Owens Corning WeatherLock Mat Self-Sealing Ice & Water Barrier Black 36" x 66' 5"

The Owens Corning WeatherLock Mat Self-Sealing Ice & Water Barrier Black 36" x 66' 5" is a ice & water underlayment for jobs that require Owens Corning model/MPN 867466 in the RL sell unit. WeatherLock Mat Self-Sealing Ice & Water Barrier is designed to act as an additional line of protection against damage due to shingle blow-offs, wind-driven rain and ice damming.

Key Specs

• Brand: Owens Corning
• Model / MPN: 867466
• SKU: OCFWLM2
• Sell unit: RL
• Product type: Ice & Water Underlayment
• Size / color: 36" x 66' 5"
• Category: Residential Roofing | Residential Roofing/Underlayment | Residential Roofing/Underlayment/Ice & Water Underlayment | Underlayment | Underlayment/Ice & Water Underlayment
• Coverage / unit: 2 squares (200 sq ft) per roll

Key Features

• SureStep Technology provides excellent traction to help protect crews against slipping
• Light weight - Easy to load, carry and install
• Versatile selvage edge design - Allows for faster installation

Coverage & How Much You Need

This item is listed as 2 squares (200 sq ft) per roll. Use the project takeoff, manufacturer installation instructions, and expected waste/overlap to confirm the order quantity.

Compatibility / Fitment

Use this item only when the brand, model/MPN, size/color, sell unit, and system type match the project specification. Do not substitute it for a different ice & water underlayment, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

Owens Corning WeatherLock Mat Self-Sealing Ice & Water Barrier Black 36" x 66' 5", sold as RL, with SKU OCFWLM2 and manufacturer model/MPN 867466.

What model or part number should I match?

Match model/MPN 867466 and confirm the brand is Owens Corning. If the job spec lists a different model, size, color, or system family, hold for review.

What unit is the price based on?

This listing is built around the RL sell unit. Confirm the unit before comparing price, quantity, or coverage.

How do I estimate quantity?

Use 2 squares (200 sq ft) per roll, then add waste or overlap per the manufacturer instructions and the project design.

What should be checked before purchase?

Confirm the model/MPN, sell unit, size/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.

Roofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.

Product Expert Notes

Choose this item when Owens Corning model/MPN 867466, SKU OCFWLM2, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.