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.

Features

• Creped film offers exceptional stretch with minimal bunching
• Can be installed in temperatures as low as 10° F
• Resists UV exposure for up to one year
• Self-seals around nails and fasteners for lasting watertightness

Packaging

• Roll Length: 50'
• Roll Widths: 6", 9"

Related products to qualify for the 15 year warranty

WeatherSmart^®

Moistop^® Sealant

FortiFlash^® Butyl

Literature

Henry Residential and Light Commercial Product Catalog

Henry Fortifiber® 1-2-3 Moisture Control System™ Warranty Brochure

• Data Sheets

  FortiFlex^® Butyl Product Data Sheet  

  FortiFlex^® Butyl Safety Data Sheet  

• Install Guides

  Install Guide

• Architectural Details

  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

• Warranties

  15 Year Warranty

  Standard Warranty

• Videos

  How to Install FortiFlex Butyl on an Arch-shaped Window

  How to make a sill pan with Fortiflex® Butyl

  Window Flashing Method A1

Tools