The Carlisle WIP 300 HT High-Temperature Underlayment White 36″ x 67′ is a ice & water underlayment for jobs that require Carlisle model/MPN 305148 in the RL sell unit. WIP 300HT is a high-tensile-strength rubberized asphalt underlayment specifically designed to withstand temperatures up to 250F (121C).

Key Specs

• Brand: Carlisle
• Model / MPN: 305148
• SKU: CARWIP300
• Sell unit: RL
• Product type: Ice & Water Underlayment
• Size / color: 36″ x 67′
• 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

• Protects the roof structure from water seepage caused by ice dams and wind-driven rains
• Resists temperatures up to 250F without degradation of the adhesive
• Seals around roofing nails, staples and screws
• Split-release fi lm provides easier, faster installation
• Resists cracking, drying and rotting, providing long-term waterproofi ng performance and low lifecycle cost
• Concealed waterproofi ng system will not detract from the architectural aesthetics of the primary roofi ng system

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?

Carlisle WIP 300 HT High-Temperature Underlayment White 36″ x 67′, sold as RL, with SKU CARWIP300 and manufacturer model/MPN 305148.

What model or part number should I match?

Match model/MPN 305148 and confirm the brand is Carlisle. 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 Carlisle model/MPN 305148, SKU CARWIP300, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.