Search  for anything...
SIPA

SIPA 100 GSM Synthetic Waterproof Roof Underlayment 48” x 250' (1)

  • Based on 102 reviews
Condition: New
Checking for the best price...
$78.98 Why this price?
Save $81.01 was $159.99

Buy Now, Pay Later

As low as $13.16 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 11
Order within 23 hours and 15 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Item Package Quantity: 1


Features

  • covers 1,000 square feet, 100GSM
  • [Waterproof Protection]: Synthetic membrane offers strong water resistance to protect roof decking before and during installation of the final roof covering.
  • [Standards & Approvals]: Meets/exceeds ASTM D4869 & ASTM D226 performance specifications and is TDI/FBC approved
  • [UV Resistance]: Can withstand UV exposure for up to 60 days, allowing flexibility in installation scheduling.
  • [Broad Use]: Suitable for both commercial and residential rooftops and compatible with asphalt shingle and metal roof systems.
  • [Tools & Materials Youll Need]: Fastening-Hammer or Roofing Nailer, Roofing Nails with Plastic Caps or Cap Staples

Description

SIPA Synthetic Roofing Underlayment 100 GSM is a lightweight synthetic roof underayment designed to enhance the life of a roof system through superior water resistance and UV protection Coil layer is waterproof layer and anti- aging layer, fluctuation two sides is to enhance blinding layer, firm, and reliable, does not have become warped edge, no empty drum, double waterproof, is a new type of waterproof materials. Benefits of 100 GSM Unique Non-Woven Top Surface Fabric Allows For Enhanced Traction Water Resistant Performance Characteristics Exceed ASTM D4533 & D226

Manufacturer: ‎XIJIA LTD GROUP


Item Weight: ‎19.71 pounds


Product Dimensions: ‎48 x 4 x 4 inches


Item model number: ‎D4533


Color: ‎Gray


Material: ‎non woven PP laminated with PE plus 4% UV and water resistant adhesive


Item Package Quantity: ‎1


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: November 23, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Good quality waterproofing
Item Package Quantity: 1
Used under the asphalt shingles on my chicken coop. It went down very well. It stayed in place and so far I've had no issues with leaks. It was a least expensive option compared to doing water and ice shield. It went on very easily for installation and I do think the thickness is good and it should hold up ... show more
Reviewed in the United States on December 10, 2025 by Tarcy
    • Modern replacement for old-fashioned tar paper
Item Package Quantity: 1
I finally completed the roof on my cabin, and I have to say I am very happy with this stuff for ease of application and use. I installed this underlayment with special 3/4" long plastic-capped electo-galvanized ring-shanked nails from Best Materials, and laid Owens Corning Duration Château Green architectural shingles from Home Depot over it, nailed in by hand with ordinary 7/8" roofing nails which I had purchased as bulk unused surplus on eBay. Very hard work, but a little bit at a time, what you see is what you get on the roof, and it will all settle down and be pressed very flat under a heavy weight of snow. I plan to use the remainder of the roll for house wrap under the siding. ... show more
Reviewed in the United States on October 17, 2025 by Anon1
    • Used it on my Shed 8x20
Item Package Quantity: 1
Works well, quality is good, does not rip easily, it's not slippery when I was stepping on it while on roof. But use roofing shoes, step on those plastic nail caps.
Reviewed in the United States on June 3, 2025 by MarkS4
    • Like the handle coming apart for storage
Item Package Quantity: 1
Good for light scraping
Reviewed in the United States on September 19, 2025 by Cecil Hathorn
    • Priced right
Item Package Quantity: 1
Priced right and easy to install. Not sure how long it will last.
Reviewed in the United States on October 5, 2025 by Jeff Quade
    • Just ok
Item Package Quantity: 1
Not what I expected but will work
Reviewed in the United States on August 3, 2025 by David Young
    • It works good I re
Item Package Quantity: 1
It works good
Reviewed in the United States on November 14, 2025 by Brian Bennett
    • Love it! Waterproof. Lightweight, tough material.
Item Package Quantity: 1
The media could not be loaded. Love this Sipa roof underlay material. Waterproof and easy to install.
Reviewed in the United States on June 23, 2025 by UnoMasToMas

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...