Bitumen Mastic

Thompsons Bitumen Mastic is ideal for small repairs or cracks in flat roofs. It will fill and bridge gaps leaving an immediate water tight repair, even in heavy rain or under ponding water. Use this before applying a maintenance coat over the whole surface

Bitumen Mastic 1L

For filling joints, cracks & splits in roofing

Resistant to water penetration immediately after application

Ideally suited for maintenance and remedial work

Suitable for use on:

ALL ROOFING MATERIAL

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Come rain or shine, Thompson's got it covered

Drying Time

Immediate

Coverage

0.5-4m2 / litre

Sizes

1L_5L

Colours

Black

Coverage

0.5-4m2 / litre

Sizes

1L_5L

Colours

Black

Ensure surface is clean, dry and free from oil, grease and dirt

Moss and lichen can be removed using Thompson’s Mould & Mildew Cleaner

Bolt heads on roof sheets should be wire brushed to remove rust before being sealed with Thompson’s General Purpose Bitumen Primer.

Porous surfaces should be primed with Thompson’s General Purpose Bitumen Primer in order to seal the surface. The Primer should be allowed to dry thoroughly before applying Thompson’s Bitumen Mastic.

Apply Thompson’s Bitumen Mastic by trowel or putty knife

Force material into cracks and joints, smoothing out on either side

Cracks or joints more than 3mm should be reinforced with glass fibre scrim and covered with a second application of mastic.

Tools should be cleaned with white spirit immediately after use.

Hardened material can be removed by soaking in white spirit.

Replace lid to ensure an airtight seal.