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Excessive, prolonged heating of asphalt can have a detrimental effect on the integrity of the product. Additionally, excessive heating of asphalt poses a serious flash or fire hazard. Refer also to the “Safety” section beginning on page 53 of this handbook for more information.

The following chart shows guidelines for heating of asphalt by type (Type III and IV):

NRCA published guidelines regarding heating and slope restrictions for mopping grade roof asphalt

ASTM D312 Type

Mopping Temp.

Heating Temp.

Maximum Slope*

Type III

425° F+/-25°F

500°F

1"

Type IV

425° F+/-25°F

500°F

3"

*CertainTeed recommends use of Type IV asphalt for interply moppings regardless of slope

Cold Adhesive Application FlintBond SBS modified bitumen adhesive shall be used to apply Flintlastic SBS modified bitumen membranes, Flintglas Cap sheets and coated base sheets. FlintBond shall not be used with APP and SBS modified bitumen membranes designed for torch applications or Flintglas ply sheets.

Flintlastic GMS can be applied using FlintBond SBS Modified Bitumen adhesives (squeegee method shown)

Strict attention must be paid to weather and climate limitations, application method and technique, curing time, application rates (gallons/100 ft2), handling and storage. These requirements are outlined in the technical data sheets. Proper squeegee or spray equipment must be used. Do not use modified bitumen adhesives in areas without proper ventilation.

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