Our White Weatherstripping, also known as Gaska, is made of polyethylene. It comes on 35 foot rolls and has one sided adhesive to seal doors to main frame. It is 1/4" x 1/2" x 35'. This weather stripping is used on our own All-Rite doors and has been used on Motorhomes and RV's such as Fleetwood, Winnebago, Forest River, Thor, Skyline, Monaco etc.