GAF M-Thane One-Part Pourable Sealant 28 oz Cartridge, Black

This is GAF M-Thane One-Part Pourable Sealant, a moisture-cure, self-leveling elastomeric sealant supplied in a 28 oz cartridge in black. One cartridge is the sell unit; cartons contain 12 cartridges. It pairs with GAF M-Curb pitch pocket components for penetration seals on asphaltic roof systems.

Key Features:

• Self-Leveling: Moisture-cure, self-leveling sealant suitable for application in damp, cold, and dry climates.
• No Mixing Needed: One-part formula requires no mixing and is solvent-free.
• 100% Solids: Contains 100% solids with less than 25 g/L VOC.
• No Shrinkage: Will not shrink upon curing and does not outgas or bubble on damp surfaces like urethane sealants can.
• High Movement: Low-durometer elastomeric formulation accommodates greater movement in penetration seals than typical urethane sealants.
• Broad Adhesion: Has excellent adhesion to most construction materials.
• Low-VOC Compliance: Meets OTC standards and California regulations (CARB, BAAQMD, SCAQMD) and contributes to LEED and NAHB documentation.

Specifications Table:

Coverage & How Much You Need:

One 28-oz cartridge fills pitch pockets and penetration seals; quantity needed depends on pocket size and fill depth specified in GAF's data sheet.

Fit and Compatibility:

Designed for use with GAF M-Curb Pitch Pocket components and M-Bond adhesive/sealant on asphaltic, built-up, and modified bitumen roof systems. M-Curb systems require no flashing and bond to most common roofing materials.

Frequently Asked Questions (FAQ):

Q: What is included with the purchase?
A: One 28 oz black cartridge of GAF M-Thane One-Part Pourable Sealant; full cartons contain 12 cartridges.

Q: Do I need to mix this sealant?
A: No, it is a one-part, moisture-cure formula that requires no mixing.

Q: Can it be applied in damp or cold weather?
A: Yes, it is suitable for application in damp and cold climates as well as dry climates, and it will not outgas or bubble on damp surfaces.

Q: How long until it is water-tight?
A: GAF's M-Curb system guidance indicates sealant is typically tack-free and water-tight in about 30 minutes to one hour, depending on outside weather conditions.

Q: What does it adhere to?
A: It is elastomeric with excellent adhesion to most construction materials; M-Bond is used to bond curb components to the membrane and penetration.

Q: How many cartridges come in a carton?
A: Each box and carton contains 12 cartridges.

Expert Verdict — Reviewed by the SuperArbor Pro Desk

Choose M-Thane One-Part when you want a no-mix, low-VOC pourable sealant for penetration pockets on asphaltic systems. Allow at least 1 in. clearance inside the curb to the penetration and follow GAF's data sheet for fill depth and priming with M-Bond. Because it is low-durometer, it handles penetration movement better than standard urethanes, making it the better pick around pipe clusters and irregular penetrations.

Wear gloves and eye protection when dispensing sealant, and follow the product data sheet and local code for roof penetration sealing.

Order the GAF M-Thane One-Part Pourable Sealant 28 oz black cartridge for watertight penetration sealing.