Moisture-Cure Pourable Sealant requires no mixing.

Press Release Summary:

Designed for use with M-Curb™ Pitch-Pan System in built-up and modified bitumen roof systems, M-Thane™ One-Part Pourable Sealant can be applied in damp and cold as well as dry climates. Polyether sealant is solvent-free with less than 25 g/l VOC and does not outgas or bubble up on damp surfaces. Made up of 100% solids, self-leveling product will not shrink and can be applied at temperatures as low as 30°F. Sealant has 20-min skin-over time and is paintable within 24 hr.

Original Press Release:

GAF Introduces M-THANE(TM) One-Part Pourable Sealant

PARSIPPANY, NJ — GAF is proud to introduce an improvement to its M-Curb System for pitch pans, offering an innovative moisture-cure polyether solution that requires no mixing, a resealable container, less waste, and better elongation than similar products.

GAF’s M-Thane™ One-Part Pourable Sealant is a moisture cure polyether sealant designed for use with the M-Curb™ Pitch-Pan System in built-up and modified bitumen roof systems. With no mixing required, contractors can more quickly and efficiently apply the product, saving valuable time and money, while creating less waste. Since moisture-cure sealants cure with moisture in the air, it is suitable for application in damp and cold as well as dry climates. It also offers excellent adhesion to most construction materials and accommodates greater movement than typical urethane sealants.

M-Thane™ One-Part Pourable Sealant is solvent-free with less than 25g/I VOC and does not “outgas” or bubble up on damp surfaces as urethane sealants can. Made up of 100% solids, it will not shrink. It can be applied at temperatures as low as 30°F (-1°C), and is self-leveling, providing a smooth, professional look. The product has a 20-minute skin-over time and is paintable within 24 hours.

“Our new M-Thane™ One-Part Pourable Sealant saves contractors time and money. You no longer have to spend time mixing and there is less waste than a two-part product. You can re-seal the tube by simply placing the cut off tip back into the nozzle. If sealed properly the tube can last for months,” stated Lee Martucci, product manager at GAF.

M-Thane™ One-Part Pourable Sealant conforms to OTC, CARB, and SCAQMD regulations; contributes to LEED® v2009 New Construction & Major Renovations IEQ Credit 4.1: Low-Emitting Materials-Adhesives and Sealants; and secures 5 Global Impact Points as part of the NAHB Model Green Home Building Guidelines.

To learn more about GAF, visit

About GAF

Founded in 1886, GAF is the largest roofing manufacturer in North America. The company’s products include a comprehensive portfolio of steep-slope and commercial roofing systems, which are supported by an extensive national network of factory-certified contractors. Its success is driven by its commitment to Advanced Quality, Industry Expertise, and Solutions Made Simple. GAF was the first roofing manufacturer to offer a Lifetime limited warranty on all of its laminated shingles, which then evolved with the introduction of the GAF Lifetime Roofing System by extending the Lifetime coverage beyond just the roofing shingles.

With a focus on social responsibility, GAF developed Advanced Protection® Shingle Technology, providing superior durability and wind resistance while reducing the use of natural resources. The company also developed single-ply and asphaltic roofing membranes with superior durability and high reflectivity to meet the most rigorous industry standards while helping commercial property owners and designers reduce energy consumption.

GAF also supports the roofing industry through CARE, the Center for the Advancement of Roofing Excellence, which has provided education to over 125,000 professionals. CARE’s mission is to help professional contractors and distributors build their businesses through sales and management education, and to provide product and installation training to contractors, distributors, architects, property owners, and related industry personnel. For more information about GAF, visit

Alyssa Hall

Director of Marketing Communications

1 Campus Drive

Parsippany, NJ 07054

(P) 973-628-3301

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