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 Sep 21 - Sep 26

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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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4.3 ★★★★★
Based on 29 reviews
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Marilyn Mann
Whiting, US
★★★★★ 1
sizing is way off
Size: 3X-Large
I ordered 3XL and they were more like a medium.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
M
Verified Purchase
Megan
Dallas, US
★★★★★ 5
READ then buy!!! ♥️
Size: Large, Size: Large
READ: I bought these because they say %100 cotton! I couldn't find another pair on here that said that. Now the reviews for these underwear are terrible. But I am super impressed with them! I am very picky down there, so I had to write this review to hopefully help others out there looking for %100 cotton underwear! 1.) Buy a size up! I am a medium normally, so I bought a large. This is because cotton shrinks! 2.) Right out of the bag, these dont feel nice, but thats why you NEED to wash them first! Right after a wash they felt extremely soft and comfy! 3.) They are total granny panties but they are perfect! I am young, and I can still rock them haha. I will be buying another set!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2026
B
Verified Purchase
Becky Leach
Battle Creek, US
★★★★★ 3
Run small
Size: 3X-Large
I even went up a size and they were still quite uncomfortable due to being too small. They just plain didn’t fit so you might wanna go up a couple of sizes
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
T
Verified Purchase
ThinGinn35
Lexington, US
★★★★★ 5
Who knew!?
Size: 3X-Large
I have problems with elastic around my legs so I looked for underwear without the elastic and found these. Okay, not the best look for “date night” but the itchiness is gone when I wear these underwear. I consider it a miracle! Date night will just have to be à la cart.
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Reviewed in the United States on May 14, 2026
N
Verified Purchase
Nikolaus
Dallas, US
★★★★★ 4
Lil tight
Size: 3X-Large
Def purchase a size above what you normally wear. I unfortunately could not go any higher of a size. Its more of a snug fit, somewhat stretchy, but the fabric is soft and feels great. If the size was just a lil bit bigger these would be perfect. But they feel good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026

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