SKU: 5939524023

GAF FeltBuster Synthetic Roof Underlayment, 48 in x 250 ft (1000 sq ft)

Sale price$84.89 Regular price$94.32
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

GAF FeltBuster Synthetic Roof Underlayment, 48 in x 250 ft (1000 sq ft)GAF FeltBuster Synthetic Roof Underlayment (48" x 250') GAF FeltBuster is a high traction synthetic roofing underlayment designed to protect decks beneath shingles. The durable polypropylene construction resists tearing and moisture while its medium gray surface stays cooler than traditional black felt for easier installation. Key Features: Enhanced Traction Surface: Special spunbond top layer improves walkability compared to typical asphalt felts

GAF FeltBuster Synthetic Roof Underlayment (48" x 250')

GAF FeltBuster is a high-traction synthetic roofing underlayment designed to protect decks beneath shingles. The durable polypropylene construction resists tearing and moisture while its medium-gray surface stays cooler than traditional black felt for easier installation.


Key Features:

  • Enhanced Traction Surface: Special spunbond top layer improves walkability compared to typical asphalt felts
  • Durable Synthetic Build: Non-asphaltic polypropylene resists tearing, moisture absorption, brittleness, and oil leaching
  • Cooler Working Surface: Medium-gray finish can be up to 30°F cooler than black felt for more comfortable installs
  • Lightweight, Wide Roll: 48-inch width and 10-square coverage per roll speeds application over large areas
  • Better Aesthetics: Lies flatter to reduce wrinkle telegraphing for a cleaner-looking roof

Specifications Table:

Specification Details
Series Name FeltBuster
Type Roof deck protection
Material Synthetic (Non-asphaltic polypropylene)
Application Method Nail
Underlayment Grade #30
Coverage Area 1000 sq ft
Length 250 ft
Width 48 in
Weight 23 lbs
Warranty Limited lifetime (when part of GAF Lifetime Roofing System)
For Use with Asphalt Shingles Yes
For Use with Metal Roofing No
For Use with Wood Shakes No
For Use with Flat Roofing Yes
Prop 65 Warning (CA) No
UNSPSC 30151500

Frequently Asked Questions (FAQ):

Q: Is FeltBuster waterproof?
A: No—it's water-resistant and intended as a secondary water-shedding layer beneath the primary roof covering.


Q: What roofing materials is it compatible with?
A: Designed for use under asphalt shingles; not intended for metal or wood shakes. Listed as suitable for flat roofing in specs.


Q: How is it installed?
A: Install with nails following printed fastening guides on the sheet; use as underlayment, not as a temporary roof.


Q: What is the coverage per roll?
A: Each 48 in x 250 ft roll covers 1,000 sq ft (10 squares).


Q: Does it come with a warranty?
A: Eligible for a Limited Lifetime Warranty when part of a GAF Lifetime Shingles roof, per GAF warranty terms.


A Sleek, High-Performance Base for Beautiful Rooflines

FeltBuster’s cool gray surface lays impeccably flat, creating a refined foundation that elevates any shingle pattern. I love the wide-format roll—it streamlines coverage and keeps seams clean for a polished silhouette. Pair it with dimensional shingles and crisp metal accents to highlight roof geometry. It’s a discreet essential that ensures a resilient, luxe finish from the very first layer.


Upgrade your roof’s first line of defense with GAF FeltBuster for durable, cooler, and easier installation performance.

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: 5939524023

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4.1 ★★★★★
Based on 14 reviews
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Verified Purchase
Jason Clinton
Pawtucket, US
★★★★★ 5
Wish I Had Used This Sooner – Stop Debating and Just Buy It!
Size: Powder Poli Ox - Pack of 6
Wish I Had Used This Sooner – Stop Debating and Just Buy It! After a lot of debate, extensive research, and way too many hours spent using other products trying to restore and protect my RV's fiberglass that never fully delivered the results I was after, I finally tried the Poli Glow Deluxe Kit—and I am extremely happy I did. My only regret is not using it sooner instead of letting other people's opinions talk me out of it. The 6-in-1 complete kit is the right way to tackle fiberglass restoration from start to finish—eliminating oxidation, restoring the shine, and then protecting it long term all in one comprehensive system. The difference in how my RV looks after going through the full Poli Glow process is genuinely impressive and far beyond what any single product or traditional buffing method I tried before could deliver. The oxidation came off cleanly, the restored shine is deep and glossy, and the long-lasting protection gives real peace of mind knowing the fiberglass is shielded from UV damage and the elements going forward—especially important in the brutal Las Vegas sun. For anyone who has been going back and forth on whether to invest in the full Poli Glow Deluxe Kit—stop debating, stop listening to everyone else's opinion, and just do it. The complete system delivers complete results, and I won't be using anything else on my RV going forward. Highest possible recommendation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
P
Verified Purchase
P. Eurice
Fort Morgan, US
★★★★★ 5
Great stuff.
Size: Powder Poli Ox - Pack of 6, Size: Powder Poli Ox - Pack of 6
My RV had moderate oxidation. I tried several polishes and waxes. Nothing worked well to make it shine out lasted long. I applied poly glow a week ago. It is easy to apply and made my RV shine like new. So far I love Poly glow and if it lasts anywhere a long as they say, I will continue to use it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
A
Verified Purchase
Amazon Customer
Belleville, US
★★★★★ 5
It Works!!!!!
Size: Powder Poli Ox - Pack of 6
We have only completed the first two steps it Poly Glo set we purchased and has it ever made a difference in the look of our hauler/trailer! The dull oxidize black color is somewhat shiny. Cant wait to put the final two steps on it! A little elbow grease and work did wonders! We will share a photo once the procedure is complete!
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Reviewed in the United States on May 19, 2026
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 4
Could be good
Size: Powder Poli Ox - Pack of 6
I cleaned my RV very thorough from top to bottom before even starting the process with the Poli Glow system. Here's what I learned despite videos and lots of reading reviews. 1. Must be very clean and clear of anything you dont want to stick and show on your final outcome. 2. It takes more coats than you think it would (after 3 coats) it was still really streaky and I was starting to regret using Poli Glow. I ended around 7-8 coats and my rig had no major oxidation at all. 3. As one reviewer said, use a clean microfiber cloth v the applicator that comes with it, I found much better results with no lines. 4. Dont go to heavy on the coating, the instructions say this, but I went super light and it can be very easy to get lines with heavier application. 5. Dont look at your work after 3 coats, you will feel deflated, just keep going for at least 6 coats and then look at your work. 6. Only do small areas and look out for drips and lines, you need to get them out right away. 7. I did not use the Poli Ox, I was able to get any oxidation out with just the Poli Prep 8. Going up and down a ladder for hours sucks! 9. I hope it will come off in the next couple of years when I plan to replace the decals. Honestly, thats my biggest fear is how hard it will be to remove when the time comes. 10. After a scary start, I will say it did turn out pretty nice, was it easy, nope, would I do it again? Not sure, I need some time for my back to heal up! If you do choose Poli Glow know there are other options that maybe a better way to go such as wet sanding etc. Poli Glow is pretty good, but it can be pretty bad also if the surface is not cleaned and the Poli Glow applied correctly.
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Reviewed in the United States on August 17, 2023
D
Verified Purchase
Derek Baloun
San Leandro, US
★★★★★ 5
Poli glow works!
Size: Powder Poli Ox - Pack of 6, Size: Powder Poli Ox - Pack of 6
Works amazing! After many attempts to buff I purchased Poli glow and done in less than half the time and beautiful result.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026

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