Hoerschel wrote:
I would concur with using the Henry's 887 TropiCool 100% silicone after sealing cracks and seams as needed with the Henry's 884 caulk-type 100% silicone tube sealant. After extensive conversations with Henry's customer service reps, I was informed that it is not normally necessary to remove old sealant or dicor. After thorough cleaning using TSP or Simple Green (will NOT leave residue like Dawn dish washing soap), apply the Henry 884 over cracks and gaps, let cure per label directions, and top-off with the thick liquid 887. I just did mine and very happy with results. Lots of work, but saved lots of money, too.
I just finished my TT roof this weekend.
I cleaned out all the old Dicor where my roof gutters run and then re-sealed that with the 884 caulk.
I used TSP and a scrub brush on my hands and knees to clean the roof ahead of time. Came out very clean when done. Then first coat of Henry 887 right over the old Dicor that was around all the roof flashings for the vents, A/C, refrig vent.
I am really impressed with the Henry. Did a great job of covering and sealing everything. I did two coats. Nothing is getting past that stuff.
One thing I learned on the first coat: I went about it like you would paint a room. Did all my brush "cutting in" first them went to roll and by then the brush work was starting to dry a little. When it got hit with the roller it kind of skinned where the brush work was done.
Second coat I "cut in" with the brush in stages and then immediately rolled the area. Did the roof in sections that way and no problem.
Bought a 5 gal bucket at Depot and I only used 1/2 of that for two coats on a 25' roof. It seems really thick when you go to roll it. You would think it isn't going to go far at all, but it really spreads. Looks like I will coat the roof of my cargo trailer now since I have the extra.
The stuff is weird. I noticed immediately that morning dew does not dry off of the roof as soon as the sun hits it like the un coated roof and it literally does feel "cool" to the touch vs an uncoated roof.
I ordered a new cap for my refrigerator roof vent since the old one looks like it is about to dry rot. Really looks bad against that bright white roof now. Of course "back order". I will take a picture after I put the new roof vent on when I get it.
