FortiFlex® Butyl is a highly conformable, self-adhering waterproof flashing, making it ideal for sill pans, arched windows, and other curved penetrations. It features a lightwight creped film that resists UV exposure for up to one year and delivers exceptional stretch and minimal bunching. FortiFlex Butyl is made with a unique butyl formulation that maintains high tack even at installation temperatures as low as 10° F.
When used as part of the Henry® 1-2-3 Moisture Control System™, FortiFlex Butyl is backed by an industry-leading 15-year warranty. Repairs are covered for both materials and labor with a single point of contact.
FortiFlex® Butyl Product Data Sheet
FortiFlex® Butyl Safety Data Sheet
Install Guide
VPWRB-6A-F1 Flanged Window Section Method A1 - Fortiflex Butyl
VPWRB-6A-F2 Flanged Window Sequence Installation Method A - Fortiflex Butyl
VPWRB-6A1-F1 Flanged Window Section Method A1 - Fortiflex Butyl
VPWRB-6A1-F2 Flanged Window Sequence Installation Method A1 - Fortiflex Butyl
MAWRB-6A-F2 Flanged Window Sequence Installation Method A - Fortiflex Buytl
MAWRB-6A-F1 Flanged Window Section Method A - Fortiflex Butyl
MAWRB-6A1-F1 Flanged Window Section Method A1 - Fortiflex Butyl
MAWRB-6A1-F2 Flanged Window Sequence Installation Method A1 - Fortiflex Butyl
15 Year Warranty
Standard Warranty