Coal Tar Pitch Modified Polyurethane Sealant

COAL TAR PITCH MODIFIED POLYURETHANE SEALANT

Hind Sealant.PPU is Two Component Coal Tar Pitch Polyurethane Modified Sealant, black in colour. When
the two components are mixed together prior to application, a chemical reaction is initiated which cures in
presence of moisture to a firm, flexible rubber like seal with excellent adhesion to concrete, masonry, wood,
glass, metal etc. It is capable of withstanding repeated extension, compression & cyclic movements without loss
of adhesion and resists deterioration by weathering sunlight, ozone, water, salt, oils and fuels.
USES
Hind Sealant.PPU is recommended for protection of Sealing of expansion, contraction & construction
joints in building structure such as Basements, subways, retaining walls, floors, external walls and
claddings of high-rise buildings.
Sealing of dynamic structural cracks.
Glazing joints of window, door frame and curtain walls.
Sealing of joints in traffic areas such as Bridges, roads and car parking areas.

APPLICATION
Surface Preparation
Preparation of surface is the most important step before application of sealant to get best results and to avoid
failure. The joint surface must be dry, free from dust, coatings, bituminous mastics, concrete curing agents,
mould release agents, oils, greases and loose particles. Clean the joint surface by wire brush and sanding with
emery paper. Remove dust by compressed air or paint brush. Wipe out oil and grease by solvent soaked cloth
(such as Xylene, Toluene or Acetone).

Masking Tape
Apply masking tape such as self-adhesive polyethylene, cellophane or cloth tape on both edges of the joint. It is
used to improve the neatness of the finished seal by protecting the face edges of the joint. It may be removed
immediately after tooling of the sealant.

Mixing
Two component Hind Sealant.PPU sealant are packed in pre-weighed quantity as per the mixing ratio. Mix the
material of individual container first and then mix together and stir it thoroughly to a uniform, homogenous
black colour. Mixing can be done manually with spatula / palette knife of special flat stirrer attached to a low
speed electric mixer less than 500 r.p.m. Apply the mixed sealant by means of a spatula or by filling into a
plastic cartridge which is then placed into the hand held causing gun into the joint.

Tooling and finishing:
It is desirable that a smooth surface is obtained. Tool the sealant by pressing the puffy knife or flat tool against
the sealant surface, moving along the length of the joint. Tooling breaks air bubbles and exposes any air pockets
present. Tooling compresses the sealant, thus promoting adhesion to the joint sides. After tooling the masking
tape should be removed immediately.

PROPERTIES
Aspect Black Paste
Specific Gravity 1.10 approx
Mixing Ratio 1 : 1 by weight
Application time (pot life) at 30 degree C 45-60 Minutes
Initial setting time at 30 degree C 4 Hours
PACKING
1 Kg. & 2 Kg. Kit
SHELF LIFE
6 months in original unopened container. Do not expose or open container to high humidity conditions.
HANDLING PRECAUTION
Hind Sealant.PPU is non-toxic but ingestion is to be avoided. Any splashes to the skin must be washed with
water. If contact with eyes occurs, wash well immediately with water and seek medical advice.