The CertainTeed Flintlastic SA MidPly Interply & Base Sheet Blue 39-3/8" x 32' 1" is a bur & mb systems for jobs that require CertainTeed model/MPN 650491 in the RL sell unit. Flintlastic SA MidPly is designed for use as a premium base or interply in fully self-adhered systems or hybrid systems with a torch applied cap

Key Specs

• Brand: CertainTeed
• Model / MPN: 650491
• SKU: CERSAMP
• Sell unit: RL
• Product type: BUR & MB Systems
• Size / color: 39-3/8" x 32' 1"
• Category: Commercial Roofing | Commercial Roofing/Membranes | Commercial Roofing/Membranes/BUR & MB Systems
• Coverage / unit: 1 squares (100 sq ft) per roll

Key Features

• It is intended for use over Flintlastic SA NailBase, Flintlastic SA PlyBase or directly self-adhered to suitable substrates
• The top surface contains a permanent blue film that must not be removed. The back surface is finished with a mineral release agent.
• Flintlastic SA MidPly is manufactured using a heavy duty fiberglass reinforced mat, saturated and coated with a superior grade of SBS-modified bitumen compound on the top of the sheet and a proprietary pressure sensitive SBS-modified bitumen adhesive on t
• Removable release film

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

FAQs

What exactly am I ordering?

CertainTeed Flintlastic SA MidPly Interply & Base Sheet Blue 39-3/8" x 32' 1", sold as RL, with SKU CERSAMP and manufacturer model/MPN 650491.

What model or part number should I match?

Match model/MPN 650491 and confirm the brand is CertainTeed. 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.

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

Product Expert Notes

Choose this item when CertainTeed model/MPN 650491, SKU CERSAMP, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.