to seal. I've never used a product l like this so I decided to use it as a test.The spray can application at first seemed like a better idea, but after seeing it in action, I was disappointed. The spray zone was wider than I anticipated which lead to an overspray onto areas I didn't want covered.The consistency was about what I imagined because it's basically liquid rubber that ends up a chunky spray that kind of smooths after drying.The color was exactly as described and the product does seal and prevent water from penetrating after fully drying. I believe it took longer to dry because it's winter weather right now. I feel applying this product during a better ... MoreI was eager to receive this product because I have various areas outside/inside the home I want to seal. I've never used a product l like this so I decided to use it as a test.The spray can application at first seemed like a better idea, but after seeing it in action, I was disappointed. The spray zone was wider than I anticipated which lead to an overspray onto areas I didn't want covered.The consistency was about what I imagined because it's basically liquid rubber that ends up a chunky spray that kind of smooths after drying.The color was exactly as described and the product does seal and prevent water from penetrating after fully drying. I believe it took longer to dry because it's winter weather right now. I feel applying this product during a better season would have better results overall.The worst thing about this product is the odor. I read the instructions and paid attention to where I was spraying making sure to have good ventilation, but even though I used it outdoors, I could still smell it coming into the home. It's has a very strong odor and doesn't fade as quick as I would have l liked. It almost reminded me of the smell of gasoline.The clean up was more difficult than I had hoped. I tried scrubbing it off areas of my hands that got covered from scrubbing the areas of the house that the overspray came into contact with. I had to use a heavy duty hand scrub just to remove to small spots on my hand and still have find something to remove it from the areas of my home I didn't want sprayed.Overall it's a good product that does what it is supposed to do, but there are certainly drawbacks and a bit of a learning curve. Better weather and more personal trial and error could have made this experience excellent.

DocFood originally posted on flexsealproducts.com
Flex Seal Spray worked like a charm!
22 November 2019

The Flex Seal liquid rubber sealant really does live up to its name! I used the Flex Seal on a damaged black vinyl downspout by applying layers to create a nice water tight seal where there was a cut along the extension connection point.This worked out great in my case because my Flex Seal is black which just blended in with my black vinyl downspout. I applied about five coats to get a nice water tight seal which looked seamless! When starting off, I found that applying little goes a long way especially because the damage I was repairing was just a cut/slit across the vinyl.As indicated on the can, definitely need to use the spray in a well ventilated space and/or outside. Certainly not the most pleasant smell, but I would expect nothing less; would recommend ... MoreThe Flex Seal liquid rubber sealant really does live up to its name! I used the Flex Seal on a damaged black vinyl downspout by applying layers to create a nice water tight seal where there was a cut along the extension connection point.This worked out great in my case because my Flex Seal is black which just blended in with my black vinyl downspout. I applied about five coats to get a nice water tight seal which looked seamless! When starting off, I found that applying little goes a long way especially because the damage I was repairing was just a cut/slit across the vinyl.As indicated on the can, definitely need to use the spray in a well ventilated space and/or outside. Certainly not the most pleasant smell, but I would expect nothing less; would recommend using a mask if you don’t want to inhale any fumes.I was impressed with how well this worked on vinyl as it bonded well against the material. I can foresee multiple applications that the Flex Seal spray can be used for and look forward to using this on other applications around the house. This is certainly a great item to have around the house not only for crafts but also for emergencies to fix any leaks.

TheWei originally posted on flexsealproducts.com
Good product on the right project
4 May 2021

There is nothing wrong with this product, you just cannot expect it to do what it does not do. This company also sells a waterproofing tape that is double the price for a fraction of what you would think it would cover. Since our project was irregularly shaped, we went with the spray, and ended up going back two or three times to buy more. It is picky about gaps, looking at first like it was occluding them, but not getting quite thick enough to become waterproof. I think the tape would have done fine, and saved us lots of time and money. Good: sticks to EVERYTHING, a nice plus if your waterproofing involves two different items, like wood and metal. Also good: the spray will go into places that would not be accessible otherwise. We should have bought 5 rolls of tape ... MoreThere is nothing wrong with this product, you just cannot expect it to do what it does not do. This company also sells a waterproofing tape that is double the price for a fraction of what you would think it would cover. Since our project was irregularly shaped, we went with the spray, and ended up going back two or three times to buy more. It is picky about gaps, looking at first like it was occluding them, but not getting quite thick enough to become waterproof. I think the tape would have done fine, and saved us lots of time and money. Good: sticks to EVERYTHING, a nice plus if your waterproofing involves two different items, like wood and metal. Also good: the spray will go into places that would not be accessible otherwise. We should have bought 5 rolls of tape and one can of spray. We also should have designed our project better from the start....in the end this product allowed us to survive our poor planning. I think a better set of instructions and expectations on the can would allow people like me to make better choices.

