Buy wisely
Buy wiselyBuy wisely
For RetailersFor developers
  1. Home
Buy wisely

BuyWisely is your one stop price comparison platform, delivering the best deals from over 20,000 online shops. We empower shoppers to make smart, cost-effective choices by offering transparent pricing, price history, and the latest deals across a broad range of products. With BuyWisely, your money goes further.

Popular Shops
JB Hi-Fi
The Good Guys
Harvey Norman
Appliances Online
Bing Lee
Kogan
Amazon
Officeworks
Contact Us
[email protected]
Affiliate Disclosure
Legal Information
Privacy Policy
Logos provided by Logo.dev
© 2026 BuyWisely•Price data powered by pricesAPI.io•Retailers: SellWisely.io
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)
Rain-X Washer Fluid Additive 500ml (RX11806D)

Rain-X Washer Fluid Additive 500ml (RX11806D)

$19.99

(471 reviews)

Rain-X Windscreen Washer Fluid Additive, available at The Grit, offers a simple and effective way to enhance driving visibility and safety. This 500-millilitre bottle contains a concentrated additive that, when added to your vehicle's windscreen washer reservoir, applies Rain-X's water-beading technology directly to the glass. This technology creates a hydrophobic coating that causes water to bead up and roll off, dramatically improving visibility in wet weather conditions. This additive is not only effective at repelling rain but will also improve your windscreen cleaning power. This is because the Rain-x additive leaves a smooth layer on top of the windscreen, removing surface imperfections. This additive also helps increase your driving safety and comfort. It is compatible with all standard windscreen washer fluids, making it a convenient addition to your regular vehicle maintenance routine. Simply add the recommended amount to your washer reservoir along with your usual washer fluid to enjoy improved clarity and easier cleaning, regardless of the weather.

Rain-X Windscreen Washer Fluid Additive, available at The Grit, offers a simple and effective way to enhance driving visibility and safety. This 500-millilitre bottle contains a concentrated additive that, when added to your vehicle's windscreen washer reservoir, applies Rain-X's water-beading technology directly to the glass. This technology creates a hydrophobic coating that causes water to bead up and roll off, dramatically improving visibility in wet weather conditions. This additive is not only effective at repelling rain but will also improve your windscreen cleaning power. This is because the Rain-x additive leaves a smooth layer on top of the windscreen, removing surface imperfections. This additive also helps increase your driving safety and comfort. It is compatible with all standard windscreen washer fluids, making it a convenient addition to your regular vehicle maintenance routine. Simply add the recommended amount to your washer reservoir along with your usual washer fluid to enjoy improved clarity and easier cleaning, regardless of the weather.

Rain-X Washer Fluid Additive 500ml (RX11806D)

(471 reviews)

Rain-X Windscreen Washer Fluid Additive, available at The Grit, offers a simple and effective way to enhance driving visibility and safety. This 500-millilitre bottle contains a concentrated additive that, when added to your vehicle's windscreen washer reservoir, applies Rain-X's water-beading technology directly to the glass. This technology creates a hydrophobic coating that causes water to bead up and roll off, dramatically improving visibility in wet weather conditions. This additive is not only effective at repelling rain but will also improve your windscreen cleaning power. This is because the Rain-x additive leaves a smooth layer on top of the windscreen, removing surface imperfections. This additive also helps increase your driving safety and comfort. It is compatible with all standard windscreen washer fluids, making it a convenient addition to your regular vehicle maintenance routine. Simply add the recommended amount to your washer reservoir along with your usual washer fluid to enjoy improved clarity and easier cleaning, regardless of the weather.

Rain-X Windscreen Washer Fluid Additive, available at The Grit, offers a simple and effective way to enhance driving visibility and safety. This 500-millilitre bottle contains a concentrated additive that, when added to your vehicle's windscreen washer reservoir, applies Rain-X's water-beading technology directly to the glass. This technology creates a hydrophobic coating that causes water to bead up and roll off, dramatically improving visibility in wet weather conditions. This additive is not only effective at repelling rain but will also improve your windscreen cleaning power. This is because the Rain-x additive leaves a smooth layer on top of the windscreen, removing surface imperfections. This additive also helps increase your driving safety and comfort. It is compatible with all standard windscreen washer fluids, making it a convenient addition to your regular vehicle maintenance routine. Simply add the recommended amount to your washer reservoir along with your usual washer fluid to enjoy improved clarity and easier cleaning, regardless of the weather.

$19.99 - $38.95

in 29 offers

The lowest price for Rain-X Washer Fluid Additive 500ml (RX11806D) right now is $19.99 at AutoMegaStore, compared across 22 retailers.

