Flex Seal Liquid MAX, 2.5 Gallon, Black, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry

great product and easily applied with paint brush like i did...had a leak on a slight pitched shingle roof that i couldn't locate...after three buckets guess what...no more leaks(yeah) ! great product

It's worth it

Flex Seal Liquid MAX is a game-changer for sealing and waterproofing projects. The 2.5-gallon size provides great coverage, making it ideal for roofs, basements, RVs, and more. It applies smoothly, dries to a flexible and durable finish, and holds up well against water and UV exposure. Perfect for long-lasting repairs with a strong, watertight seal. A must-have for DIY and professional use!

Performs exactly as advertised. The surface is smooth once dried. I used it to coat the outside cinder blocks for planters in a pond and to waterproof the waterfall. Also applied to the area where the liner was covered by brick and mortar. It made a smooth transition and looks good. I will definitely purchase again.

THICK RUBBERIZED LIQUID YOU CAN BRUSH, ROLL, DIP AND POURSeals out air, water and moisture and is mildew, chemical and UV resistant. Available in black, white, clear, and gray.• Concrete and asphalt repair• Foundation repair• Prevent basement seepage• Weatherize and seal out moisture• Home and roof repair• RV and motorhome weatherizing and repair• Pools and pool equipment• Outdoor ponds and bird baths and much more!Works on: Concrete, glass, brick, stucco, masonry, wood, copper, plastic, tile, fabrics, wires, vinyl, fiberglass, ceramic, porcelain, metal, aluminum, natural stones, foam, asphalt, EIFS, TPO, PVC, EPDM, CSPE, Hypalon polyurethanes and more.Coverage will vary depending on the number of coats used and what type of surface you are applying Flex Seal Liquid onto. However, our available sizes typically cover the following area:1 Large 16oz – up to 18.75 sq. ft.,1 Jumbo 32oz – up to 37.5 sq. ft.,1 Giant Gallon – up to 150 sq. ft.2.5 Gal MAX Size – up to 375 sq. ft.

Top 2 inches of product was hard, Web site does not mention this problem. After using it, next time used - same problem. Had to throw out over 1/3 of product. 😞

Product works well but does not state that it would change from black to silver in sunlight and now shows bad patches on the areas used on the rolled tin roof. Very disappointing since we specifically purchased black and went in black! 😡

I was going to buy this at a large hardware store, but checked the price at Amazon and it was so much cheaper. Thrilled that I did. This fixes all of our leaks and is superior to any other product that we’ve tried.