Owens Corning WeatherLock Flex Self-Sealing Ice & Water Barrier
Regular price $272.00The Owens Corning WeatherLock Flex Self-Sealing Ice & Water Barrier is a ice & water underlayment for jobs that require Owens Corning model/MPN 788773 in the RL sell unit. WeatherLock Flex flexible self-sealing ice and water barrier provides excellent protection against water infiltration resulting from freeze/thaw cycling, wind-driven rains and normal water flow around eaves, rakes, valleys, vents, chimneys and skylights.
Key Specs
- Brand: Owens Corning
- Model / MPN: 788773
- SKU: OCFWLFS225
- Sell unit: RL
- Product type: Ice & Water Underlayment
- Size / color: 36" x 75'
- Category: Residential Roofing | Residential Roofing/Underlayment | Residential Roofing/Underlayment/Ice & Water Underlayment | Underlayment | Underlayment/Ice & Water Underlayment
- Coverage / unit: 2.25 squares (225 sq ft) per roll
Key Features
- High performance – Flexible and pliable poly surface and modified asphalt combine to adhere around irregular shapes, inside corners and at sharp angles, even in cold-weather applications to 40ºF
- Added protection – Acts as a waterproof barrier in the most vulnerable sections of the roof, such as valleys and other roof penetrations, to create a second line of defense. For optimal protection, apply to entire roof deck on 2:12 to 4:12 pitch roofs
- Aggressive self-adhesive – Exceeds adhesion performance requirements to help prevent water migration
Coverage & How Much You Need
This item is listed as 2.25 squares (225 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 Flex Self-Sealing Ice & Water Barrier, sold as RL, with SKU OCFWLFS225 and manufacturer model/MPN 788773.
What model or part number should I match?
Match model/MPN 788773 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 2.25 squares (225 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 788773, SKU OCFWLFS225, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.
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