Product Data Sheet Show all documents

BC Bitumen Coating

Bituminous waterproofing basecoat

BC Bitumen Coating is a bitumen emulsion composed of selected grades of flexible bitumen. Dark brown in colour drying to a black flexible coating. When dry, it will not re-emulsify in water.

The film of BC Bitumen Coating has no significant tendency to creep and has great stability over a wide range of temperatures. The coating is flexible and jointless. Application requires no special skill and it may be brushed or sprayed on to any inclination of surface. BC Bitumen Coating may be applied to:
  • Cement/sand rendering
  • Reinforced concrete
  • All types of concrete blocks
  • All clay and calcium silicate blocks
  • Asbestos cement sheeting
  • Cement paint
Product Data Sheet Show all documents

Usage

  • To provide a waterproof membrane on structural reinforced concrete not exposed to UV, for example retaining walls
  • As a priming coat for bituminous membranes
 

Advantages

The film of BC Bitumen Coating has no significant tendency to creep and has great stability over a wide range of temperatures. The coating is flexible and jointless. Application requires no special skill and it may be brushed or sprayed on to any inclination of surface. BC Bitumen Coating may be applied to:
  • Cement/sand rendering
  • Reinforced concrete
  • All types of concrete blocks
  • All clay and calcium silicate blocks
  • Asbestos cement sheeting
  • Cement paint

Packaging

  • 20 kg pail
  • 200 kg drums

Colour

Black

Product Details

Product Information

Shelf life

24 months from the date of production

Storage conditions

Stored properly in original, unopened and undamaged sealed packaging in dry conditions. Keep away from direct sunlight and frost.

Density

~1.0
Technical Information

Thermal Resistance

The cured film will not flow or sag under direct sunlight.

Reaction to Fire

  • Wet: non-flammable
  • Dry: will burn slowly

Application

Application Information

Ambient Air Temperature

Not below +5°C

Drying time

Under normal conditions, 4 - 6 hours but a period of 24 hours should be allowed between coats (it may be considered dry when rubbing with a
wet finger does not produce a brown stain).
Consumption

Consumption

Priming coat

0.2 kg/m² (dilute 1:1 part by weight with clean water)

Neat coat

0.6 kg/m²
Application steps

SUBSTRATE PREPARATION

New concrete, screed or render
Should have a brushed or wood float finish, and should be free from contaminationby any material that could impair adhesion. All surface defects should be repaired by approved methods. Protrusions greater than 3 mm should be removed.

  
For old painted surfaces
Loose material and/or organic growth must be removed with a stiff bristle (not wire) brush and spores should be killed with a suitable fungicide
which should be scrubbed in, left for 24 hours and washed off with clean water.
Where surfaces are chalking and friable, remove all loose material, liberally apply stabilising solution and allow to dry for at least 24 hours.
Cracks should be made good, allowed to dry and then covered with BC Bitumen Coating into which is embedded open weave glass fibre scrim.
Spalled concrete should be made good.

MIXING

As a priming coat, add an equal volume of clean water and stir well. For the neat coat, the material is ready for use from the can after stirring
thoroughly.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened and/or cured material can only be removed mechanically.

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