PDJD originally posted on lowes.com
Great for fixing small cracks
23 November 2019

This past summer my favorite cooler had gotten cracked. I have had this cooler forever and couldn’t part with it. I figured this would be a good project for the Flex Seal. I did have to use more than two coats because the crack was very large. Flex Seal is extremely easy to use and has a nice, even spray. After a couple of coats, I could see the crack had been filled and I needed to have it dry. It’s extremely cold here right now so I have no use for my cooler at this moment but I still wanted to see how this product can hold up. I filled the cooler up with ice and left it over night. No leaking of any kind! I was very impressed. This summer I plan on using my cooler often and I feel like this product will get my cooler through another year.The only reason why I ... MoreThis past summer my favorite cooler had gotten cracked. I have had this cooler forever and couldn’t part with it. I figured this would be a good project for the Flex Seal. I did have to use more than two coats because the crack was very large. Flex Seal is extremely easy to use and has a nice, even spray. After a couple of coats, I could see the crack had been filled and I needed to have it dry. It’s extremely cold here right now so I have no use for my cooler at this moment but I still wanted to see how this product can hold up. I filled the cooler up with ice and left it over night. No leaking of any kind! I was very impressed. This summer I plan on using my cooler often and I feel like this product will get my cooler through another year.The only reason why I am giving this product one less star is because I feel I had to do more than two coats. On the bottle it suggests two but I felt it needed several more. This was a smaller crack and maybe the way it was angled left me needling to add more so it could be different for every project.The best part about Flex Seal is that it’s a great price and easy to use. They’ve made this product consumer friendly. I do strongly suggest using outside because there is a strong odor. The smell does not linger and goes away quickly but it’s best done outside. I have a few projects around my home that I would also like to use Flex Seal on. It’s great that there are different colors!Overall, I was very impressed and plan on using on several other project around the house. Great product!

JoeFav originally posted on flexsealproducts.com
Great for plugging leaks
3 December 2019

I have seen this on the market and have wanted to try it since I seen what all projects you can use this spray seal for. I am easily a fan since the first time I used this, which was on my front porch with a small leak I was having near the top of the screen door. The rubber piece was missing from the screen door which was causing water to flow right through and get the floor all wet below. I took the spray and looked at the instructions which were easy to follow and I sprayed it onto the door surface and the cracked rubber area. I thought it would be messy to apply, but it is an absolute breeze when it comes to the spraying and application process. It goes on evenly and consistently and covers the area really well with no patchiness which is the best part. It ... MoreI have seen this on the market and have wanted to try it since I seen what all projects you can use this spray seal for. I am easily a fan since the first time I used this, which was on my front porch with a small leak I was having near the top of the screen door. The rubber piece was missing from the screen door which was causing water to flow right through and get the floor all wet below. I took the spray and looked at the instructions which were easy to follow and I sprayed it onto the door surface and the cracked rubber area. I thought it would be messy to apply, but it is an absolute breeze when it comes to the spraying and application process. It goes on evenly and consistently and covers the area really well with no patchiness which is the best part. It creates an even tight seal which is great, because now my door is no longer leaking since this has fixed the leaking issue I was having. I also used this around my sheds windows as parts were starting to become dry and break away, and this filled the cracks and sealed up the exposed areas. This spray works quickly and really provides a great seal, which I have used other brands and have not got the same results. I am a very happy user of this spray and keep it on hand for all projects around the house that need a seal, or holes that need to be filled. This stuff is waterproof and has held up very well against the rain and the snow and I anticipate it to continue working just as well. I recommend this to anyone who needs a handy spray to help fix every day household issues and more.

biggie originally posted on flexsealproducts.com
Wide variety of applications
20 November 2019

I was looking for a product that would seal the spaces where my outside water lines enter my camper to help with insulation and weather proofing. The area was not huge but just enough to allow cold air to seep in and I did not want to take any chances as temperatures frequently dip into single digits.I found the flex seal worked well in this application. It was easy to administer the appropriate amount for the area I was working on. The product comes in an aerosol can with a standard push button spray nozzle. I would have liked the product to come with a connecting straw which would help get into smaller cracks. As it is there's little control on how much of an area is sprayed due to the nozzle.Overall the Flex Seal worked nicely. It is dispensed in liquid form ... MoreI was looking for a product that would seal the spaces where my outside water lines enter my camper to help with insulation and weather proofing. The area was not huge but just enough to allow cold air to seep in and I did not want to take any chances as temperatures frequently dip into single digits.I found the flex seal worked well in this application. It was easy to administer the appropriate amount for the area I was working on. The product comes in an aerosol can with a standard push button spray nozzle. I would have liked the product to come with a connecting straw which would help get into smaller cracks. As it is there's little control on how much of an area is sprayed due to the nozzle.Overall the Flex Seal worked nicely. It is dispensed in liquid form which helps it get into the nooks and crannies and then dries into a rubber-like consistency. I had to do a couple of applications to build the product up and waited 24 hours before coating. The can recommends 24 to 48 hours between. I found the seal to be fully cured about 48 hours after applying. The instructions also state the dried seal can be painted over, but I selected the black color which matched the hole protectors in my RV; therefore, I did not need to paint.

