The MB Tech LayfastSBS TU-70 Underlayment is a bur & mb systems from MBTechnology for exact-match material ordering. Match manufacturer model/MPN TU70. This variant is sold as RL with SKU MBTLFSBS70. The heaviest grade of layfast underlayment (70 lb).

Key Specs

• Brand: MBTechnology
• Model / MPN: TU70
• SKU: MBTLFSBS70
• Sell unit: RL
• Product type: BUR & MB Systems
• Size: 39-3/4“ x 33’ 6"
• Color / finish: Black
• Category: Commercial Roofing | Commercial Roofing/Membranes | Commercial Roofing/Membranes/BUR & MB Systems

Key Features

• Versatile - ideal for Tile, Shake, and Shingles. Other uses: Torch SBS and B.U.R. applications.
• Economical - For pennies more offer a superior product to your customer, distinguish your bid and increase your chance of securing the job
• Fiberglass reinforced (inorganic). Doesn’t decompose like felt.

Coverage & How Much You Need

Confirm coverage/yield from the manufacturer instructions and job takeoff before ordering.

Compatibility / Fitment

Use only with compatible systems and installation conditions specified by the manufacturer.

FAQs

What exactly am I ordering?

MB Tech LayfastSBS TU-70 Underlayment, sold as RL, SKU MBTLFSBS70, manufacturer model/MPN TU70.

What unit is the price based on?

The price is for the RL sell unit.

What should I match before ordering?

Match brand, model/MPN where available, size/color, sell unit, and the project specification.

Can this be substituted?

Treat this as an exact-match building material selection; hold for review before substituting a different model, color, size, or system family.

How do I estimate quantity?

Use the project takeoff plus manufacturer installation instructions, including waste, overlap, and accessory requirements.

Follow manufacturer instructions, OSHA-safe work practices, local code, and project specifications.

Product Expert Notes

Choose this variant when MBTechnology, SKU MBTLFSBS70, RL sell unit, and MPN TU70 match the job requirement.