Mastic Asphalt - Damp proofing material
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Mastic Asphalt

Asphalt: A mixture of bitumen and mineral filler. Note that Hot Rolled Asphalt is a road surfacing material.

Mastic: An adhering asphalt which is placed with trowelling.

Mastic asphalt is a type of asphalt usually around 7–10% of the whole aggregate mix, This thermoplastic substance and used in waterproofing flat roofs and tanking underground. Mastic asphalt is heated to a temperature of 210 °C (410 °F) and is spread in layers to form an impervious barrier about 20 millimeters (0.79 in) thick.

Applied in hot state in 1” to 2” (2 cm to 5 cm)

[Image: asphalt.jpg]
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