Questions and Answers for Henry 885 Tropi-Cool Wet Patch White 100% Silicone Roof Leak Repair Sealant 0.90 gal.

A:  John, yes Henry 885 TropiCool 100% Silicone Wet Patch Repair Sealant is perfect for metal roofs. Henry 885 is tough and forms an incredible bond to the surface that stays flexible, is resistant to weathering, won't harden, crack, craze or chalk. The best benefit though is that Henry 885 has a lifetime warranty.

A:  Nidham, Henry 887 and 885 products are made to be used on aged TPO roofs. In most cases you don't need to use the 296 Fabric with the 885 patching sealant although it won't hurt if you decide to use it. As in all roof coating applications it is a good idea to do several small adhesion tests on a cleaned area just to make sure that you are getting the adhesion you need before proceeding with the entire job.

A:  Danny, since we have not tested Henry 885's use over Dicor Lap Sealant you would have to test it to see how well it adheres. If the Dicor has weathered for 3 months or more you shouldn't have a problem but you should perform several adhesion tests before proceeding.

A:  Stella, Henry 885 TropiCool Wet Patch Roof Sealant will adhere to an aged rubber roof and on roll roofing. Just make sure the area to be patched is clean.

A:  John, if the seam is open ¼” or more use the HE296 polyester fabric with the HE885 before coating with the HE887.

A:  DWick, Henry 885 is ready to use right out of the can and requires no mixing. Repair all cracks, splits, tears and holes by applying 1/8" to 1/4" thick with a brush, trowel or putty knife. Work the sealant into the crack or seam and spread 2" to 4" inches beyond, feathering the edges.

A:  RTJR, you will need to remove the rust from the metal by wire brushing it. Dust, dirt and rust can interfere with a good bond to the surface.

A:  RTJR, Henry 885 and 884 differ slightly in their chemical make up mainly in the silicone dioxide content and tensile strength. The tensile strength of Henry 885 is 120 psi vs Henry 884 at 180 psi. You should let the Henry 884 cure for at least 24 to 48 hours before coating over it. You should note that both 885 and 884 are roof repair products and normally are used in conjunction with Henry 887 TropiCool 100% Silicone roof coating.

A:  M1967, Henry 885 TropiCool 100% Silicone will adhere to metal roofs. You will need to make sure that the surface is clean and free of all dust, rust, residue, foreign matter and all contaminants such as chalk, grease or dirt that would interfere with a good bond. You should test the adhesion on the surface prior to use. Metal roofs are sometimes coated with a plastic film or a thin layer of oil at the factory. Testing the adhesion first is always a good idea. The hot sun will not affect the performance of Henry 885.

A:  RTJR, Henry 885 TropiCool 100% silicone is not designed to be a roof coating. 885 is a patching sealant to repair leaks. You should use Henry 887 TropiCool 100% Silicone Roof Coating if you want to coat your roof with a waterproof coating that is also highly reflective. You should not use Henry 885 over Henry 209XR that has not had the ability to cure for at least 90 days. Tar based products exude oils when the temperature heats up and could cause adhesion problems if not cured completely.