TarPlastic® is a cold applied bituminous caulking compound with mineral fillers in a volatile solvent to retain its plasticity. It is available in a putty form. TarPlastic® remains plastic for a considerable length of time. The skin and interior harden to some extent after application. It conforms to the requirement of IS : 1580 – 1991.


  • It is ideal for use in situation where certain degree of expansion, contraction and vibration is expected, like around J Hooks used for fixing Asbestos / GI sheets. It can also be used for caulking various types of roofs and masonry walls, including
  • Fully plugging gaps in tiles caused by sagging of battens or otherwise in case of tiled roofs.
  • Filling minor cracks / gaps in terraced roofs or other locations.
  • Advantages

  • Cold applied and ready to use. Does not require specialised handling for application.
  • Does not creep or flow when applied on vertical or sloping surfaces.
  • Remains plastic for a considerable time and, therefore, can accommodate a good degree of expansion, contraction and vibration.
  • Packing

    Available in 200 Kg, 20 Kg, 4 Kg and 1 Kg Containers.


  • Keep in cool and dry place in air tight container under shed away from heat.
  • Health & Safety

  • Lid of the container should be firmly fixed, when not in use.
  • Inflammable and hence keep away from direct flame.
  • TarPlastic® shall have no harmful reaction, when it comes in contact with drinking water.
  • Use goggles, hand gloves and trowel during application.
  • Clean hands with warm soap water after application
  • Application Methodology

  • Surface must be clean, dry and free of grease, oil and painting compound.

  • Concrete surface must be dry and stable (atleast) four weeks.

  • Check that mastic is compatible with surface in terms of adhesiveness, staining and chemical compatibility (test a section first).

  • If necessary apply a thin layer of Sealant Primer on the surface.

  • After the primer has dried press flexible non adhesive filler on to the groove.

  • The joint filler should be free of holes to ensure that bubbles do not form in the joint. For better finish use protection strip.

  • For a narrow joint apply the mastic in one movement and for very wide joint, apply the mastic in three places: The first two on the edges of the joint and third in the joint filler.

  • Smooth out with soapy water. Press the mastic against the edges and the joint while taking care not to create air bubbles. Remove protection strip.