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20 Mil Vapor Barrier, GuardianLiner™ 20 Mil Vapor Barrier, GuardianLiner™
12 Mil Vapor Barrier SilverBack 13'4"x50
12 Mil Vapor Barrier for Crawl Spaces, GuardianLiner™ 13'4x75'
Home>20 Mil Vapor Barriers
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20 Mil Vapor Barrier SilverBack™ 6.75"x100'

Part Number 20MSB-100
review 24 Review(s)
20 Mil Vapor Barrier SilverBack™ 6.75"x100'
3 Sizes Available- All are American Made
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Made in the USA-
Naturally resists Mold and Mildew
Bright white face/Silver Back
Additional discounts on a Dehumidifier if purchased with this vapor barrier
Super strong reinforcement makes tearing nearly impossible

20 Mil SilverBack™
Reinforced Vapor Barrier for Crawl Space Encapsulation

This vapor barrier actually measures 20 mil at the plastic, not the thread.
20 Mil Vapor Barrier SilverBack™ 6.75x100'

The top of the 20 Mil SilverBack™ is a brilliant white. This clean white color helps to reflect light in the crawl space and give it a pleasant appearance. The top layer is made from 100% virgin polyethylene resin to give the absolute best performance and last a lifetime.

The Middle-
The middle of the 20 Mil SilverBack™ houses the polyester thread reinforcement. This reinforcement has one job and that is to eliminate tearing. The grade of polyester cord is the same that is used in tires to keep the rubber stable at highway speeds. The reinforcement is permanently embedded in the vapor barrier with an additional layer of molten polyethylene. This insures the 20 Mil SilverBack will never delaminate.

The Back-
The back of this product is a silver color, which is the trademark of the SilverBack™ brand. Color additives do add cost to the product, but we view this cost as necessary to help homeowners and contractors know they are buying a genuine quality product. The back layer does not have pinholes or fillers and naturally resists mold and mildew. 

20 Mil SilverBack™ is thick enough and strong enough to allow for medium to heavy storage, heavily traveled areas and to cover stone/concrete floors. We still recommend the use of the Felt550™ if the floor has objects that are sharp and can not be removed.

The actual 20 Mil thickness of the 20 Mil SilverBack™is one of its strongest features. We measure actual thickness at the plastic, not the reinforcement thread like others do. See the video below to see how it is measured and compared to the competition.

The SilverBack™ 20 Mil vapor barrier weighs 109 pounds per 1000 square feet or 109 MSF. Compare that to the competitors 20 Mil @ 74 pounds per 1000 square feet. That's 35 pounds less plastic for the same money as the SilverBack™.

Use the 20 Mil SilverBack™ on the floor and the 12 Mil SilverBack™ on the walls to keep the costs inside the budget. 

20 Mil= .020 inches
Due to the expanding and rising UPS handling and shipping fees we are forced to add $9.28 at checkout for each roll.

