Henkel Polybit Bitumastic is a single-component, solvent-based bitumen rubber mastic sealant designed for waterproofing and sealing applications. It cures to form a tough, flexible, and waterproof seal with excellent adhesion to concrete, brickwork, asphalt, metal, and most construction substrates. The product is reinforced with non-asbestos fibers, making it non-slump and suitable for both horizontal and vertical applications. It is ideal for sealing roof joints, cracks, flashing details, waterproofing membrane terminations, and service pipe penetrations. Available in a 20kg pail, it provides durable protection against water ingress and weathering.

CHARACTERISTICS
►    Flexible joint sealant
►    Stability at high ambient temperatures
►    Excellent adhesion, strong durable bond
►    Single component 

FIElDS OF APPlICATION
Bitumastic is ideally suited for sealing and filling gaps and 
joints on roofs, pointing horizontal chases for waterproofing 
membranes and felts. Sealing around roof/wet service 
pipes. Pointing between brickwork and roof flashings. 
Sealing cracks in asphalt and concrete pavements. Filling 
horizontal joints in concrete and asphalt where movements 
are not expected.

APPlICATION INSTRUCTIONS

Surface preparation :-
Surface must be free from all dirt, dust and loose material. 
Any oil and grease contamination must be removed 
completely. The surface must be made dry prior to the 
application of the sealant. 
Masking ;-
Prior to application of primer and sealant, apply masking 
tape to the adjacent sides of the joints for getting a neat 
finish and to avoid the spilling over of the sealant on the 
edges.
Priming :-
Under normal circumstances priming is not required. 
However, for very dry and porous surfaces, it is 
recommended to apply one coat of a solvent based bitumen 
primer (Polyprime SB)*. Similarly for joints subjected to 
continuous immersion, priming is recommended.
Application :-
The sealant can be applied by means of a spatula or trowel. 
As the product is solvented, it is recommended to mix the 
contents of the pail with a paddle mixer for a few minutes 
prior to the application to ensure a homogenous mix. Sealant 
application should start form the bottom of the joint/groove 
and continued to the top. Immediately tool the joint with the 
spatula or putty knife to smoothen and compress the sealant 
to effect total contact with joint surfaces. The putty knife shall 
be moistened with a cleaning solvent to prevent the sealant 
to adhere to the knife and ensuring a smooth and neat finish. 
Where masking tape has been employed to keep building 
surfaces clean, it is advisable to remove them at the moment 
the sealant filling is completed.

HEAlTH & SAFETY
Bitumastic contains petroleum distillate, is flammable. 
Keep away from fire, sparks or other source of ignition. 
Wear protective clothing, rubber gloves, mask and safety 
goggles.
1. Fire - flammable when wet.
2. Skin - avoid repeated or prolonged contact. Remove 
bitumen stains with a suitable cleaner that is able to 
remove oil or grease and then clean with soap and 
water.
3. Eyes - contact could cause irritation. Flush with copious 
amount of clean water.
4. Inhalation - can cause dizziness. If difficulty in breathing 
persists, administer oxygen