Expansion Joint Treatment

Polysulphide Sealant

It is a two part joint sealant based on a liquid polysulphide polymer containing a base component and curing agent in the correct proportions which, when mixed together, cure to form a tough rubber-like material. When cured, the sealant exhibits excellent adhesion to most surfaces including concrete, aluminium and stainless steel. Priming is recommended for porous surfaces and for some specific surfaces and applications.

It is particularly recommended for use in high rise buildings and other applications where access for subsequent maintenance will be difficult and the risk of early movement failure must be minimised. It is also suitable for sealing joints in subways, basements, retaining walls, reservoirs and brickwork joints.

Advantages:

  • Cures at ambient temperatures to a tough, elastic and flexible rubber like material
  • Bonds strongly to most of the building materials with the use of recommended primers
  • Durable remains unaffected by UV rays, ozone and weathering conditions
  • Resistant to water, salt water, 10% dil. Acids except nitric acids, alkalis, most of the common chemicals, vegetable, lubricating oils and fuels
  • Performs well in a temperature ranging from – 20OC to 80OC
  • Slip resistant (sag) can be applied in horizontal joints
  • Movement capability – Provides satisfactory hermetic sealing of the joint subjected to expansion, contraction, vibration and cyclic movement within the following limits. Movement joints up to ± 25% of the width
  • Slip resistant (non-sag) can be applied in vertical & ceiling g joints
  • Self leveling, after pouring in horizontal joint levels itself
  • Recovers the original width after expansion & contraction without losing the surface bond
  • Excellent reparability property
  • It can be over coated by waterproofing compounds
  • Non-toxic
  • Sealant will not cause staining to concrete masonry or stone

Uses:

  • Sealing of expansion, contraction & construction joints in building structures such as, basements, subways, retaining walls, floors, external walls and claddings of high-rise buildings, roof terraces and ceilings especially structural expansion joints running through the ceiling.
  • Sealing of dynamic structures cracks
  • Joints in water retaining structures such as water tank, swimming pool including decks, aqua ducts, dams, canals, reservoirs and water treatment plant.
  • Sealing of joints in traffic areas sus as concrete roads, bridges, flyovers & airport runway.
  • Nuclear power station reactor domes.
Polysulphide sealant is available in two grades:

(Gun Grade) is a non-sag material used for sealing of horizontal, vertical & ceiling joints.

(Pour Grade) is a pourable & self leveling material used for sealing of horizontal joints only.

Acrylic Sealant

Acrylic sealant is a white acrylic based gap filler in paste form for application from a cartridge. It is very quick and easy to apply and can be finished or smoothed off with a spatula or a damp sponge. It sets quickly on application and will accept paint or wallpaper finishes.

Typical uses for acrylic sealant are gaps between skirtings, window and door frames, fitted furniture units and ceiling cornices and adjacent plaster work. Where replacement windows are installed acrylic sealant can be used to make good between new frames and interior plaster work.

Advantages:

  • Easy to apply and finish
  • Excellent adhesion to most building materials
  • Fast setting
  • Non-staining
  • Flexible seal
  • Can be over painted or papered

 Uses:

  • Wall / ceiling angles, cornices
  • Door and window frame surrounds
  • Fitted furniture
  • Skirtings
  • Staircases
  • Replacement window installations
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