What is Burn-Shield Technology?

Burn-Shield Technology is a patent pending innovation that offers fire resistance capable of achieving the highest level of fire ratings on steep-slope roofs, featured in Polystick XFR, a self-adhered high temp underlayment and Polyanchor XFR, a nailable underlayment.


Polystick® XFR is a dual-purpose fire resistant and self-adhered waterproofing underlayment, which feature Burn-Shield and ADESO® Technologies. The result is a product that helps in achieving superior waterproofing and UL Class A fire protection in a single layer*, instead of the typical solution requiring multiple layers to achieve the same result.

This translates to labor and material cost savings which ultimately benefits the building owner and contractor. The building occupants can enjoy the peace of mind knowing that Polystick XFR is providing safety and protection of their possessions while complying with fire-rated building codes required in many municipalities.

View Polystick XFR brochure

Features & Benefits

  • Superior protection against fire spread/penetration and ember resistance in systems tested under UL 790
  • Helps achieve UL Class A for Combustible Decks a using a single layer*
  • Robust 80 mils (2 mm) of waterproofing rubberized asphalt
  • Self-Adhered with split release film for ease of application
  • Fiberglass reinforced for added strength and dimensional stability
  • Skid-resistant top surface with max 180 days exposure
  • Dedicated side lap for consistently strong seams
  • Approved for applications up to 265°F
  • Up to 30 year warranty
    (Reference Polyglass Warranties Terms & Conditions)
  • Unlimited Slope. Refer to published UL product listings (TGFU.R25992) for specific fire rated assemblies.



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.

Features & 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

View Polyanchor XFR Sell Sheet

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Why Polyglass?

Polyglass® is an ISO 9001:2015 Certified, leading manufacturer of modified bitumen roofing and waterproofing membranes and roof coatings for low- and steep-slope applications. We are an industry leader in self-adhered underlayments that are specially designed to help contractors save time and labor costs.

Utilizing the most technologically advanced manufacturing process in the industry, Polyglass operates six state-of-the-art manufacturing facilities — five in North America and one in Italy that serves all of Europe.

As a company that prides itself in innovative and quality roofing products that exceed the needs and expectations of its customers all around the world, we offer roofing contractors the following benefits:

  • An extensive line of underlayments and other roofing products that allow for custom-designed solutions for unique construction challenges and environmental conditions
  • Outstanding technical support and project assistance
  • The most trusted warranties in the industry
  • A registered contractor program and a wide array of contractor resources, including instructional videos to Polyschool courses.
  • The ability to earn points and redeem prizes for every Polyglass purchase with Club Premio