Flex Paste Is A Super Thick Rubberized Paste That Can Spread Shape, Form And Seal Virtually Everything. Starts Out As A Thick Paste And Dries To A Strong, Flexible, Rubber Coating. It Can Be Applied To All Types Of Surfaces To Seal Out Air, Water And Moisture. It Clings To The Surface And Instantly Fills Large Gaps, Cracks And Holes. It Wont Shrink Or Wash Away, Can Be Painted To Any Colour. Can Be Applied On Wet Or Dry Surfaces. Works Even Underwater. Expands And Contracts Never Shrink Or Cracks. Perfect For DIY Projects, Crafts, Hobbies And More. Withstand A Wide Range Of Temperature From -40 F - 200 F Once Fully Cure. (Apply In Temperature Between 0 F to 150 F). Non- Flammable, UV, Chemicals And Mildew Resistant. Work On : Wood, Glass, Tile, Concrete, Aluminium, Metal, Brick, Stucco, Roofing, PVC, EIFS, EPDM, CSPE, Hypalon Polyurethanes, And Much More.