Granulated peel-and-stick ice & water barrier roll

Owens Corning WeatherLock G is a granulated, self-sealing ice and water leak barrier that helps create a waterproof secondary layer of defense in the most vulnerable parts of a roof. The peel-and-stick, self-adhered design seals around nail penetrations, while the granulated surface improves traction during installation.

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Key Features:

• Waterproof Leak Barrier Protection: Acts as a secondary waterproof barrier to help protect against leaks from storms, wind-driven rain, and ice dams.
• Self-Sealing Nail Penetration Seal: Self-adhered membrane seals around fasteners for dependable, watertight construction under shingles.
• Safer Installation Traction: Granulated, slip-resistant surface provides better footing during install.
• Durable, Tear-Resistant Build: Engineered for excellent tear resistance to help resist cracking and breaking during installation.
• Easy Positioning & Course-to-Course Seal: Split-release liner simplifies application and the taped selvedge edge improves the seal between courses.

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Brand	Owens Corning
Product name/line	WeatherLock G
Product type	Ice and Water Barrier
Underlayment/Barrier type	Leak Barrier
Coverage area	200 sq ft (2 squares) per roll
Roll size	3 ft x 66.7 ft
Overall width	3 ft (36 in)
Overall length	66.7 ft
Product thickness	.053 in
Application method	Peel & Stick / Self Adhered
Material	Asphalt
Color family	Black
Surface type	Granulated, slip-resistant surface
Resistance features	Secondary waterproof barrier; slip-resistant; tear resistance; UL 790 (Class A fire resistance)
Fire rating (UL 790)	Class A
Listing agency standards	ASTM D1970; UL 790; ASTM E108; ICC-ESR 1783
Installation features	Split-release liner for easier application/positioning; taped selvedge edge improves seal between courses
Designed for roofing types	Asphalt shingles; wood shakes; quarry slate roofs
Performance notes	Seals around nail penetrations when top shingles are applied; withstands UV exposure for up to 45 days

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Frequently Asked Questions (FAQ):

Q: Where should WeatherLock G be installed on a roof?
A: It’s commonly used on vulnerable areas such as eaves, rakes, and valleys, and can also be used for full roof deck coverage when specified.

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Q: How much area does one roll cover?
A: One 3 ft x 66.7 ft roll covers approximately 200 sq ft (2 squares).

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Q: Does it seal around roofing nails?
A: Yes—once installed, it adheres to the roof deck and seals around nail penetrations when shingles are applied to help create watertight protection.

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Q: What roofing types is it designed for?
A: It’s designed for asphalt shingles, wood shakes, and quarry slate roof assemblies.

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Q: How is it installed?
A: It’s a peel-and-stick, self-adhered membrane with a split-release liner to help with application and positioning.

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Quiet Confidence, Built Into the Roofline

There’s a certain luxury to what you don’t see—layers that quietly do the heavy lifting while the home remains serene and protected. WeatherLock G brings that elevated assurance with a granulated, slip-resistant surface and a self-sealing, peel-and-stick barrier that wraps vulnerable roof lines in a watertight embrace. Use it at eaves and valleys where architecture meets weather, and let its refined, engineered performance support the beauty above. It’s the kind of invisible essential that makes a home feel truly considered—inside and out.

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Add WeatherLock G to your roofing system for a tougher, self-sealing leak barrier where your roof needs protection most.

Warranty

Installation