http://www.google.com/url?sa=t&sourc...xDWXl5L3oUt0vg
Cut hole is canvas on the bimini put your triple wall pipe thru then spray this $hit on there!!! It's the best stuff ever!!! It has a burn rate up to like 50 million degrees and will also water proof the roof penetration. The cool thing about this product is if you buy one can for 19.95 then you get like 50 cans free!!! Hell of a deal.