3040BK 4” is used by deck builders as well but also moves into the window and fenestration application. High performance, repositionable, and able to be installed without the use of razor knives or scissors make G-Tape™ Flashing unlike any other product you’ve seen.

Ultimate Flashing performance with unmatched contractor friendly features. AAMA 7-11 Level 3 Class A means 3040BK Flashings meet the highest standards for hot and cold performance and does so without the need for additional primer. Lighter weight than butyl or rubberized asphalt flashings 3040BK outperforms these products by significant margins.

-3040BK is used to professionally flash Windows, doors, deck beams, etc. Use anywhere you need permanent protection.

-3040BK Flashings have been recently tested for 50 year aging and have demonstrated to retain over 60% of original adhesion and over 100% of original tensile strength. We challenge all other Flashing products to do the same.