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

If youre looking for great adherence and seal performance then this stuff fabulous, but the backing material that gets peeled off is so slippery and slick that it makes application really difficult for one person to do especially if youre standing on a ladder and very limited in reach to keep it in a straight line so it doesnt fold up onto itself as youre laying it down. Recommend two people - one to pull on the backing and the other the lay it flat and straight.

We are repairing a deck because of the problem that tapes like this are intended to prevent. Several of the deck boards and joists had rotted and needed to be replaced. This tape looks to be an ingenious solution to the problem of dirt and moisture collecting in the gaps between the deck boards above the joists. The tape went down easily. Cutting the lengths of tape before going up the ladder to apply them was a good idea. Its best not to fight the roll while applying the tape--especially when one is on a ladder twelve feet above the ground. The tape is only 1/8 wider than the standard 1 1/2 wide joist. Thats only 1/16 on either side of the joist, so one must be careful when centering the tape on the joist. Overall, applying the tape went quickly for us. Ill add that the top of the tape is slippery, so the deck boards easily slide before they are attached. This is nice for positioning them, but also could be a danger if one is not careful while walking over the boards before theyre attached. This tape is well worth the investment. Dont build a deck without it.

I recently replaced a redwood deck with a Brazilian hard wood. I noticed joist decay was primarily due to moisture in the gaps between the deck boards. After replaced and repair the joists, I applied this product. I am confident this will extend the life of the joists and deck board. Easily applied and great adhesion.

Tape for the deck joists to help protect from rotting. Very easy to use. I used it on the deck base of a composite deck that I built. Great product, will save the deck framing for many years.

Adheres well but pricey

Extremely tacky. When I removed the deteriorating wood boards on my deck the joists had not been taped. Decided to tape before installing the new Trex. Sticks and sticks well even on weather materials.

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!

This was very easy to use. It came very quickly. I used it under my Trex decking, on top of the wood frame joists

I cleaned the joists and beams thoroughly with a broom and vacuum. It was going to be a hot day, so I did the taping in the morning when it was about 75 degrees. I had no problems with this tape sticking. It was fairly easy to peel and lay out. Curves on warped joists slowed things down a bit, but overall it went pretty quickly. I walked on the tape to seat it. I live in an area where the climate is generally dry, so this is probably overkill (in fact 2 people at Home Depot here had never heard of deck flash).

super sticky and seems to do the job very well. Guess I wont know for years if its properly protecting my deck joists, but it looks promising. I know when I back out some screws they were covered in the sealing material, so that seems good.