The all-time low was $7.99 on 6 Mar 2026 — today's price is 150% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 9 June 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 09/06/2026 20:37:56

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

$19.99

Rain-X Washer Fluid Additive 500ml

Delivery $13.93

Micks Gone Bush

$21.00

Rain-X Washer Fluid Additive 500ml RX11806D

Snapklik AU

$21.30

Rain-X RX11806D Washer Fluid Additive-16.9 Fl. Oz, 500. Ml

Delivery $28.43

Marine-Deals.com.au

$21.99

Rain-X Windshield Washer Fluid Additive 500ml

Delivery between 12–17 June $13.99

Rolan Australia

$22.17

Rain-X Washer Fluid Additive 500ml (RX11806D)

Delivery between 17–19 June $8.80

Automotive Superstore

$22.87

Rain-X Washer Fluid Additive 500ml RX11806D

Delivery between 10–22 June $10.95

Ubuy

$23.23

Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml

Free delivery between 16–20 June

adventureindustries.com.au

$23.35

Rain-X Rain-X Windscreen Washer Fluid Additive 500ML Treats 15L

Delivery between 17–20 June $9.70

Industrial Shed

$23.89

Rain-X - Washer Fluid Additive 500ml | RX11806D

Delivery between 10–18 June $7.95

desertcart.com.au

$24.50

Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml

Delivery between 16–19 June $29

Price history

Price history

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

Reviews

7 April 2024

originally posted on lazada.com.my

Received product with proper seal applied. No leakage found. Free gift was a disappointment though. The cloth material is rough and not suitable for washing car. Makes a good rag cloth to wipe other things though.The wiper fluid though is genuine and in this rainy season it works as advertised. Wipers now don't make any annyoing sound.

30 September 2024Steve

originally posted on walmart.com

I followed the instructions for this product, but after using it, I've got a spotty mess to clean up on my non-wiped windshield area, and my whole roof (including my moon roof glass). Possibly the user needs to clean the vehicle first, and then do a Rain-X treatment on the vehicle's windshield and roof BEFORE using this additive in the washer fluid. However, the instructions don't mention this preparation at all.

If I could I would give no stars.
29 March 2024TCS

originally posted on supercheapauto.com.au

Bought this product because I had bought other Rain-x product in the past and they had worked well, this product on the other hand is terrible. Followed the instructions and now I’ve spent the last couple of weeks flushing it out of the system and what’s worst is that the rear washer is clogged up by the biofilm that grew. It left a greasy film on the windscreen that I had to use other products to wash it off.

Specification

Item formSpray
ScentUnscented
Specific uses for productWindshield
Material featureSpray
Product dimensions18 x 17.8 x 24.1 cm; 8.5 Grams

Price comparison

Updated about 13 hours ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
AutoMegaStore

$19.99

Rain-X Washer Fluid Additive 500ml

Delivery $13.93

Micks Gone Bush

$21.00

Rain-X Washer Fluid Additive 500ml RX11806D

Snapklik AU

$21.30

Rain-X RX11806D Washer Fluid Additive-16.9 Fl. Oz, 500. Ml

Delivery $28.43

Marine-Deals.com.au

$21.99

Rain-X Windshield Washer Fluid Additive 500ml

Delivery between 12–17 June $13.99

Rolan Australia

$22.17

Rain-X Washer Fluid Additive 500ml (RX11806D)

Delivery between 17–19 June $8.80

Price history

Price history

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

Reviews

7 April 2024

Received product with proper seal applied. No leakage found. Free gift was a disappointment though. The cloth material is rough and not suitable for washing car. Makes a good rag cloth to wipe other things though.The wiper fluid though is genuine and in this rainy season it works as advertised. Wipers now don't make any annyoing sound.

originally posted on lazada.com.my
30 September 2024

I followed the instructions for this product, but after using it, I've got a spotty mess to clean up on my non-wiped windshield area, and my whole roof (including my moon roof glass). Possibly the user needs to clean the vehicle first, and then do a Rain-X treatment on the vehicle's windshield and roof BEFORE using this additive in the washer fluid. However, the instructions don't mention this preparation at all.

Steve originally posted on walmart.com
If I could I would give no stars.
29 March 2024

Bought this product because I had bought other Rain-x product in the past and they had worked well, this product on the other hand is terrible. Followed the instructions and now I’ve spent the last couple of weeks flushing it out of the system and what’s worst is that the rear washer is clogged up by the biofilm that grew. It left a greasy film on the windscreen that I had to use other products to wash it off.

