MB TECH LayfastSBS SBS TU-43

The MB TECH LayfastSBS SBS TU-43 is a bur & mb systems for jobs that require MBTechnology model/MPN TU43 in the RL sell unit. LayfastSBS is a superior and competitively priced alternative to traditional 30 lb and 40 lb organic felt.

Key Specs

• Brand: MBTechnology
• Model / MPN: TU43
• SKU: MBTLFSBS43
• Sell unit: RL
• Product type: BUR & MB Systems
• Size / color: 39-3/4″ x 64′ 4″
• Category: Commercial Roofing | Commercial Roofing/Membranes | Commercial Roofing/Membranes/BUR & MB Systems
• Coverage / unit: 2 squares (200 sq ft) per roll

Key Features

• Fiberglass reinforced (inorganic) does not rot like felt, felt is reinforced with recycled paper and you have seen what happens to paper products, like newspaper, after they are left out in the weather
• SBS rubberized asphalt provides a more pliable and elastic membrane, minimizes buckles and wrinkles by laying flatter and smoother saving time
• LayfastSBS is available in three weights, 35-43-70 lbs/square. It can be used in lieu of 30 and 40# felt as an underlayment under shingle, tile, and metal roofs

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 bur & mb systems, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

MB TECH LayfastSBS SBS TU-43, sold as RL, with SKU MBTLFSBS43 and manufacturer model/MPN TU43.

What model or part number should I match?

Match model/MPN TU43 and confirm the brand is MBTechnology. 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.

Verify the manufacturer instructions, local code, and project specification before installation or substitution.

Product Expert Notes

Choose this item when MBTechnology model/MPN TU43, SKU MBTLFSBS43, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.