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 ( 28 customer reviews )
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Most Helpful Customer Reviews
21 of 21 found the following review helpful:
 Great product, Much better than calkingOct 29, 2008
By Joseph Ellsworth
"Renewable Inventor and Principal Engineer Amazon"
I used this to seal the gaps around a window air conditioner. Also use it to seal some older windows that had small air leaks. Sticks great and stays in place but is relatively easy to remove when desired. Can re-use many times. Best use is anyplace where caulking may have been used but easier removal is needed. Great for anything that is seasonally installed.
14 of 14 found the following review helpful:
Great Product Easy To UseJul 06, 2010
By Great Faulkner's Ghost
When I installed my window AC unit 4 years ago I noticed there were gaps around the edges near the window frame. I'm no good with a caulk gun, so I thought I would try this. It did the job great. You just press it in like clay, except that it seems to stay pliable just like caulk from a gun. It really seems to push in there to fill the crannies and cracks. Recently, I replaced the old unit with a new one. The old caulk had held perfectly. It was also easy to remove. When the new unit was in, I used this again to caulk around the frame, and again it went in easily and effectively. I don't think it looks quite as smooth and professional as a good caulk gun, but it seals the gaps perfectly. That is all I was looking for, and I would use this again for similar jobs. BTW, this is the 90 foot roll. I used about 10 feet for my AC unit, because you waste some etc. I could have bought a smaller roll and saved a couple of bucks, but it's so cheap, I would just buy this size and save the leftovers for the next job, be it windows, doors, etc.
11 of 11 found the following review helpful:
Works where other Stuff FailsSep 30, 2009
By emalinx
The product description does no say how wide this roll is. There used to be wide and narrow versions of the product. I am taking a chance a buying it anyway because the picture shows the right number of calk strands.
The wooden covers of my crawlspace vents do not fit air tight, and the furnace air ducts are in the crawl, uninsulated. Between the crumbly cinderblock foundation, and the square of plywood used to cover the vents, there is an irregular gap that must be filled airtight before each winter. Tape won't stick, regular calk can't fill the big holes and regular calk will not stick to dirty or crumbling surfaces. If you use any other calk and it falls off in mid winter, you cannot re calk if the temp goes below zero.
Mortite is awesome. You can use the whole width, or separate the strands to make a narrower strip. It is like pliable clay, clean and easy to work with. It used to be reasonably biodegradable, made of chalks. It doesn't bond permanently, but sticks great against brick, cinder, rotted wood the problem surfaces.
Here is how I seal my vents. Remove plywood vent cover. Cut a square of closed cell foam to fit the opening. and place it into the opening on top of the screening. (I cut up the foarm mat sold to use under sleeping bags). Cut four lengths of the widest mortite (about an inch wide) and lay the strips about the opening so the center line of each strip is on the edge of the vent openting all around. The opening will be 'framed'. Press the putty lightly against the foundation, just enough to hold it it place. Carefully press the plywood vent cover back into the vent opening. The vent cover will press into the mortite lining the opening and make a great seal. Then, and this is the most important part, break off four more strips of mortite to cover the four sides of the rectangle opening. Lay each strip so half the strip overlaps the house foundation, and half overlaps the vent cover. Now you have a mortite sandwich with the edges of the vent cover. Press the Mortite tightly against the foundation of the house to make it sticke real good. Lasts all winter airtight, and my vent covers are rotted and wet. In spring, the putty comes right off
7 of 7 found the following review helpful:
Great product!!Apr 07, 2011
By C. Tien
I used this to insulate my windows during the winter where I could feel little bits of cold draft coming in. It works awesome!! My windows and trim are all white, and this light gray caulk was not too obvious in the seams. They peeled off very easily in the spring time without any type of residue. No stickiness, nothing. The caulk that came off was still pliable, too, like I can use it to seal another window immediately. It did not turn dry and hard and flake.
I could easily pull 1 or 2 or 3 strands off at a time, which I thought was great because some seams on my windows were wider than others. I love this product, and will definitely be back for more when I run out.
4 of 4 found the following review helpful:
Amazing, life-changing productNov 23, 2011
By W. C. Price
I live in an old apartment (built in the 1890s) with plenty of old windows. Almost every window had a bad draft, including one really egregious case in which a large window literally had gaps in its frame.
Leading up to winter, I researched a few possible products, and finally settled on this one as my primary vector of attack. It's dead-simple to use; I just roll a bit in my hands like play-doh, then press it into the cracks and gaps where drafts were coming in. It makes a tight seal, sticks well, and yet can be peeled off later with minimal effort. Magic stuff.
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based on 28 reviews
Atmosphere Solutions, LLC