UL approved

Eliminates the need for torches and kettles

Excellent cure

Tough, flexible, adhesive and cohesive film

Excellent water and weather resistance

Excellent general adhesive

Excellent lap cement

Good U.V. resistance

Easy to apply

Elastomeric, moves with substrate

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ASTM D-3019 Type III

ASTM D3409

VOC Content: 250 g/L MAX

81 Brush-Grade:
81 Brush Grade is used to adhere SBS modified bitumen membranes, base and ply sheets. 81 Modified Bitumen Adhesive can also be utilized to adhere conventional BUR ply sheets or fully granulated cap sheets. ‍

81 Trowel-Grade:
81 Trowel Grade can be used to make repairs on existing modified applications and flashings on vertical surfaces, i.e. skylights, vents and pipes.

Weight per Gallon: 8.65
Shear Strength: 26 lbs./sq. in.
Peel Strength: 13 lbs./lin. in.
Elongation: 250%
Recovery: 95%
Set Time: 24 to 48 hours
Dry Time: Approximately 30 days
Application Temperatures: 40ºF to 100ºF

Set Time: 24-48 hours at 77°F and50% relative humidity

Full System Cure: Approximately 30 days

Service Temp(Cured Film): -15°F to 180°F

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SURFACE PREPARATION:
‍All surfaces should be free from oil, grease, dirt and loose materials. All BUR surfaces should be patched and repaired with 19 Ultra Rubberized Flashing Cement and 31 Glass Membrane. Metal surfaces must have all rust and scales removed. Recommended application temperature is 40°F to 120°F. If applying at temperatures lower than 40°F, the substrate must be free of moisture and/or ice crystals.

APPLICATION:
‍Apply 81 Modified Bitumen Adhesive Brush Grade on Horizontal surfaces at a rate of approximately 1-2 gallons per 100 square feet; irregular surfaces may require slightly more material. Do not apply adhesive directly to decking or sheathing. On Vertical surfaces apply 81 Modified Bitumen Adhesive Trowel Grade at 1/8” thickness (approx. 8 gallons per 100 sq. feet.). 81 Modified Bitumen Adhesive may be applied by serrated squeegee, roller, brush or trowel. Application of one or multiple layer(s), allow a minimum of 15-20 minutes open airtime before applying Cap Sheet or before each layer. Do not exceed 2 layers when installing with adhesive. Cover all air intakes during application and while drying. Application thickness, temperature, and number of membranes dictate how long it will take for the product to fully dry. Please consult membrane manufacturer for specific information and installation regarding their product.

COVERAGE RATE:
‍Apply 81 Modified Bitumen Adhesive Brush Grade at the rate of 1 to 2 gallons per 100 sq. ft. On porous or irregular surfaces, 2 gallons per 100 sq. ft. may be required. 81 Modified Bitumen Adhesive Trowel Grade should be applied at 1/8” thickness (approx. 8 gallons per 100 sq. feet.)

Do not use near open flame. Avoid breathing solvent fumes and prolonged contact with skin. Excessive application may create blistering. Application below 40°F may take longer to cure. Do not take internally. If swallowed, do not induce vomiting. Call a physician immediately. Keep out of reach of children. Keep container covered when not in use. Do not thin. Dispose of in an environmentally safe manner. Cover air intakes during application and while drying.

CARE OF TOOLS:
Equipment may be thoroughly cleaned after use with mineral spirits or Karna-Klean taking necessary precaution when handling combustible materials.