R-Guard Thru-Wall Flashing features an extra-tough, abrasion-resistant facer that can be exposed to UV for up to 6 months. Thru-Wall Flashing is simple to apply and saves on material and labor because it does not require a primer. Designed specifically to offer superior protection against punctures and tears, Thru-Wall Flashing is pliable and fits endless configurations across a myriad building materials, including OSB, exterior gypsum, plywood, concrete and metals. Use Thru-Wall Flashing as part of a building-wide R-Guard air barrier system.