The RESISTO RESISTOFLEX Underlayment is a ice & water underlayment for jobs that require Resisto model/MPN 00943 in the RL sell unit. RESISTOFLEX – ROOFING UNDERLAYMENT This product is a 36 in (0.91 mm) roofing underlayment membrane made of elastomeric SBS bitumen and glass mat reinforcement.

Key Specs

• Brand: Resisto
• Model / MPN: 00943
• SKU: RESVF3633
• Sell unit: RL
• Product type: Ice & Water Underlayment
• Size / color: 1 Square/Roll
• Category: Residential Roofing | Residential Roofing/Underlayment | Residential Roofing/Underlayment/Ice & Water Underlayment | Underlayment | Underlayment/Ice & Water Underlayment
• Coverage / unit: 1 squares (100 sq ft) per roll

Key Features

• Non-slip, sanded finish
• Withstands exterior temperature fluctuations
• Can also be used under mechanically attached tiles

Coverage & How Much You Need

This item is listed as 1 squares (100 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?

RESISTO RESISTOFLEX Underlayment, sold as RL, with SKU RESVF3633 and manufacturer model/MPN 00943.

What model or part number should I match?

Match model/MPN 00943 and confirm the brand is Resisto. 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 1 squares (100 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 Resisto model/MPN 00943, SKU RESVF3633, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.