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GAF M-Curb Round Pitch Pocket System 7-1/2 in. Black
Regular price $118.00Orders start at $399 — combine any items to reach the minimum. Learn more
GAF M-Curb Round Pitch Pocket System 7-1/2 in. Black
The GAF M-Curb Round Pitch Pocket System is a 7-1/2 in. black curb that forms a watertight seal around difficult roof penetrations on asphaltic roofing systems. The sell unit is one box containing the M-Curb Round; it is bonded to the roof with M-Bond Sealant and filled with M-Thane Two-Part Pourable Sealant (each sold separately).
Key Features:
- Watertight penetrations: Forms a pitch pocket that provides a watertight seal for difficult roof penetrations on asphaltic systems.
- Durable curb: The M-Curb Round is a durable curb that encloses the penetration by forming the pitch pocket.
- No flashing needed: M-Curb Systems require no flashing and bond easily to most common roofing materials.
- Broad adhesion: M-Bond Adhesive/Sealant is a moisture-curing polyether sealant that bonds to asphaltic membranes, concrete, steel, aluminum, wood, glass, and PVC.
- 2 in. sealant fill: The curb is filled with a 2 in. (51 mm) thick seal of M-Thane Two-Part Pourable Sealant (Black) or M-Bond Adhesive/Sealant.
- Black finish: Supplied in black to blend with typical asphaltic commercial roof surfaces.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Sell unit | 1 box |
| Product line | M-Curb Round Pitch Pocket System |
| Available colors | Black |
| Available sizes | 7-1/2 in. |
| Nominal size | 7-1/2 in. round |
| Color / finish | Black |
| Material | Durable curb material for asphaltic roof systems |
| Fill depth | 2 in. (51 mm) pourable sealant fill |
| Intended use | Watertight sealing of roof penetrations on asphaltic roofing systems |
| Flashing required | No flashing required |
| Assembly | Bond curb to roof with M-Bond Sealant, then fill with 2 in. of M-Thane Two-Part Pourable Sealant (Black) or M-Bond Adhesive/Sealant |
Coverage & How Much You Need:
One M-Curb Round encloses a single roof penetration, forming one pitch pocket; size the curb to the penetration diameter and membrane system.
Fit and Compatibility:
Designed for use on asphaltic roofing systems and bonds to most common roofing materials via M-Bond Sealant. M-Bond Sealant and M-Thane Two-Part Pourable Sealant are required to complete the assembly and are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included with this item?
A: One 7-1/2 in. black M-Curb Round, sold by the box. The M-Bond Sealant and pourable sealant needed to complete the pocket are sold separately.
Q: Does it need flashing?
A: No. GAF states M-Curb Systems require no flashing and bond directly to most common roofing materials.
Q: How is the pitch pocket completed?
A: Bond the round to the roof surface with M-Bond Sealant, then fill with a 2 in. thick seal of M-Thane Two-Part Pourable Sealant (Black) or M-Bond Adhesive/Sealant.
Q: What surfaces does the sealant bond to?
A: M-Bond is a moisture-curing polyether sealant that bonds to asphaltic membranes, concrete, steel, aluminum, wood, glass, and PVC.
Q: What roof types is it for?
A: It is designed for use on asphaltic systems, providing a watertight seal for difficult roof penetrations.
Q: What size penetration does it fit?
A: This variant is the 7-1/2 in. round; verify the curb diameter suits your penetration before ordering.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Pitch pockets are the last line of defense at irregular penetrations, so the curb diameter should closely match the penetration to minimize the sealant fill. GAF's two-step approach—bonding the round with M-Bond and pouring a 2 in. seal of M-Thane—removes the need for custom sheet-metal flashing on asphaltic systems. Keep compatible GAF sealants on hand so the pocket can be completed in one visit, and verify the system's requirements for penetration size limits before installation.
Follow the roofing system manufacturer's details and safety practices when working on commercial roofs, and use sealants in accordance with their instructions.
Seal difficult roof penetrations with the GAF M-Curb Round Pitch Pocket System.
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