Imus Seal Butyl Joist Tape for Flashing Deck Joists and Beams (1-5/8” x 50’ Non-Skid)

Bought 6 rolls of this tape. Easy to apply, very sticky and stays put. It’s a close fit to a joist which is 1.5 inches so there’s not a lot of wiggle room. But does what it’s supposed to do. Much cheaper than the big name brand items and for what it does, you’ll never know the difference.

Easy to apply with good adhesion.

I’m no deck building master. I can only compare this to the Tr*x tape I bought for the doubled beams. To me this tape was better than the Tre* tape. It adhered good and was easy to work with. Just like all the other tapes don’t lay it on anything dirty. The sides of the rolls are sticky and will pick up any dirt it touched.

Ive tested this product for 8 years in harsh, outdoor weather extremes and it holds up fantastic. The glue does not dry, remains waterproof, and is almost impossible to remove later. Acetone has trouble dissolving the glue so dont expect this tape to come off if applied to a clean, oil free, and dry surface. I reordered 8 years later and the product seems the same. Dont change a thing, thanks!

Ive seen a number of questions and comments about the tapes specs, so here goes. THICKNESS: using a micrometer, the thickness of the tape + backing paper is 0.023 thick, and the paper backing is 0.002 thick, which means that THE TAPE ITSELF IS 0.021 THICK. The butyl tape seems to be of good quality but I cant tell you how long it will last when exposed to the elements. Is it gooey? Yes. I have no way to measure gooey, but I had occasion to put some of it down on a girder, then two weeks later I changed my mind about the joists that would go over it. I then removed the tape and thought you might like to see what it looks like as you peel the tape away. See photos. When the tape came off, it left a lot of this glue on the wood. I used the removed tape as a way to lift off the goo, much as one wraps Scotch tape around your hand, sticky side out, and then use it as a lint brush. Thats what I did except I didnt wrap the discarded tape around my hand ... too messy. I eventually got most of the glue off of the wood, but there is still a bit left. I can therefore attest to the fact that THIS STUFF IS GOOEY and will probably do a good job of preventing moisture from getting past it and into the wood that it protects, which is its main job.

Adheres well but pricey

It is an excellent deck tape. I have nothing to envy to those of much more expensive brands, it worked great wonders.

It is the same product as a name brand at greater cost. You should use it to cover deck joists where deck boards will rest, and I used it as well to cover deck screws holding the frame together. By the way I recommend (and did so) to caulk every other wood penetration event though I used treated wood. Overkill costs little but I do not want to ever replace rotten wood. I used composite deck boards and expect the deck to last 25 years.

We replaced our deck and kept the existing joists. To extend the life of the joists we lined them with this tape. It was easy to use, and had great adhesive.

I am replacing my 20 year old treated decking with maintenance free decking and using the hidden clip fasteners. This product works well to cover the old holes and to just prevent water from sitting on the top of the boards. If you wipe off the boards first this does stick pretty well. Since it is black it also looks better in between the boards.