Butyl Tape 1/8" x 1" x 50' Gray (Choose 3/4" or 1" Width)

I used this product to seal up the corners on an old truck camper. I had to replace some large sections that were rotted but I was able to use the old trim pieces with new screws that were slightly longer and this tape. It is also commonly used around windows and doors. If you’re not sure what this is used for... This product is like a putty and is a “pinch seal”. Your screws will pull the trim to the wall panels and pinch the tape which creates a seal. It also seals around your screws. I usually caulk the edges for extra protection but you don’t have to. Caulk is messy and a pain to get off. Most people use a thin strip of plastic to fill the channel where your screws go. I used a self leveling caulk made for camper roofs. And another caulk for vertical surfaces from the same company. It was expensive but I’m hoping it was worth the cost. Seems to be holding up well. I have not tried to remove either product yet.

I recently replaced a solid door with a full single lite fiberglass door and used this in 5 strips across the leveled sill, that was off by 1/2" over 3'. This is very sticky stuff and is hard to adjust if you get the first placement wrong, so don't be wrong. Keep the paper backing on until you're ready to set the door, period. Then peel it off slowly, especially if you're installing on an old sill, and use a plastic pen or something like it to keep the strip down as you do, if needed. This stuff seals completely, no air, no bugs and no kidding! I've used endless tubes of caulk for many things during my construction life but I know this is better than shooting lines of caulk and hoping you don't drag any out of line while installing the door, creating a breach.

i order a roll of this stuff like once every couple months for work i am a telephone and internet tech and we used to be able to order similar stuff called air seal we used it to seal the grommets where the wires come through in the telephone NID box on the house but we cant any more we only get silicone which sucks to use because it doesnt stay pliable so when you add another line in the future you have to peel it out and put new silicone, this stuff doesnt harden it stays nice and pliable and seals the wires up great keeps bugs out and moisture and you get way more for cheaper than the other stuff ive ordered similar to this

This is the 3rd type of tape I have used on a project camp trailer. I first used the light grey putty tape that has the super crinkly paper, then the XFasten white butyl tape, then this GSSI butyl tape. The GSSI is definitely the easiest to use. The wax paper is thick and slick. The Xfasten was good butyl, but in unrolling it the wax paper kept sticking to the butyl and tearing, and my fingers got all sticky trying to pick the paper out. The GSSI paper never tore, and the butyl came off nicely. The trick was to unroll one layer of paper off so that the butyl is exposed all around the roll then start unrolling the butyl and tape together. You have to hold the roll carefully and not let it touch anything (a second set of hands would have been helpful, but not absolutely necessary), but that way the putty stays stuck to the wax paper until you want to peel it off. It cut nicely with a razor knife. I ended up buying a 2nd roll of it, and will buy the GSSI again if I need more.

I Wish I had of Known about this Stuff Years Ago; I would have used miles of it by now. I love it when I find something like this that surpasses anything else I have been using for years. On recommendation, I used this to seal the edges of a new cab-to-sleeper boot. This stuff beats anything else I have ever worked with. I just rolled it onto the perimeter of the opening, laid the boot over it, tacking it in place with a screw every four inches, then another layer of this butyl mastic, and then the "clamp", putting another screw through the whole works every four inches, dividing the distance between the first screws such that there is a screw every two inches. This stuff squished out pretty much equally on both sides of the perimeter, giving me confidence that there is not going to be nary a drip when it rains heavily, nor when a foot of snow and ice is trapped between the cab and sleeper, slowly melting and trying to find a way inside. Now that I have found this wonderful stuff, I have been thinking of numerous places where I intend to use it. My product arrived neat as a pin and in really good condition. I can't recommend it enough.

I have used this sealant on many remodeling projects around the house. It adheres well, seals well and is easy to apply. It remains flexible over time. It's not hard to remove and can actually be re-used unlike silicone sealant. I have used it when installing window frames and door frames, behind roof drip guard and gutters, underneath of chimney flashing, around fan vent flashing, to seal an outdoor electrical outlet and a frost-free sillcock, and to seal around windows and window trim. It can fill little holes in sheet metal and it can be painted over. It also worked well for sealing the long gable trim pieces and ridge trim seams when I replaced my garage roof with steel roofing sheets. Great stuff.

If you've ever bought butyl tape before, you'll notice the warning that's usually on the package. It'll say something like "LAY FLAT", "Do Not Store on Side", etc. Buy this stuff from a retailer on Amazon and there's no telling if those instructions were followed or not. I won't claim to know in this case. I only know that I've worked with a lot of butyl tape over the years and none have been as miserable to work with as this stuff. It was very uneven in thickness and width, indicating that it had been squished along the way, maybe for quite a while. It also had an annoying tendency to stick a lot more to its own release paper than anything else. It would stretch before letting go. Pretty disappointing.