Rated 4.5 out of 5 by 22
Rated 5.0 out of 5.0 by dragonfly Very good product
I was using this foam to seal around the rocks in my waterfall to avoid leaks. It has worked great. It had adequate expansion, but not excessive to fill the voids around the rocks. It sets up fairly quickly. You can sprinkle sand over the foam and shape it around the rocks when is has partially set, to give it a color matching the rock. Worked great!
October 4, 2016
Rated 5.0 out of 5.0 by NEVETS GREAT OUTDOOR SEALER
THIS PRODUCT IS ALSO GOOD FOR FILLING OUTDOOR GAPS
October 18, 2016
Rated 5.0 out of 5.0 by Destiny Insulating Foam Sealant for Ponds
The best stuff for building fountains. And it comes in black, which is a must.
August 30, 2016
Rated 5.0 out of 5.0 by AA Great for sealing leak on roof by chimney
I have a flat roof that had a spray foam roof over the old felt roof. The old felt flashing in the chimney came away from the chimney taking the foam with it allowing rainwater to flow down the side of the chimney into the house. I broke away some of the old felt/foam, pushed the nozzle of the can into the crack and squirted. Eventually the foal sealant came out of the crack and I no longer get water coming into the house when it rains.
December 31, 2015
Rated 5.0 out of 5.0 by DCL Great Stuff
Great Stuff is just that, great stuff! This is the black version, designed for waterfalls and ponds. I wish the stores in Houston would carry it.
August 23, 2016
Rated 1.0 out of 5.0 by Jose Awful product
Excellent customer service and fast shipment but the product it's awful... At first it expands as it is supposed to do but after 3 days it shrinks almost 1/3 of it size leaving a gap..
August 16, 2016
Rated 3.0 out of 5.0 by gzuckier Not quite what i was looking for.
My idea, such as it was, is to fill the cracks in my driveway with the expanding foam before topping. Tried it with the usual Great Stuff a few years ago, works better than the stuff sold to fill cracks. But it's yellow, so needs a good coat of blacktop to cover it, and when a piece breaks off the yellow is back, so I discovered this stuff which is black.
So it behaves like the usual Great Stuff, color is kind of a very dark eggplant/brownish.
But the problem is that after a couple of days of sunlight, it's faded to a slightly greenish version of the same yellow.
So, unless you need black foam indoors, I guess, there's not a lot of reason to use this rather than the normal colors
Didn't try it underwater to see if it holds color better then.
July 12, 2016
Rated 2.0 out of 5.0 by Oldtimer Disappointed
Ordered this product to fill in some gaps in my railroad tie wall. Seemed to work ok, but a can of it didn't go very far. After a couple of months the color changed from black to olive green - not good.
I would not buy this product again. Cheaper to buy the regular Great Stuff at half price and paint it after it dries.
July 19, 2016