General Purpose Bitumen Mastic.

bitu.seal plastic is a hydrocarbon solvent-borne, asbestos-free, reinforced bituminous mastic.

bitu.seal plastic is a heavy duty mastic sealer and repair compound. bitu.seal plastic may be used to seal most roofing defects: sheeting laps, valleys, gutters, down-pipes, enlarged screw holes, to repair roof cracks, flashings, cracked tiles and patch repairs to tanks.

  • Economical waterproofing compound.
  • Easy to apply.
  • May be over-coated.
Surface Preparation

All surfaces to be clean, dry and sound.

Bonding / Priming

Prime with a coat of, which should be allowed to dry prior to over-coating, except for steel which must be coated with a suitable anti-corrosive primer like 4 metal primer.


Stir well before use.

Typical Physical Properties
Density 1.25 to 1.27 Kg/L
Colour Black
Finish Matte
Flash point 30°C
Consistency Mastic
Typical Physical Properties During Application
Volume solids 75%
Dilution Do not dilute
Application rate As needed up thickness to 30 mm
Practical coverage for estimating purposes:
Full overlap and screw-head treatment on corrugated iron roof (150mm wide flashing) : 1L per 2,25m run
In general : 1L per m2 per mm thickness
Drying time @ 25°C Touch dry: 12 hrs
Typical Physical Properties of Dried Film
Max. service temperature Dry: 70°C
Wet: 40°C
Min. service temperature -10 °C
Water resistance No tainting once skin has formed
Water resistance Excellent
Solvent resistance Not resistant
Chemical resistance Resists:
10% Hydrochloric acid
10% Sulphuric acid
10% Phosphoric acid
40% Caustic soda

bitu.seal plastic may be applied by trowel, putty knife, extrusion gun or gloved hand.
bitu.seal plastic can be used in conjunction with a glass fibre membrane. The membrane must be set into the still wet film of bitu.seal plastic.

Cleaning of Equipment

Tools, brushes and mixing equipment should be cleaned immediately after use and before material has set with abe® super brush cleaner followed by washing with soap and water.

Protection on Completion

Where the bitu.seal plastic is ultimately to be exposed to the effects of sunlight and ultra-violet radiation, it is recommended that, some 3 – 4 weeks after being applied, it be over-coated with abe® silvakote.

Temperature & Relative Humidity
 Application temperature range:  5° C to 40° C, but material should be warmed to at least
10° C before use.
Model Specification

General-purpose bitumen mastic.

The mastic will be bitu.seal plastic, a hydrocarbon solvent-borne, reinforced bituminous mastic applied in accordance with the recommendations of a.b.e.® Construction Chemicals. The mastic will be water resistant and have a density of 1.5-1.7 Kg/ L


500 ml, 1 L, 5 L, 25 L and 200 L containers.

Handling & Storage

bitu.seal plastic has a shelf life of 24 months from date of manufacture if kept in a dry cool place in the original packaging. In more extreme conditions this period might be shortened. This product should be tightly sealed while being stored.

Health & Safety

Product safety information required for safe use is not included. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The safety data sheet is available from your local a.b.e.® Construction Chemicals sales representative.

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® Construction Chemicals endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because a.b.e.® Construction Chemicals has no direct or continuous control over where and how a.b.e.® Construction Chemicals’ products are applied – accept any liability either directly or indirectly arising from the use of a.b.e.® Construction Chemicals’ products, whether or not in accordance with any advice, specification, recommendation or information given by the company.

Further Information

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements. 

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