Gator Seal Underlayment - crm.catalystglobal.com 81011f
The first course of gatorseal underlayment should be parallel and flush to the edge of the eave. This product can be left exposed for up to 120 days. Webapply gatorseal underlayment to the roof, starting at the eave.
Modified asphalt reinforced with an extra heavy fiberglass mat. Its durable high strength design.