The Sealing Tape consists of a flexible ionomer film with a foamed mass of 40 or 80 mil acrylic adhesive (and a very tacky acrylic at that) on one side. A film release liner protects the ionomer film adhesive layer and allows the product to be self-wound into a roll. In case you are not familiar with the term “ionomer”, the technical definition is a polymer that is comprised of repeating electrically neutral units with a fraction of ionized units that are covalently (shared electrons) bonded to the polymer backbone.
A more practical way to think about ionomers is by thinking of DuPont’s Surlyn which is a tough film made from ethylene (electrically neutral) and methacrylic acid (ionic). It’s the tough outer cover used on golf balls and the film on the Extreme Sealing Tape is tough too.(and you can paint it) The 40 or 80 mil acrylic adhesive layer bonds on contact to many metal and plastic surfaces and can generate peel values in excess of 15 lbs./inch.
It’s softness allows it to easily conform over metal seams, contours and fastener heads and it seals out water like nobody’s business! Extreme Sealing Tape was meant to compete with liquid sealants. It is easy to apply, and eliminates the mess associated with caulking guns. Its’ unique design prevents it from cracking or crumbling, it resists high pressure washing, and can compensate for thermal expansion and contraction.
