Diathon^® Roof Coating is a water-based acrylic top coat for spray polyurethane foam with excellent physical properties, durability, protection against the damaging effects of weather elements and UV rays. Diathon^® Roof Coating is a “breathable" coating, allowing moisture vapor to pass through the film while resisting mass water penetration.

Usages/Substrates: For use over sprayed polyurethane foam with GAF Diathon^® base coat.

Packaging Sizes:
5 gallon (19 liter) pail
55 gallon (208 liter) drum
275 gallon (1041 liter) tote

Standard Colors: White, Light Gray, Tan, and Light Tan

APPLICATION INSTRUCTIONS

Substrate Preparation: Roof must have positive drainage, and be clean and dry with no trapped moisture. Repair damaged SPF, flashings, and penetrations. For additional guidelines for SPF preparation refer to the Substrate Preparation Guide in the GAF Liquid-Applied Manual.

For previously coated SPF roofs, conduct test patches to verify adhesion of coating prior to start of work.

Mixing: Mix uniformly for a minimum of 3 minutes prior to use. Do NOT attempt to thin or self-tint.

Application: Apply by brush, roller, or airless sprayer evenly at the rates specified below. Do NOT apply more than 1.5 gallons per 100 ft² (6.1 L per 10 m²) in a single coat. Apply additional coats perpendicular to the previous coat once it is dry enough to walk on. Total coverage is dependent on the substrate. See data sheet for minimum coverage requirements.

STORAGE & SHELF LIFE

Product Storage Temperature: 50°F – 90°F (10°C – 32°C) Do NOT allow coating to freeze.

Shelf Life: 18 months from date of manufacture in unopened containers, if stored properly in a clean and well-ventilated area.

SAFETY & HANDLING

For specific information regarding safe handling of this material, please refer to the Safety Data Sheet (SDS).

LIMITATIONS & PRECAUTIONS

Application Air Temperature: Min. 50°F (10°C). Do NOT heat containers.

Application Surface Temperature: 50°F (10°C) and rising. Care should be taken when coating surfaces above 120°F.

Contact GAF Design Services if you have application questions.

Do NOT apply if rain, dew, fog, heavy moisture, condensation, or freezing temperatures are in the 8-hour forecast to ensure proper cure. Cool temperatures/high humidity may slow curing.

WARRANTY

Refer to applicable warranties and guarantees, available at gaf.com, for complete coverage and restrictions.