The CertainTeed SMARTCOAT 365 Silicone Repair Mastic is a specialty membrane accessories for jobs that require CertainTeed model/MPN 412323 in the 2G sell unit. SMARTCOAT 365 Silicone Repair Mastic is a flashing-grade, stand-alone, fiber-fortified silicone mastic for direct-bond permanent repairs to many roof surfaces, wet or dry, including asphalt, single-ply, metal, and most existing coatings.

Key Specs

• Brand: CertainTeed
• Model / MPN: 412323
• SKU: CER412323
• Sell unit: 2G
• Product type: Specialty Membrane Accessories
• Size / color: 2 gal
• Category: Commercial Roofing | Commercial Roofing/Membrane Accessories | Commercial Roofing/Membrane Accessories/Specialty Membrane Accessories
• Coverage / unit: 2 gal per listed unit

Key Features

• White, Gray, Black
• 24 lbs.
• Dry Time 2-6 Hours
• Approximate coverage 12-13 sq.ft. per gallon applied 1/8" thick; additional material may be required when 3-coursing to saturate and encapsulate polyester fabric
• Available in 2G pails
• High elasticity/recovery - accommodates wide swings in temperature and significant building movement

Coverage & How Much You Need

This item is listed as 2 gal per listed unit. 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 specialty membrane accessories, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

CertainTeed SMARTCOAT 365 Silicone Repair Mastic, sold as 2G, with SKU CER412323 and manufacturer model/MPN 412323.

What model or part number should I match?

Match model/MPN 412323 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 2G sell unit. Confirm the unit before comparing price, quantity, or coverage.

How do I estimate quantity?

Use 2 gal per listed unit, 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 CertainTeed model/MPN 412323, SKU CER412323, and the 2G sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.