dan65441 originally posted on flexsealproducts.com
Works for what I needed
1 November 2022

I bought this product to spray-seal the roof of an outdoor cat house I built. It sprays fairly well and covers easily. It basically rubberized and waterproofed the roof. Water does bead up on the surface and it doesn't peel off easily. Even though the can is large you really only get enough to cover a 10 sq. ft. surface if you're spraying plywood or OSB. No idea how it is on metal or for waterproofing metal as I haven't tried that.

Fat Guy Workin originally posted on lowes.com
Works on some applications, but not cost effective
15 November 2019

This product can work. It's most effective if you spray it on the intended area in three separate coats, allowing each coat to dry 2-3 hours before the next. Then, allow to sit for 24 hours.Out of all the uses, I can confirm it does fairly well on small holes in gutters, hoses of various kinds(not hoses that will experience high heat), and some roof applications.This stuff is NOT a permanent solution.With that said, the issue I have with this is twofold:1. It's not really cost effective. I'm not going to name other products since this is a review, but there are many other solutions that are cheaper and will yield similar results. In fact, there's an automotive based product that's nearly identical to this but 1/3 of the price.2. It's not immediate. ... MoreThis product can work. It's most effective if you spray it on the intended area in three separate coats, allowing each coat to dry 2-3 hours before the next. Then, allow to sit for 24 hours.Out of all the uses, I can confirm it does fairly well on small holes in gutters, hoses of various kinds(not hoses that will experience high heat), and some roof applications.This stuff is NOT a permanent solution.With that said, the issue I have with this is twofold:1. It's not really cost effective. I'm not going to name other products since this is a review, but there are many other solutions that are cheaper and will yield similar results. In fact, there's an automotive based product that's nearly identical to this but 1/3 of the price.2. It's not immediate. Theoretically, you'd use this in an emergency. Well, in an emergency, you'll need faster results than 24 hours.In sum, if you use three coats and follow drying/cure times, yes, this can and does work for shorterm fixes. However, it's not a true emergency solution and it's far more expensive than a few other products that will accomplish similar results.So, I can recommend it because I've confirmed it works, but I'd suggest you seek other options unless this is on sale.3 starsCheers!

Em_525 originally posted on flexsealproducts.com
pricey water leak sealer
20 November 2020

Comparatively expensive! You could probably buy multiple real fishing boats with the flex seal it took for the boat as in the tv ads. It took multiple coats. I've never seen any statistics on how long this stuff lasts or how effectively it seals. So, I won't know how long it may be before leaks again become a problem. A straw to direct the paint would have helped. Be careful using it inside without adequate ventilation. At least open windows or doors or run and/or run you HVAC fan for a while. I used a flex-seal spray can to help seal around pipes coming through the concrete slab from the unit above, after first sealing with cement and caulking. Important: Don't forget to turn the can upside down and spray enough to clear the nozzle when you are finished. Cover ... MoreComparatively expensive! You could probably buy multiple real fishing boats with the flex seal it took for the boat as in the tv ads. It took multiple coats. I've never seen any statistics on how long this stuff lasts or how effectively it seals. So, I won't know how long it may be before leaks again become a problem. A straw to direct the paint would have helped. Be careful using it inside without adequate ventilation. At least open windows or doors or run and/or run you HVAC fan for a while. I used a flex-seal spray can to help seal around pipes coming through the concrete slab from the unit above, after first sealing with cement and caulking. Important: Don't forget to turn the can upside down and spray enough to clear the nozzle when you are finished. Cover surrounding areas before spraying. Use goggles, a mask and gloves. Don't breath any more of the fumes than you have to. No open flames or sparks where the vapors may collect. Water cleanup is insufficient. Use paint thinner or similar product.In a few years I may be able to give it 5 stars.

lifeisadimension originally posted on lowes.com

Specification

Product dimensions10.67 x 8.89 x 8.89 cm; 396.89 Grams
Is Discontinued By ManufacturerNo