Ubiflex B3 is a non-lead flashing that delivers durable, long-term waterproofing for roofs and building applications. Lightweight yet highly malleable, it can be easily formed to suit a variety of uses, including stepped flashings, abutments, chimneys, pitched roof valleys, dormers, rooflights, and solar panels.

The Ubbink Ubiflex B3 is a non-lead flashing material designed for use in all traditional lead applications, without the risks, weight, or theft concerns associated with lead sheet.

Available in Black or Grey finishes and supplied in 6m or 12m rolls with a choice of widths from 150mm to 1000mm, Ubiflex B3 is the professional’s choice for flexible, reliable roof detailing.

The Safer, Smarter Alternative to Lead Flashing

Key Features:

Multi-Application Use:
Ideal for stepped flashings, abutments, valley gutters, rooflights, conservatories, cavity trays and more — including sharp corners where flexibility is essential.

Wind-Resistant & Certified:
Tested by BRE in wind tunnel conditions up to 110mph (49m/s) when used with Ubiflex Gap Seal ensuring peace of mind in extreme weather.
Fully BBA Certified for general use.

Durable & Easy to Work With
Manufactured with reinforced aluminium mesh and a granular-coated bitumen surface. The underside features Kraft paper and film backing for ease of installation.
Fix securely with Ubbink’s High Tack Sealant for best results.

Why Choose Ubiflex B3?

• Non-toxic, lead-free alternative
• Lightweight, flexible & safe to handle
• Long-lasting performance
• Great for both new build and retrofit work