Bitumen Malthoid Dampcourse

Self adhesive bitumen flashing tape is a self-adhesive, aluminum /hdpe film surfaced bitumen backed sealing strip. It is a quick, efficient and cost effective method of flashing, sealing and repair that produces a lasting protection in all climates.

Self adhesive bitumen flashing tape is a self-adhesive, aluminum surfaced bitumen backed sealing strip. It is a quick, efficient and cost effective method of flashing, sealing and repair that produces a lasting protection in all climates.
It is recommended for all substrate sealing repairs on asphalt, bituminous sheets, glass, metal, plastics, timber, mortar, concrete, bricks, roof tiles, stone. Seal guttering, downpipes, roof sheets or flashings. Seal cracked brickwork, concrete, titles or glass. Seal carport or verandah roof to main wall. Seal window frames, chimney, etc

Technical information

An aluminum foil/ hdpe film carrier
A self adhesive rubber modified compound and
A silicone coated release interleave( removed during application)



Thickness: 1.0mm, 1.2mm, 1.5mm
Available in rolls:
50mm x3m, 75mm x 3m, 50mm x 10m, 100mm x 10m, 150mmx10m, 225mm x 10m
Special sizes made to order

A damp proof course ( dpc ) is a physical barrier inserted into the fabric of a building to stop water passing from one place to another. This can be on a horizontal plane, stopping water rising up from the ground by being sucked up by the dry masonry above, or vertically to stop water passing from the outside of a building, though the masonry, to the inside. Dpc's have taken many forms through the ages and one of the earliest forms was to use a layer of slate in the construction. Slate is still used but the less expensive plastic version ( below right ) is now more widely used.

Technical specification of dpc

Water vapour permeability
0.28 gm2 day-1
Bs3177

Water vapour transmission
733 mnsg-1


Water absorption
0.22%
Bs2782 : 430a

Resistance to leakage at joints
Pass
Moat 27 : 5.2.1

Tensile strength of joint
Unaged : 300 n
Heat aged : 290 n
Water soak : 257 n
Moat 27 : 5.2.2/3/4

Cold flex temperature
−60¡ãc
Bs2782 : 320a

Tensile strength
L : 12.9 nmm-2
T : 11.2 nmm-2
Bs2782 : 320a

Elongation at break
L : 415%
T : 582%
Bs2782 : 320a

Tear strength
L : 122 nmm-1
T : 96 nmm-1
Bba method

Low temperature flexibility
L : <−25
T : <−25
Moat 27 : 5.4.2

Dimensional stability
L : −2.0%
T : −0.3%
Moat 27 : 5.1.6

Mortar adhesion test
Pass
Cream method



Size available
110mm x 30 m/50m
150mm x 30 m/50m
230mm x 30 m/50m
300mm x 30 m/50m
380mm x 30 m/50m
450mm x 30 m/50m
600mm x 30m/50m
Special sizes made to order