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October 18, 2021

Professional Tool Reviews for Pros


Polyglass Polystick XFR Self-Adhering Fire-Resistant Roof Underlayment

Polyglass Polystick XFR

Protect Your Roofing from Weather Extremes

The Polyglass Polystick XFR is a dual-purpose fire-resistant and self-adhered waterproofing underlayment featuring the proprietary Burn-Shield technology. This underlayment works with metal roofing, asphalt shingles, mechanically attached tiles, or any other application where you’d like to provide some water-proofed protection against extreme heat.


10-Second Summary

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  • Polyglass Polystick XFR Self-Adhering Underlayment
  • UL Class A Rated
  • Combines ADESO and Burn-Shield technologies
  • Features SBS modified bitumen upper compound and self-adhesive compound on the bottom
  • Fiberglass reinforcement
  • Withstands temperatures up to 265°
  • Can be installed as part of a multi-ply underlayment system
  • Can be exposed for up to 180 days
  • Up to 30-year warranty

How Many Ways Does the Polyglass Polystick XFR Protect?

Polyglass Polystick

Polyglass tells us that, while other fire-related underlayment products will struggle to find a balance between fire protection and reliable waterproofing, the Polystick XFR combines their ADESO and Burn-Shield technologies with high-quality materials to excel in both areas.


This underlayment helps combustible decking achieve a UL Class A rating as well as long-term weathering performance. It can withstand temperatures up to 265°.

The Polyglass Polystick XFR’s ADESO Dual-Compound Self-Adhered technology features an SBS (elastomeric) modified bitumen upper compound and a self-adhesive compound on the bottom. Fiberglass reinforces the underlayment to provide strength and stability. Polystick XFR applies quickly to save on labor costs.

You can also use the Polystick XFR as a secondary layer above Polystick MTS Plus as part of a multi-ply underlayment system. Able to withstand exposure for up to 180 days, you can use it with works-in-progress.

The Polyglass Polystick XFR comes with a standard 10-year limited material warranty or a 10-year Polystick labor and material warranty when installed by a Polyglass registered contractor. Polyglass also offers a 30-year 2-Ply Polystick labor and material warranty. This can apply when two plies of the Polystick XFR treatment are used and installed by a certified contractor.

For more information about Polyglass underlayments or any other products in Polyglass line, visit polyglass.us.

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