Low Slope (TPO and Liberty)

TPO Thermoplastic Polyolefin

  • Great Value — Superior performance at a cost-effective price

  • Excellent Seam Strength — Heat-welded seams provide greater seam strength to taped and other seams

  • Long-term Weathering — Excellent long-term heat and UV resistance

  • Energy Saving — Highly reflective and emissive white roof can help reduce energy costs and urban heat island effect

  • Versatile Application Method


Why GAF EverGuard® TPO?

  • Outperforms standard TPO in heat aging and UV tests—the best predictors of TPO performance
    – After accelerated heat aging at 275°F (135°C) for 105 days, EverGuard® TPO showed no cracking—while every one of the competitors’ samples had failed!
    – UV testing—Greater than 2.5 times the industry standard (ASTM D6878 weather resistance test

  • Guarantees are available up to 20 years when using EverGuard® TPO 45 mil Membrane.*

  • Easier to install due to:
    – Large welding window
    – Most complete line of accessories
    – 10′ (3.05 m) wide sheets



EverGuard® TPO Membrane is suitable for all types of single-ply systems:

  • Mechanically Attached Application… for a quick and cost-effective system that can be installed practically year-round.

  • RhinoBond® Application… can be applied without using adhesives and installed practically year round. Qualifies for the same guarantee length as an adhered system.*

  • Adhered Application… can be installed with EverGuard® 1121 Bonding Adhesive (solvent-based), EverGuard® Low VOC Adhesive, or EverGuard® WB181 Bonding Adhesive (water-based) for the smoothest appearance. Provides superior wind uplift performance.



Field fabrication of TPO accessories is time-consuming, costly, and inconsistent, and can lead to unreliable details that compromise a watertight roofing system. EverGuard® TPO prefabricated accessories deliver consistent quality and eliminate the worry and problems often associated with field fabrication. They can also boost productivity up to 200%,** while reducing installed cost by up to 12%.



GAF’s sustainability credentials include:

  • NSF/ANSI 347 — Providing architects and contractors with a certified sustainable option for single-ply roofing membranes

  • UL Landfill Waste Diversion Validation — Zero Waste to Landfill (Mt. Vernon TPO Plant)

  • HPDs — Only single-ply roofing manufacturer that publishes Health Product Declarations (HPDs) for transparent reporting and LEED® v4 compliance

  • EPDs — Publishes Environmental Product Declarations (EPDs) for Single-Ply Roofing Membranes

TPO-Thermoplastic Polyolefin

tpo - 1

TPO and Steep Slope combined


Liberty Mineral Surface Roll Roofing

LIBERTY SBS Self-Adhering Roofing System

Protect Your Low-Slope Roof And Use No Special Tools When Installing A Self-Adhering Roofing System

A Self-Adhering Roofing System will provide long-lasting protection for the low-slope areas of your property without the danger or hassles associated with the installation of other conventional roofing products.

LIBERTY™ Roofing Systems are applied without torches, open flames, hot asphalt, or messy solvent-based adhesives. Unlike traditional roofing systems, they can be installed easily and quickly by a small roofing crew, without the hassles of bulky equipment or unpleasant odors.

Good Housekeeping

The LIBERTY™ SBS Self-Adhering Roofing System has earned the prestigious Good Housekeeping Seal, which means that Good Housekeeping stands behind the products in this system. (Refer to Good Housekeeping Magazine for its consumer protection policy. Applicable in U.S. only.) (See Details)

Owner’s Best Choice

  • Safer For Your Building…
    Self-adhering membrane systems eliminate the need for open flames on your roof
  • No Fumes…
    Unlike conventionally applied systems, eliminates the fumes and odors caused by hot asphalt or solvent-based adhesives
  • Proven Technology…
    Based on the same technology used in GAF’s commercial modified bitumen roofing systems – proven in the field for decades!
  • Great Warranty…
    Free ltd. system warranty against material defects for up to 15 years*
  • Extended Guarantees Available…
    Optional full-system guarantees against manufacturing defects and workmanship errors available for up to 20 years**
  • Peace Of Mind…
    Backed by GAF, North America’s largest roofing manufacturer
  • Seven Popular Colors…
    To complement your Timberline® Shingles or other residential
    shingle roof

*See LIBERTY™ Limited Warranty on SBS Materials for complete coverage and restrictions.
** See System Pledge™ Roof Guarantee and RUBEROID®/GAFGLAS® Diamond Pledge™ NDL Roof Guarantee for complete coverage and restrictions.

Professional’s Best Choice

  • Safer For Your Installers… 
    No torches, kettles, or dangerous chemicals – may even reduce your insurance premiums!
  • Quicker Installation…
    Often 1/3 faster than conventional systems, with minimal set-up or clean-up time
  • No Extra Tools…
    No need to stage expensive equipment
  • Proven Technology…
    Based on the same technology as GAF’s RUBEROID® SBS modified bitumen membranes
  • Flexible Installation Options

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