Gator Seal Underlayment - crm.catalystglobal.com bbcf7d
Modified asphalt reinforced with an extra heavy fiberglass mat. Webapply gatorseal underlayment to the roof, starting at the eave. Its durable high strength design.
This product can be left exposed for up to 120 days. The first course of gatorseal underlayment should be parallel and flush to the edge of the eave.