Alien Seal is a revolutionary new seal that doesn't use adhesive, but is strong enough to insulate your home instantly! Alien Seal has the incredible new advanced-grip technology that instantly creates an air tight seal. Works great for windows, door gaps, leaky shower doors and so much more! The secret is advanced nano-grip technology. It's like millions of microscopic suction cups that lock on and hold tight to any surface. Alien Seal grips to everything, instantly. And there's never any residue because there's no glue! Block gaps and drafts fast. Just measure, cut, peel and stick. This weatherproof design can be used inside or outside as it is waterproof too! A perfect transparent design that works for all surfaces.