Elastomeric Roofing - PVDF Coating



TOPCOAT® PVDF Coating is a water-based, spray-applied, Polyvinylidene fluoride-based reflective coating with exceptional dirt-repelling characteristics.

This product was designed to repel dirt build-up and staining from environmental factors that can diminish reflectance over time. Polyvinylidene fluoride is a well-established polymer additive that has been used in coating products for decades in both non-roofing and roofing applications. It offers excellent weatherability and resists mildew and can withstand extended exposure to a wide range of temperatures, ultraviolet rays, and atmospheric pollutants.

TOPCOAT® PVDF Coating is compatible with select water-based sealant and coating products, including TOPCOAT® Membrane and TOPCOAT® MB Plus coating products. It may be installed as a final coat in multicoat applications of compatible water-based product or in a multicoat PVDF coating application. See GAFs published TOPCOAT® application instructions for specifications and requirements.

TOPCOAT® PVDF coating is highly sensitive to substrate conditions, and all flashing materials and/or base coats MUST BE THOROUGHLY CURED/DRY, prior to the application of PVDF coating. Application to uncured or wet substrates will result in cracking.

While TOPCOAT® PVDF coating has demonstrated greater resistance to standing water than typical water-based coating, it is not warranted in applications where ponding water is present. TOPCOAT® PVDF Coating is available in white but custom tinting is available (minimum order requirement).


TOPCOAT® PVDF Coating is designed for use over galvanized metal roofing, BUR, TPO (TOPCOAT® TPO Red Primer required), and modified bitumen membranes (TOPCOAT® MB Plus base coats required over asphaltic surfaces to deter staining), and select TOPCOAT® water-based coatings. Substrate shall not experience consistent repeated standing and/or ponding water and must have positive drainage. Apply at temperatures above 42°F (5.56°C) and below 120°F (48.89°C). Keep material from freezing.

  • High reflectivity helps to reduce rooftop surface temperatures

  • TOPCOAT® PVDF polymer deters adhesion of dirt and dust particles that impact aged reflectivity

  • Compatible with other TOPCOAT® water-based coating products (see specifications for details)

  • Water based, less impact on the environment, easy to clean up

  • Extreme weatherablity/longevity

  • Mildew resistant

  • Shorter cure time than typical water-based coatings

  • Warranties available for up to 10 years*

  • Guarantees for up to 20 years*

  • Available in 5-gallon pails and 55-gallon drums, minimum order applies

Application Rate: 1.0 to 1.5 gallons per coat
Application Method: Airless sprayer, brush, or roller
Application Temp (air, surface); 42° - 120 °F
Drying Time (75°, 50%, RH): Approx 24 hours per coat (install over DRY substrates ONLY)
Enlongation: ASTM D2370 100%
Solids Content (by weight): 57% calculation via formulation
Viscosity (75°F): Brookfield (#6 spindle @ 10 rpm) 11,000 ~ 13,000 cps
Tensile Strength: ASTM D2370 > 200 psi
Unit Sizes: 5-gallon pail and 55-gallon drum
Weight Per 5-Gallon Pail, As Applicable: 63 lbs
Wet Adhesion on TOPCOAT®: ASTM C794 2 lbf/in
Water Absorption: ASTM D471 <5%
Water Vapor Permeance: ASTM D96 49 perms
Tear Resistance: ASTM D624 ~70-80 lbf/in
Coverage Rate: Airless spray 120 sq ft/gal
VOCs: <50 g/L
Initial Reflectivity**: 0.885

* See TOPCOAT® 10-Year Limited Warranty and the TOPCOAT® Diamond Pledge™ NDL Roof Guarantee for complete coverage and restrictions.

** Based on in-house testing

For application questions, please contact GAF Technical Services at 1-800-766-3411.

Note: Repair leaks promptly to avoid adverse effects, including mold growth.


All documents are U.S. English unless otherwise noted

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