Polyanchor XFR is a fire-rated dual purpose ember and water resistant underlayment. Polyanchor XFR features a plastomeric modified bitumen upper compound and a self-sealing SBS modified compound on the bottom. Polyglass’ patent pending Burn-Shield Technology®
provides superior ember resistance. Polyanchor XFR features a slip-resistant embedded mineral aggregate walking surface which contributes to the overall ember resistance of the membrane. The bottom surface is sanded to protect the self-sealing compound. Polyanchor XFR is ideally suited for mechanically attaching under clay/concrete tile roof covering systems where ember resistance is required or desired.
Typical Applications
• Full roof coverage on combustible decks and under Class A roof coverings to protect
against burning embers
• As a water-resistant barrier on steep slope roofing under concrete, clay, and slate tiles
as well as shingles and shakes
• Areas prone to wild fires as required by building code
Features and Benefits
• Patent pending Burn-Shield Technology provides superior ember resistance
• Meets CA code requirements – Class A Fire Rated ember resistant underlayment for WUI
(Wildland Urban Interface)*
• Fiberglass mat provides increased strength and fire resistance
• Mineral aggregate surface engineered for superior slip resistance
• Tough plastomeric modified asphalt top compound for tile stacking
• Self-sealing elastomeric modified asphalt bottom compound
• Up to 180 day exposure
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Associated Products
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SELF-ADHERING FLASHING STRIPS