After trying a bunch of stuff, I have settled on the EternaClean EC-1 spray cans as the best/easiest way to remove old dicor, butyl, etc from our 96LY roof and wall seams. Works better than most of other stuff, and easy to use.
Went thru literally 6 cans in the last few weeks - I had placed the original order through Amazon - the best price I could find online - seems no one in town (Tucson) carries it. Paid $12.61/ can, 2 day free shipping.
Still have a lot of roof to do - and needed more. Went to order from Amazon, and it is now $19.05/ can!
I'm not paying 50% more...
Did some more searching, and of all places, Walmart online has a deal with "Zoro". I.e., order through Walmart online, and the order is sold and shipped via a company called "Zoro", out of Buffalo Grove, IL.
Would you believe $6.74/can with free shipping on orders over $50! That is almost 1/3 the price on Amazon. Ordered 8 cans for the free shipping on July 4, it shipped on the 5th, and arrived today.
Now if I could only get these two fans, skylights, and the running lights finished...
BTW, I did find a polyethylene stripper from ACE; had never seen that before. Worked amazing, even better then the EternaClean. Only 2 problems.
1. It burns your hand if you don't wear gloves.
2. It literally eats the fiberglass roof. Dissolves, actually. I tried it on a small, maybe 2" square section . That area is now smoother than the rest of the dimpled fiberglass roofing everywhere else...