TCS originally posted on supercheapauto.com.au
Rain-X products are the Bomb.
26 April 2024

Can't fault this product at getting the rain to run off the windscreen quicker than the wipers. I've had days driving in the rain where I've been able to run them on intermittent rather than full speed. Before I added this product to my washer bottle my new Kia Rio was struggling. The wipers would clear it but as soon as they'd passed it was almost impossible to see. I'd tried various other products cleaning and polishing the glass in case there was still some sort of transit film over it to no avail.

originally posted on supercheapauto.com.au
[Rewarded Review] Its OK....
1 January 2021

Seems like a good idea and alternative to the original Rain-X wipe it on, and remove it product. This does repel the rain BUT be aware of a few hiccups.When you put on your windshield washer for the first few wipes you will get a white smeary looking haze on your windshield. After a few wipes it will go away, but this can be concerning the first time you do it - especially on a dark road in the rain. Second issue is sometimes you will get some gray spots on the paint, especially on the roof. Apparently the process of repelling the water on the windshield will mean the fluid will carry any dirt to the painted areas.The spots can be removed when washing, but it does take away from the look of your car.So, it does repel water, but it has its draw backs that the ... MoreSeems like a good idea and alternative to the original Rain-X wipe it on, and remove it product. This does repel the rain BUT be aware of a few hiccups.When you put on your windshield washer for the first few wipes you will get a white smeary looking haze on your windshield. After a few wipes it will go away, but this can be concerning the first time you do it - especially on a dark road in the rain. Second issue is sometimes you will get some gray spots on the paint, especially on the roof. Apparently the process of repelling the water on the windshield will mean the fluid will carry any dirt to the painted areas.The spots can be removed when washing, but it does take away from the look of your car.So, it does repel water, but it has its draw backs that the original Rain-X doesn't have.I'll stick with the original formula....

ThrftyShopper originally posted on walmart.com
[Rewarded Review] Noticably better than regular washer fluid
31 December 2020

I am a food delivery driver and I often work when it's dark out and during winter it snows a lot. The day I received the Rain-X in the mail I immediately Put 1/3 of the bottle it my newly filled washer fluid tank. I sprayed it a few times and noticed the difference right away. My windshield had been quite dirty from a snow storm the day before that I had barely scrapped off with a gas station squeegee. These was a clear line showing where the wipers has cleaned my windshield with the Rain-X vs. the gas station squeegee around the edges that the wipers don't get. My windshield was crystal clear while the rest of my car was dirty. I continued to spray the fluid during the night while I was out driving and it continued to snow. I was able to see apartment building ... MoreI am a food delivery driver and I often work when it's dark out and during winter it snows a lot. The day I received the Rain-X in the mail I immediately Put 1/3 of the bottle it my newly filled washer fluid tank. I sprayed it a few times and noticed the difference right away. My windshield had been quite dirty from a snow storm the day before that I had barely scrapped off with a gas station squeegee. These was a clear line showing where the wipers has cleaned my windshield with the Rain-X vs. the gas station squeegee around the edges that the wipers don't get. My windshield was crystal clear while the rest of my car was dirty. I continued to spray the fluid during the night while I was out driving and it continued to snow. I was able to see apartment building numbers more easily than ever. The only thing I'm not super confident on is that the bottle says 1/3 should last with a full bottle of windshield washer fluid. I feel like I've noticed a difference and that my windshield isn't as clear the more I've used that initial 1/3 part. Maybe that's because the snow has been so heavy lately. I might try refilling or using more since it does work well, just not as long as stated maybe. Also store the bottle right side up, do not allow to lay down. Mine fell over in the truck and leaked a little. Would recommend!

CoconutSweetie originally posted on walmart.com
[Rewarded Review] Water Beads Well!
16 January 2021

This washer fluid additive works well on a rainy day. It is too bad we have not had much snow around here this winter to really put it to the test. However, after using this fluid, I noticed that the rain drops bead nicely on the windshield and fall away. The solution mixes easy with your standard washer fluid. It did not have a chemical smell to it either. I did not try it with water alone because I never use water as washer fluid for fear it will freeze in the winter. I suspect that the rain drops would still bead when using water alone but the dirt in the windshield may remain or be smeared. You only need four ounces of Rain-X per gallon of windshield fluid. One bottle of the Rain-X solution will last you approximately four treatments, which is a great deal. I ... MoreThis washer fluid additive works well on a rainy day. It is too bad we have not had much snow around here this winter to really put it to the test. However, after using this fluid, I noticed that the rain drops bead nicely on the windshield and fall away. The solution mixes easy with your standard washer fluid. It did not have a chemical smell to it either. I did not try it with water alone because I never use water as washer fluid for fear it will freeze in the winter. I suspect that the rain drops would still bead when using water alone but the dirt in the windshield may remain or be smeared. You only need four ounces of Rain-X per gallon of windshield fluid. One bottle of the Rain-X solution will last you approximately four treatments, which is a great deal. I also want to mention that I mixed the Rain-X with cheap washer fluid and it worked well so I would not spend money on expensive washer fluid. I think the Rain-X additive elevates the washer fluid. Hopefully, when we do get our first snowfall, I will find my windshield just as easy to clean.

