Maintenance for Silicone Roof Coating on EDPM
So back in 2008 I replaced my EDPM roof with fresh EDPM and Eterabonded the heck out of it to try and do a "once and for all" kind of job. I documented it on this forum but older posts seem to have ...
Forum Discussion
I own a 2003 Alumascape trailer with EPDM roof. Twenty years ago I put Eternabond tape on all the roof seams. Four years ago I found Henry's Tropicool at Home Depot and bought 2 cans .9 gallon each. It went on very easily with a roller and looked good. I tried 2 of the aerosol spray cans and they were a bust. The product was too thick to be sprayed and I felt that was a waste of money. Just recently I noticed some small areas starting to peel off. I believe I should have applied 2 more .9 gal cans when I did my initial application. One other problem I had was my roller I used to spread it was losing fibers. Make sure you get a good quality roller. BTW my trailer is 25' long.
Thank you for the reply. I have a slightly smaller trailer with a sloped front end. So the actual roof to treat is like 8x20. So I was thinking the Henry 887 in a 5 (4.75) gallon bucket. Thanks for the tip about using a good roller.
Just found this at Henry's website:
https://dam.henry.com/m/7a41340dd62b6fc3/original/Tropi-Cool-RV-Brochure-Spread-USEN-LR.pdfThey recommend a kind of two step process:
TO PREP
Henry 884 Tropi-Cool 100% Silicone Roof Sealant
or
Henry 885 Tropi-Cool 100% Silicone Seam & Repair Roof Sealant
TO COAT
Henry 887 Tropi-Cool 100% Silicone Roof CoatingI had not heard of the 884 and 885 before. I will need to look into that. I am not sure if they are saying to coat the whole roof with 885 or use is as spot treatment for difficult areas. The 884 caulk does looks handy for treating leak prone / suspect areas before the 887 coating. I intend to give the roof a pressure wash and scrubbing with something that can take the shine off the Eternabond for better adhesion. The cooler weather of fall is coming, so I need to read up so I can take advantage of the nice dry weather to do the job.
Good luck with your repair. I think my biggest mistake was not buying the 5 gal. bucket of Tropicool 887. I started by washing the roof, then applied the 884 caulk to areas that the Eternabond tape was lifting. I used the Tropicool Stop Leak (in a spray can) around a few irregular shaped areas such as a skylite over the shower. Not the whole skylite, just the edges where it meets the roof. That can of 880 Stop Leak does not contain much product. I am thinking about doing my whole roof again with just the 887. However, I am in my 70's and don't really like being on the roof anymore. Good luck!
