Flat Roof Repair With Henrys

I have a composition on flat roof. I had a area that had delaminated as a bubble, as I have been unable to chase a leak, and tore a 8"x8" section of roofing out, and the paper underneath as this is what I was told to do by a roofer. It has a layer of roofing below I believe. Then I flooded it with Henrys 208R with fiberglass on top and the perimeter, and covered that with the same. I went to the Henrys site and think it said that I should have slit the bubble, pulled it back and taped and coated the patch. Was the way that I did the repair wrong? It is now about 1/4"-3/8" of 208r. It is dry and not raining this week, perhaps in

4-5 days, so perhaps I should have used 205, also recommended on their site. I understand that this stuff does not harden completely. Not sure how long it takes to dry. Should I do anything else. It is in an area that ponds over a bedroom. Help if you can!

Mike-

I've been case a crappy flat roof section on a shed area of my garage for nearly 30 years...the Henry's site method is what I use....slit bubbles to remove / eliminate.

But the real problem is the ponding, I used to have ponding in one coners (opposite the rood drain loaction). I built up the ponded area with liquid Henry's (108?) and very small pebbes. Got rid of 90% of the ponding problem and nearly all the leaks....but mine is a garage so perfection is not required.

Can you build up the area with layers of roll comp cut to match the pond? Mastic down so as to avoid nailing through the membrane of the roof. I swtched to using 108(?) and wet patch. The 108 ideally needs a couple days before rain.

Good luck I think we're due for some ran next week.

cheers Bob