Krys10 originally posted on walmart.com
[Rewarded Review] Working well so far in the early rainy season
30 December 2020

To be clear I love Rain-X and have been using it for years. It has aided visibility for me during drives through dreadful winter rain storms to and from work. Typically, I use the Rain-X windshield rain repellent during the winter, which by the way works great, but it gets a bit tiring having to apply it; and as I age, I am getting lazier. The Rain-X washer fluid additive is a lot easier to use. Just add four ounces to 1 gallon of windshield washer fluid, which can be any type of windshield washer fluid. You can gauge if you’ve added the right amount by looking at the level indicator on the side of the bottle. Honestly, I don’t even know if my windshield fluid tank holds a gallon. Anyway, I added the four ounces and started using it to wash the windshield. My ... MoreTo be clear I love Rain-X and have been using it for years. It has aided visibility for me during drives through dreadful winter rain storms to and from work. Typically, I use the Rain-X windshield rain repellent during the winter, which by the way works great, but it gets a bit tiring having to apply it; and as I age, I am getting lazier. The Rain-X washer fluid additive is a lot easier to use. Just add four ounces to 1 gallon of windshield washer fluid, which can be any type of windshield washer fluid. You can gauge if you’ve added the right amount by looking at the level indicator on the side of the bottle. Honestly, I don’t even know if my windshield fluid tank holds a gallon. Anyway, I added the four ounces and started using it to wash the windshield. My windshield was a bit grimy so it took a few washes to wipe the guck off. There have been a few sprinkles of rain lately and I do see the rain beading off. I am pretty confident it will continue to work well through the rainy season this winter. I also added four ounces of the Rain-X Washer Fluid Additive to my husband’s car. He did not feel it was necessary but I think he’ll be in for a pleasant surprise.

DoRDoR originally posted on walmart.com
[Rewarded Review] great product
15 January 2021

I received the Rain-x washer fluid additive. I absolutely love all Rain-x products. I have a truck with horrible windshield wipers. I poured this into the washer fluid and it made an incredible difference in the clarity of the windshield while it was in the rain. Not long after I added the fluid, my windshield wipers stopped working completely. I had the fluid additive in the washer tank and I coated the windshield with the regular Rain-x and I was able to drive through the one of the worst rainstorms with no worries about my wipers working at all. The rain just glided right off the windshield in big droplets. Its more effective the faster you go. The droplets are big so clarity is still good but the wind hitting them helps roll them right off the windshield. It was ... MoreI received the Rain-x washer fluid additive. I absolutely love all Rain-x products. I have a truck with horrible windshield wipers. I poured this into the washer fluid and it made an incredible difference in the clarity of the windshield while it was in the rain. Not long after I added the fluid, my windshield wipers stopped working completely. I had the fluid additive in the washer tank and I coated the windshield with the regular Rain-x and I was able to drive through the one of the worst rainstorms with no worries about my wipers working at all. The rain just glided right off the windshield in big droplets. Its more effective the faster you go. The droplets are big so clarity is still good but the wind hitting them helps roll them right off the windshield. It was very easy to add to my washer fluid. Just pour it in (4f; oz per gallon ) and then use your inside controls to spray it on the windshield when needed. This has also helped clean the grime, bugs and other tough and hard to remove gross stuff off my windshield. It pretty much is a multi purpose tool that does the hard work for you

Kris originally posted on walmart.com

Specification

Item formSpray
ScentUnscented
Specific uses for productWindshield
Material featureSpray
Product dimensions18 x 17.8 x 24.1 cm; 8.5 Grams

You may also like

Rain-X Washer Kit
Rain-X Washer Kit$47.99
2
From AutoMegaStore
Aquadent Fr3sh Dental Water Additive 500ml
Aquadent Fr3sh Dental Water Additive 500ml$25.99 - $81.95
173
Compare 19 offers