Bostik OB1 Hybrid Sealant & Adhesive has a user-friendly, hybrid polymer formulation. An alternative to mastics, wood and PU adhesives, silicones, acrylics and butyl rubber sealants. Contains no solvents so will never crack or shrink. Can be applied on wet surfaces, painted or moulded. Very high bond strength with resistance to fungal and bacterial growth. This Bostik OB1 Hybrid Sealant & Adhesive, Clear 290ml, has a user-friendly, hybrid polymer formulation. An alternative to mastics, wood and PU adhesives, silicones, acrylics and butyl rubber sealants. Containing no solvents so will never crack or shrink and can be applied on wet surfaces, painted or moulded. This Bostik product has very high bond strength with resistance to fungal and bacterial growth.