7mil heat shrink wrap 17ft by 22ft for winterizing weather proofing shipping protecting boat protection and winterize (17ft x 22ft) plastic protection our resin heat shrink wrap has been meticulously manufactured in the u.s. to give your boat, rv, snowmobile, jet ski, or palleted shipment the best possible protection. a propane heat gun is recommended for shrinking or folding material. shrink wrap tape and twine are not included. product must be heated to 275 degrees to shrink. 12 months uv protection.