BT20XL Butyl™
BT20XL Butyl is a cold applied self-adhering membrane composed of a tough cross laminated high density polyethylene film coated on one side with a layer of our proprietary butyl adhesive.
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Features & Benefits
- A 20 mil butyl self-adhering membrane
- Seals joints in exterior sheathing
- Self-adhered flashing to seal window and door nailing flanges
- 120 day UV exposure rating
- Safe for use on all wood, wood clad, aluminum, fiberglass and vinyl windows and doors, and PVC membranes
- Safe for use on all window and door flanges/nailing fins
- Recommended for high altitude, high temperature and/or highly conductive metal cladding/flashing (copper, Cor-Ten, zinc) applications
- Compatible with most construction sealants and will adhere to most construction surfaces
- IAPMO ER 362 certified
- Complies with ASTM E2112 requirements
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Technical Resources
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