Rating Homeowner
Heavy duty. I would recommend measuring and cutting the lengths you need before entering the crawlspace as the entire roll is heavy and difficult to maneuver in tight spaces. However the product itself is very durable and never tore during installation. Should last many many years.
  Reviewed by:   from Hendersonville. on 7/11/2017
Rating SilverBack vapor Barrier
This product was amazing!! Our crawl looks fabulous!!! The barrier material was very durable and easy to work with.
  Reviewed by:   from Prudenville. on 5/8/2017
Rating Excellent, excellent product
I cannot recommend this product enough. We installed it in our crawl space after the Colorado floods in 2013. After installing it, our crawl space has been warm and dry and we have had no mold issues. I was hesitant to use the foundation pins, but the person we talked to said we really needed them, and he was right. We were able to rent a pin gun from our local hardware store and the combo of the pins plus the caulking has held up extremely well. In this day and age of bad customer service and poor quality products that look good but don't deliver, it is nice to find a product that does what it says it will and exceeds your expectations. Highly recommend.
  Reviewed by:   from Colorado. on 8/11/2014
Rating Best Quality and Service
I absolutely love the vapor barrier plastic. I have done a lot of research about vapor barrier plastics before I made my purchase and your product is everything you advertised. The 20 Mil SilverBackô is the strongest plastic, even the handyman that I hired to install it said it was the best quality he had ever installed. He asked me for your address and said he would recommend this product to all his clients. Also, my order was filled very quickly and arrived in just a few days after I placed my order. Thank you! Great product and service!
  Reviewed by:   from Georgia. on 7/18/2014
Rating Very happy with product and support.
With rock hard chunks of clay and sharp pieces of concrete debris all around, anything less then 20mil would have been a disaster. If I had to do this job again, I would have gotten 2 six foot wide rolls rather then the 13 foot wide roll. The 13 foot width was very difficult for my brother and me to manage when your on your knees and belly.
  Reviewed by:   from North Georgia. on 4/19/2014
Rating Home Owner
I purchased the 20 Mil liner for my new construction crawl space and had it installed and then sealed to the walls by a reputable spray foam company. They and I are were impressed with the product. The crawl space has extremely low humidity since installation. The liner seems very durable. I am happy with the choice.
  Reviewed by:   from Beverly Hills MI. on 3/10/2014
Rating Easy to use, excellent quality
Wow, how happy am I that I purchased this product. Our basement now smells good, dry, and clean. Love how the white makes everything look clean.
  Reviewed by:   from Fort McMurray, Alberta. on 2/23/2014
Rating Tough
Easy to work with. Feels even better over felt liner. Cleans up well.
  Reviewed by:   from North Carolina. on 2/19/2014
Rating Excellent Materials and Advice
The items in this order were superb and did just what was needed as did all of the CrawlSpace materials. The encapsulation went well because the materials are excellent and the advice/directions were on target and very helpful. Also, the success was due to the staff at CrawlSpace Repair, their excellent advice, and the printed directions. I am a very pleased customer with the materials and service.
  Reviewed by:   from Virginia. on 1/15/2014
Rating Quality product
I wanted to install a high quality liner in my crawlspace that would not need to be replaced for many many years, if ever. The Silverback 20 mil liner was the perfect fit. When I had a couple installation questions the customer service was excellent. If you want a high quality product to protect your crawlspace I highly recommend this product.
  Reviewed by:   from Nantucket, MA. on 1/7/2014
Rating incapsulating the cral space
great sturdy strong product, fast to delivery highly recomanded
  Reviewed by:   from portland. on 1/6/2014
Rating Great Stuff
This plastic is the highest of quality . I used the twenty mil with felt and it has made a world of difference. I highly recommend this product and company.
  Reviewed by:   from Nebraska. on 12/8/2013
Rating Easy to Use
Products are fantastic and easy to use. My crawl space looks fantastic and clean. All the moisture from the Colorado flood that made its way upstairs is all calming down.
  Reviewed by:   from Colorado. on 12/3/2013
Rating Excellent, tough product
My son and I installed the 20MIL Silver Back vapor barrier in our 11x22 dirt floor crawlspace. The product is excellent and I couldn't be happier. The 20MIL liner is nice and thick and tough, so Rubbermaid tubs and boxes we store in the crawlspace scoot cross the liner with no problems and no chance of tearing the liner. I couldn't believe how fast it came! I ordered it online, the next day it was here! Would highly recommend it to anyone considering lining their crawlspace.
  Reviewed by:   from El Paso, IL. on 11/7/2013
Rating Good - Stuff
I installed this 20 mil SilverBack in a 24x26 crawl space. The results were great. You can't go wrong with this product. I expect it to last for many years. Buy it.
  Reviewed by:   from IOWA. on 10/12/2013
Rating Fantastic and Easy to Use
I used the 20 Mil and 12 Mil SilverBackô crawl space vapor barrier this weekend and the product is fantastic, easy to use, and arrived incredibly fast and undamaged. The Waterproof Seam Tape was also something I was glad I purchased. Thanks for making a great product!
  Reviewed by:   from Colorado. on 10/8/2013
Rating Great Product
The 20 mil vapor barrier was great, easy to work with and my customer was well pleased. I will use again because it exceeded my expectations in every way.
  Reviewed by:   from West Virginia. on 7/13/2013
Rating Exceeded Expectations
After spending 3 years researching for a quality crawl space vapor barrier for my cabin - I went with your 20 mil vapor barrier. The sales staff were very helpful, reviewing the products required, and giving installation advice. The installation went great and I could not be more pleased with the products. Bright white, no off gassing, no more musty smell from the crawl space. The product exceeded my expectations (and that almost never happens for me).
  Reviewed by:   from Washington. on 5/31/2013
Rating Very Satisfied
Our contractor has completed installation of the vapor barrier in our crawl space.....he was very satisfied with the components we purchased from you. Your membrane was clearly superior to materials available locally.
  Reviewed by:   from Maine. on 2/13/2013
Rating High Quality
The materials were of high quality and worked as advertised. I used the 20 mil SilverBack over 5100 felt.
  Reviewed by:   from Virginia. on 6/27/2012
Rating Great Products and Service
. I was greatly impressed with the quality of the materials. The vapor barrier, both the 12 mil and 20 mil material, was extremely tough and have proven to be very effective in the short time it has been down. It almost would take a deliberate act to perforate the 20 vapor barrier which I used in the area that receives the most traffic.
  Reviewed by:   from NC. on 1/2/2012
Rating I am glade I was able to find you on line.
The 20 mil silver back plastic vapor barrier was great. The quality of plastic was very high with no odor and extremely easy to work with. I was also very pleased with the sales staff. They are very knowledgeable and extremely helpful. Thanks again for the great service and material
  Reviewed by:   from NJ. on 12/27/2011
Rating Like working with this products.
20 mil is a good strong durable product
  Reviewed by:   from IN. on 12/2/2011
Rating Wonderful Product
I used this product on my walls and am very pleased with the product. I referred this product to friends.
  Reviewed by:   from VA. on 8/23/2011

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