By Anderson Manufacturing Company
Part # ANDBT15
Butyl Tape is a hand-moldable rubber-like gap filler that can be applied underwater without messy caulk guns or mixing. Note that it is not like a traditional "tape" with only one sticky side, since the tape (or ribbon) of butyl tape is tacky on all surfaces. It retains a flexible and tacky consistency making it well-suited for a variety of permanent or temporary leak-stopping applications:
Butyl Tape never hardens and packs well into voids. It is removable and reuseable. Stretch it out a bit if you need it thinner or roll it on top of itself to make it thicker.