APOC Weather-Armor SB-1 Self-Bond Roof Underlayment 2 Square/Roll

The APOC Weather-Armor SB-1 Self-Bond Roof Underlayment 2 Square/Roll is a ice & water underlayment for jobs that require APOC model/MPN AP-4100-2 in the RL sell unit. APOC Weather-Armor SB-1 Self-Bond Roof Underlayment is your premium, all-purpose roof underlayment and leak barrier.

Key Specs

• Brand: APOC
• Model / MPN: AP-4100-2
• SKU: APOWASB1U2
• Sell unit: RL
• Product type: Ice & Water Underlayment
• Size / color: 2 Square/Roll
• 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

• APOC Weather-Armor SB-1 Self-Bond Roof Underlayment is a blend of highly flexible and elastic polymers, performance grade bitumen, high strength glass reinforcement and anti-slip mineral surfacing
• SB-1 is easy to install and utilizes a split release film for easier positioning, faster installation and clean lines

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?

APOC Weather-Armor SB-1 Self-Bond Roof Underlayment 2 Square/Roll, sold as RL, with SKU APOWASB1U2 and manufacturer model/MPN AP-4100-2.

What model or part number should I match?

Match model/MPN AP-4100-2 and confirm the brand is APOC. 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 APOC model/MPN AP-4100-2, SKU APOWASB1U2, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.