Application

• Sealing of expansion contraction and construction joints up to ±15 %
  movement capacity.
• Sealing of construction joints upto max. 25 mm joint width.
• Sealing of construction joints in water tanks, reservoirs, canals, culverts
  and water treatment works.
• Sealing of metal and wooden window frame and concrete mortar joints.
• Sealing of floor joints in chemical industries.
• Sealing of tiles, stones, bricks and marble cladding joints.
• Sealing of sanitary ware and plumbing joints.
• Sealing of joints in traffic areas such as Bridges, roads and car parking
  areas.

Features / Advantages

• Cures at ambient temperature to a tough, elastic and flexible rubber like material.
• Adheres (Bonds) strongly to most of the building materials with the use of recommended primers.
• Resistant to vibrations and limited surface movements.
• Provides satisfactory seal in the crack or joint subject to regular movement,
  with ± 15 % movement capability.
• It has excellent tear resistance.
• Performs well in a temperature ranging from -20°C to + 80°C.
• Resistant to bio-degradation prevents the growth of fungus and micro
  organisms.
• It has excellent pourable & self levelling material used for sealing horizontal joints only
• Excellent reparability property.
• It can be overcoated by waterproofing compounds.

Direction for use

Surface Preparation

• Surface preparation 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 surfaces by wire brush and sanding with emery paper.
• Remove dust by compressed air or paint brush.
• Wipe out oil an grease by solvent soaked cloth (such as xylene, toluene, acetone).

Back up materials
Insert compressed polyethylene, polyurethane, thermocol foam, neoprene, polyethylene, butyl rods as a back up material to control depth of sealant in the
joint & provide support for tooling of the sealant.


Primer Application
Select a primer suitable to the substrate and apply two coats by brush on the sides of the joint surface at an interval of 30 minutes.

PRIMER RDL 942 : For porous substrate such as concrete, wood etc.
PRIMER RDL 947 : For non porous substrate such as metals, glass etc.


Bond breaker
Fix bond breaker tape such as self adhesive polyethylene tape on the back up
material to avoid adhesion of sealant to the third surface.


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
The base and the accelerator compounds supplied are packed in pre-weighed
quantity as per mixing ratio. After the application of primer, mix the material of individual container.

Transfer the entire quantity of accelerator to the base compound tin and mix it thoroughly to a uniform, homogeneous mix. Mixing can be done manually with
spatula or by using a flat stirrer attached to a slow speed electric drill.


Application
Apply the mix compound by means of a spatula, putty like knife or a hand held caulking gun. Fill the joint or crack with the sealant.


Tooling & Finishing
Tool the sealant by pressing the spatula or a putty knife blade firmly against the sealant surface, moving along the length of joint. Tooling is necessary to remove voids, ensure good wetting of interfaces and give neat aesthetic appearance.
After tooling, the masking tape should be removed immediately.

Coverage
To estimate the quantity of Techseal CTPU 603 (CTB) required to seal the joint can be very easily estimated by using the following formula,

  L  =  650
         WxD

L = length in running meter of joint.
W = width in mm of joint.
D = depth in mm of joint.

Application steps after surface preparation

Cleaning of tools and equipment
Tools and equipment can be easily cleaned with solvents as Xylene, Toluene , Methyl ethyl ketone or Acetone.


Storage and shelf life
Store the materials at cool and dry place (25°C temperature and 50 % relative humidity). Shelf life is one year when materials are stored in unopened containers as per the recommended storage conditions.


Packing
1, 4 Kg (Base & accelerator compounds are packed separately). Specification
complies BS -5212


Precautions
Some people are sensitive to resins, hardeners, solvents & its vapours, so it is advisable to use hand gloves and goggles.

While application, proper ventilation should be provided.

• Avoid application below 10°C temperature of surface. At low temperatures,
  drying & curing periods will be prolonged.
• Avoid application on damp or moist conditions as it will create blister formation problem.
• Mixed both compounds thoroughly to uniform and after mix pour the materials within one hour in appropriate primed joints.
• Shelf life of the unmixed material is one year from the date of manufacture.
• Store in cool and dry place.