SKU: 19385118000

GAF Master Flow Storm Collar, 4 in., 28 Gauge, Mill Finish (SMC4)

Sale price$9.30 Regular price$10.33
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

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

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 19385118000

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4.7 ★★★★★
Based on 6 reviews
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M
Verified Purchase
Mr. S.
Bozeman, US
★★★★★ 5
Comfortable, Great Fit, and Perfect for Cooler Days
Color: Navy Heather, Size: Large
I bought this in January 2026 and have been really happy with it. The fit was as expected, which is always a big plus when ordering clothes online, and it feels comfortable right out of the package. What I like most is that it’s nice to wear when the weather is a little cooler, but it doesn’t feel too heavy or too hot. It works well as a light layer and has been a good option for those in-between days when you want something with long sleeves but don’t want a thick sweatshirt. It also looks good when wearing it, which makes it easy to use for more than just workouts or casual lounging. The overall style is clean, and it has a nice look without trying too hard. Overall, this has been a great purchase. If you want a comfortable quarter-zip pullover that fits well, looks good, and works well in cooler weather without overheating, I’d definitely recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
C
Verified Purchase
Charles H. Pretti Jr.
Pawtucket, US
★★★★★ 5
Excellent Quality and Value
Color: Marina Blue Geo, Size: Large
The size is appropriate as is the fit. I like this garment a lot because it flexes with body movement. I golf in it and there is minimal restriction. On sale it is an excellent deal. It is both warm and comfortable.
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Reviewed in the United States on December 2, 2025
A
Verified Purchase
Art
Massapequa, US
★★★★★ 4
Nice Golf attire
Color: Grey Mist Heather, Size: X-Large
Solid material of pullover flexible and stylish…Highly recommend 6’0 240 and XL fits well. Big fan Maelreg Brand
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 5, 2025
R
Verified Purchase
ravens
Carnegie, US
★★★★★ 5
My new favorite 1/4 zip!
Color: Lavender Heather, Size: Small
Love this brand and have a lot of their apparel like shorts, polos, pants, and pullovers. This is now my favorite by Maelreg. Incredibly soft, great color selection, has some weight to it, and fleece lining provides warmth on cold winter days but not to the point of sweating and discomfort. Excellent fit too. I usually wear M but the S fits perfectly. Great deal right now as well at $19.99 for some colors in my size. Just wish they didn’t put brand name on back of collar. A logo would have been better or nothing at all. But not a dealbreaker. Purchased several of these now.
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Reviewed in the United States on January 28, 2025
C
Verified Purchase
Corbin
Carnegie, US
★★★★★ 5
Quality
Color: Black Heather, Size: X-Large
Great fit and very high quality for the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026

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