Model # 3732920

Internet #100031926

Store SKU #561398

GAF Liberty 39-3/8 in. x 34 ft. (112 sq. ft.) SBS Self-Adhering Cap Sheet in White


Liberty 39-3/8 in. x 34 ft. (112 sq. ft.) SBS Self-Adhering Cap Sheet in White

  • Self-adhering membrane is easy to install
  • No special tools required
  • Up to 15 year limited material warranty

Frequently Bought Together

Product Overview

Liberty SBS Self-Adhering Cap Sheet is a durable, modified bitumen membrane designed and manufactured to meet industry and code requirements. The product is designed for use as a waterproofing membrane and is reinforced with a polyester mat, which is coated with a polymer-modified asphalt. Liberty systems are applied without torches, open flames, hot asphalt, or messy solvent-based adhesives and are suitable for primed plywood decks and many other substrates.

California residents: see   Proposition 65 information

  • Eliminates the fumes and odors caused by hot asphalt or solvent-based adhesives
  • Requires minimal setup and cleanup for quick installation
  • ASTM D6164 - type I, grade G
  • FM approved
  • UL classified
  • Miami - Dade county product control approved

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Is this suitable for a flat roof?

Example: I have looked at the manual and can't figure out what I did wrong.
Asked by: Kenny
Dear Kenny, Liberty is best used on low slope roofs 1/2-inch to 6-inch per foot incline. Please call our technical team at 877-GAF-ROOF (877-423-7663), Option 5 with any other questions. They'll be happy to help!
Answered by: GAFProductExpert
Date published: 2017-01-04

Home Depot doesn't seem to carry a primer. Will an asphalt sealer work as a primer?

Asked by: Scot
Dear Scot, our technical team is happy to help recommend a suitable base coat to use under Liberty SBS Cap Sheet. Please contact our technical team direct at 877-GAF-ROOF (877-423-7663), Option 5.
Answered by: GAFProductExpert
Date published: 2016-08-02

I can't seem to find the correct Liberty base sa membrane sheet to install under this cap sheet. ...

I can't seem to find the correct Liberty base sa membrane sheet to install under this cap sheet. Is not available from home depot per the web site. Someone at Home Depot recommended me to use the Liberty stormguard product as a base, but I verified with GAF that stormguard is not compatible with the Liberty line as it will not adhere correctly and not designed for a flat roof. Is Home Depot aware of this? Will the full Liberty roofing system be available from Home Depot soon?
Asked by: DS
Thank you for your recent inquiry with The Home Depot, DS. We carry a Tri-Ply 3 ft. x 98 ft. (300 sq. ft.) #75 Base Sheet that will work with this cap sheet. It is only carried in select Home Depot Stores and is not available on You can view the item here: If it is not carried in your local area, a specialist at the Service Desk in your local store may be able to special order it for you. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2017-06-20

Why doesn't Home Depot carry this item in my area 33175?

Why doesn't Home Depot carry this item in my area 33175?
Asked by: BC
Thank you for your interest in Liberty Self-Adhering Cap Sheet. Please visit or contact your local Home Depot Pro Desk Associate for product availability. They’ll be able to assist.
Answered by: GAFProductExpert
Date published: 2017-01-12
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Customer Reviews

Liberty 39-3/8 in. x 34 ft. (112 sq. ft.) SBS Self-Adhering Cap Sheet in White is rated 3.8 out of 5 by 4.
Rated 5 out of 5 by from Good product. Good price. I have been a remodeling contractor for over 30 years, and watched as roofing products have evolved. In particular, the products for flat roofs have really improved. Where i live, in Michigan, summers are hot and we have snow in the winter. This product is a peel and stick. Skip the base sheet. It isn't needed. Don't worry about the warranty. You will get 20 plus years out of this roof. It is a modified rubber, asphalt. This means that it flexes and won't crack like plain asphalt. It is a bit tricky to apply if very hot. It gets very sticky when hot!. get someone to help that knows what they are doing. I have used this on dozens of roofs for over 10 years and had no problems or failures. good luck with your project.
Date published: 2013-09-10
Rated 5 out of 5 by from The Perfect Wrap This product is designed for a low pitches roof. The white stone reflects the light and does not heat like a darker surface. The sticky back is really sticky. The cost per square is beautiful. Roof leak patched quite simply. Shingles on a low pitch roof do not drain properly. No more leak. Thank You.
Date published: 2016-09-21
Rated 4 out of 5 by from Not the best time I have ever had!!!! I like the finished product. It was fairly easy to install with the exception of removing the release sheets. The base sheet I received was in a box that was torn and taped up with duct tape; when I tried to remove the plastic from the adhesive it did not come off smoothly as was demonstrated by a video I watched on the GAF web site. The plastic sheet would pull easily for a foot or so and then I would encounter a 6" to 1' area that did not release so easily. The first piece of base I installed was 16' and required about 10 minutes to remove the plastic. A call to GAF customer service resulted in the advice "return it to where you bought it". The cap sheet had the opposite problem, the plastic release sheets did not want to stay in place, especially on the selvege area. With two pieces of the cap sheet I had to cover the selvege with release plastic I removed from pre3vious sheets. My advice concerning this product line is that you inspect every box to be certain it is new and has not been mishandeled before you purchase. At my local Home Depot the boxes of new product were on shelves above the floor while beaten, battered and obviouslt returned boxes were on the floor. I am certrain the problems I had with the base sheet was due to mishandling prior to my purchase, the cap sheet problems I experienced I believe are due to product flaws on the part of GAF.
Date published: 2013-11-03
Rated 1 out of 5 by from Half a loaf I bought a roll of Liberty Cap Sheet at Home Depot last Sunday. On further investigation I guess I also need Liberty Base Sheet, which Home Depot does not carry. It seems inappropriate that Home Depot would sell only half the Liberty system. I’ll bet if I had a warranty claim for just putting on the Cap Sheet I’d not get too far. I just spoke with the GAF Technical Department. They say that just putting the Cap Sheet on plywood deck would last all of 5 years, but with the Base Sheet I would get maybe 10 years. I don’t consider either to be “long lasting” as your literature and as Home Depot claims in its Product Overview for the Cap Sheet. I plan to return the Cap Sheet to Home Depot. I suggest that at a minimum Home Depot carry the complete Liberty System, along with full disclosure of the product limitations.
Date published: 2013-08-13
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