Flex Paste Max Is A Super Thick Rubberized Paste That You Can Spread, Shape, Form And Seal Virtually Everything. It Start Out As A Thick Paste And Dries To A Strong, Flexible, Rubber Coating That 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 And Can Be Painted Any Colour. Can Be Applied On Dry Or Wet Surfaces, Even Underwater. Available In White And Black. In Tub And Cartridges. Repair Concrete And Foundations, Seal Out Rodents And Pest, Great For Auto, Boat, RV Repair, Stop Roof Leaks Fast, UV, Chemical And Mildew Resistant.