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 Nov 18 - Nov 23

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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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4.4 ★★★★★
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L
Verified Purchase
Louis G
Lexington, US
★★★★★ 5
Easy to install, very tough!
Color: White, Size: 16in, Color: White, Size: 16in
Seriously, scoring these shelf stands for $30 feels like an absolute steal! Four chunky wood boards with metal T-brackets that actually feel substantial - way sturdier than those flimsy IKEA ones I used to have. My old cheapo stands warped after half a year, but these hold up like a champ - I've got like 15 heavy textbooks stacked on them right now. Love the little details too: rounded edges so you won't scrape your hands, and rubber grip strips on the bottom. They look legit fancy in my living room as bookshelves and even class up my kitchen herb garden. My friend thought they were some high-end designer furniture! Honestly, the craftsmanship at this price puts my old $60 wooden shelves to shame. Already told my DIY group chat about these - trust me, you can't go wrong!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2025
C
Verified Purchase
Chad Collins
Carnegie, US
★★★★★ 4
Great look. Sturdy.
Color: Rustic Brwon, Size: 16in
Great look if you can get it installed. The sticker paper mounting guides rip so easy so he careful!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 4, 2025
L
Verified Purchase
Lisa Bulkilvish
Pawtucket, US
★★★★★ 1
Worst item ever
Color: White, Size: 16in
Set up shelves and not sturdy at all. Followed the instructions perfectly. Very poorly made. I don’t have the box and now I’m stuck with the item. Garbage can here it comes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
N
Verified Purchase
Nancy
Waukegan, US
★★★★★ 5
Shelves
Color: Rustic Brwon, Size: 16in
Love the quality but got the wrong color. Company was easy to work with in return. If you need shelving these are awesome
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
K
Verified Purchase
Kelly Cardenas
Boise, US
★★★★★ 3
There are better floating shelves
Color: Rustic Brwon, Size: 16in
Doesn’t feel very sturdy like other floating shelves I’ve bought, and they slant a little. The anchors and screws that it came with all broke so we had to get our own for it to feel more secure on the wall, but still feels wobbly. Overall, it looks good on the wall after the fact, but won’t be adding too much weight on it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026

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