SmartFlash ONE Polyester Reiforcement is a proprietary weave fabric used in conjunction with SMARTFlash ONE polyurethane bitumen waterproofing resin.

SmartFlash ONE is designed for flashing new or existing penetrations and construction details within low-slope modified bitumen and/or built-up roofing (BUR) roofing systems.  SmartFlash ONE is also a durable, long-term repair solution for flashings or cracks within a steep slope asphalt shingle roof.  SmartFlash ONE membranes form full closure to irregular flashings and penetrations of every imaginable shape, and eliminate the need for pitch pockets on low-slope penetration details.  SmartFlash ONE, when cured, virtually becomes part of the substrate.

SmartFlash ONE Polyester Reinforcement is included within the Flash Pack and sold separately in cartons with sixteen 6" x 100' rolls.

Technical Information


SmartFlash ONE is designed for use on bituminous low-slope roof systems or asphalt shingles; not for use with single-ply membranes such as TPO, PVC or EPDM.

  • Wear protective latex gloves during application.  Resin adheres to skin and is difficult to remove.
  • Apply when the ambient temperature is 40°F and rising
  • Apply with a brush, roller or squeegee
  • Do not dilute or thin

Prepare substrate to ensure the surface is free of debris, moisture or contaminants.  Apply resin at a rate of two (2) gallons per 100 ft2 or 30 wet mills. Primer is not required2. Immediately embed polyester reinforcement into wet resin.  NOTE: For repair applications, center polyester over crack and exceeding the crack or hole by 3" on all sides. Saturate polyester reinforcement at a rate of two (2) gallons per 100 ft2 or 30 wet mills, ensuring that the polyester reinforcement is completely embedded and covered.  Allow to dry.  Apply a finish application of resin at a rate of two (2) gallons per 100 ft2 or 30 wet mils. If granular aesthetic is desired, broadcast granul4es into the finish coat before the surface forms a skin.

2Primer not required for APP or SBS-Modified Bitumen Substrates or BUR Substrates set in Hot Asphalt; Primer required for BUR Substrates set in Coal Tar; SmartFlash ONE is not approved for use on substrates not listed herein.

Clean Up: Clean tools using petroleum solvents such as mineral spirits.  Cured resin may be disposed of in standard landfills.

Warranty Details

CertainTeed offers four low-slope roof system warranty options: Limited Warranty on Materials, Limited Warranty on Systems, No Dollar Limit (NDL) Limited Warranty and Full System NDL Limited Warranty.  CertainTeed warranty durations are based on a combination of system specification and product selection.  Additionally, CertainTeed offers stand-alone SmartFlash/SmartFlash ONE Warranties, should the product be used outside of a CertainTeed low-slope roof system.  Please download an overview of these warranty options for details. Consult with your contractor or CertainTeed Territory Manager to determine which warranty is best for your project.     

CertainTeed offers standard low-slope roof system warranty durations between ten and twenty-five years.  Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client.  

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