
GAF Master Flow Storm Collar, 4 in., 28 Gauge, Mill Finish (SMC4)
Master Flow 4 in. Storm Collar
Adjustable Master Flow storm collar designed to seal around vent pipes penetrating the roof. Crafted in 28-gauge mill-finish metal to help deflect rain, snow, and debris for reliable weather protection.
Key Features:
- Adjustable Fit: Conforms to various roof pitches for a tight seal around pipes
- Weather Protection: Helps prevent rain, snow, and debris from entering at pipe penetrations
- Durable Construction: 28-gauge metal in mill finish for long-lasting performance
- Easy Integration: Designed for 4 in. diameter vent pipes
- Roof Flashing Compatibility: Pairs with roof flashings to complete a secure vent penetration
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Product Name | MasterFlow Storm Collar |
| Model/Manufacturer Number | SMC4 |
| Product Number | GAFSMC4 |
| Diameter | 4 in. |
| Thickness | 28 Gauge |
| Finish/Color | Mill Finish |
| Style | Flashings |
| Unit of Measure | Each |
| Pieces per Carton | 6 |
| Item Weight | 0.8 lb |
| Intended Use | For use around pipes penetrating roofs to protect against rain, snow, and debris |
| Adjustability | Adjustable for various roof pitches |
Frequently Asked Questions (FAQ):
Q: What pipe size does this storm collar fit?
A: It is designed for 4 in. diameter vent pipes.
Q: Is the collar adjustable for different roof pitches?
A: Yes, it is adjustable to accommodate various roof pitches.
Q: What material and thickness is it made from?
A: It is 28-gauge metal with a mill finish.
Q: How is it used with roof flashings?
A: Install it above the flashing around the pipe and tighten to create a weather-resistant seal.
Q: Is hardware included?
A: A tightening mechanism is integrated on the collar; additional sealant may be used per local codes and best practices.
Sleek Utility That Seals the Skyline
This streamlined storm collar brings a crisp, architectural edge to the most functional part of the roofline. Its mill-finish sheen frames the vent with quiet confidence while the adjustable band cinches neatly to any pitch. Pair it with complementary galvanized flashings for a cohesive, professional look that disappears into the silhouette. It’s a subtle, indispensable detail that elevates durability to a luxury standard.
Choose this Master Flow 4 in. storm collar for a clean, weather-tight pipe penetration that lasts.
Original: $10.33
-70%$10.33
$3.10Product Information
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Description
Master Flow 4 in. Storm Collar
Adjustable Master Flow storm collar designed to seal around vent pipes penetrating the roof. Crafted in 28-gauge mill-finish metal to help deflect rain, snow, and debris for reliable weather protection.
Key Features:
- Adjustable Fit: Conforms to various roof pitches for a tight seal around pipes
- Weather Protection: Helps prevent rain, snow, and debris from entering at pipe penetrations
- Durable Construction: 28-gauge metal in mill finish for long-lasting performance
- Easy Integration: Designed for 4 in. diameter vent pipes
- Roof Flashing Compatibility: Pairs with roof flashings to complete a secure vent penetration
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Product Name | MasterFlow Storm Collar |
| Model/Manufacturer Number | SMC4 |
| Product Number | GAFSMC4 |
| Diameter | 4 in. |
| Thickness | 28 Gauge |
| Finish/Color | Mill Finish |
| Style | Flashings |
| Unit of Measure | Each |
| Pieces per Carton | 6 |
| Item Weight | 0.8 lb |
| Intended Use | For use around pipes penetrating roofs to protect against rain, snow, and debris |
| Adjustability | Adjustable for various roof pitches |
Frequently Asked Questions (FAQ):
Q: What pipe size does this storm collar fit?
A: It is designed for 4 in. diameter vent pipes.
Q: Is the collar adjustable for different roof pitches?
A: Yes, it is adjustable to accommodate various roof pitches.
Q: What material and thickness is it made from?
A: It is 28-gauge metal with a mill finish.
Q: How is it used with roof flashings?
A: Install it above the flashing around the pipe and tighten to create a weather-resistant seal.
Q: Is hardware included?
A: A tightening mechanism is integrated on the collar; additional sealant may be used per local codes and best practices.
Sleek Utility That Seals the Skyline
This streamlined storm collar brings a crisp, architectural edge to the most functional part of the roofline. Its mill-finish sheen frames the vent with quiet confidence while the adjustable band cinches neatly to any pitch. Pair it with complementary galvanized flashings for a cohesive, professional look that disappears into the silhouette. It’s a subtle, indispensable detail that elevates durability to a luxury standard.
Choose this Master Flow 4 in. storm collar for a clean, weather-tight pipe penetration that lasts.






















