New Product Development And Advancements In STP’s Existing Range


Hasan Rizvi
Senior Vice President 


STP Limited, an Indian company with over 80 years of backing, is a subsidiary of Berger paints. It is the most trusted name in the field of coal tar/bitumen/construction chemicals, for its quality and services. Further, it is one of the oldest company associated with waterproofing.

In India, the condition of most of the roads is pathetic, especially during the monsoon; the main cause of damage is simple, water entering the roads. The life of the roads can be increased by providing proper side drains and a water resistant top layer.  Over the years, STP Ltd. has developed specially ShaliSeal RSTC, which is a coal tar based sealer and almost unaffected by water. This product has been applied on various roads and has given incredible results.

Further, the deterioration of bridge deck is one of the most extensive bridge maintenance problems affecting the service life of bridges. The causes of deterioration include the penetration of moisture and chlorides into the concrete, with subsequent corrosion of the steel reinforcement. In such a case, the use of waterproofing membranes like SuperThermoLay APP prevents moisture and chlorides from reaching the concrete by providing a barrier above the concrete deck. The waterproofing membrane is then protected from the traffic by an asphalt overlay, followed by spray/coating of ShaliSeal RSTC.

Bitumen has been used as a paving material since the 18th century. This material deteriorates under sun’s ultraviolet rays, gets dissolved by petrochemicals, is attacked by chemicals, de-icing salts, etc. Presently, bitumen based fog sealers are used in India. As it is known that bitumen get deteriorated by water, it is the appropriate time to use a water resistant sealer in roads. The answer to this is ShaliSeal RSTC from STP Ltd.; this is an incredible product, set to revolutionise the Indian roads.



 ShaliSeal RSTC Coating on Elevated Roads                          



Coloured Slurry Seal


ShaliSeal RSTC

Important highlights of ShaliSeal RSTC:

  • Top coat road slurry for enhancing road life by preventing water ingress
  • Refined coal tar based emulsion, designed to protect asphalt pavements
  • Resists ultra violet radiation
  • Resists fuel impregnation
  • Reduces aging of asphalt, reducing maintenance



ShaliPatch EC


Coloured Slurry Seal

Approach roads to bridges and toll plaza can be coated with ShaliSeal CSS. As bitumen is black due to the presence of Asphaltene, which is required to serve specific purpose, it fails to provide coloured surfaces.


STP Ltd. has developed Coloured Asphalt with the following highlights:

  • Long lasting colour options
  • Increased road safety and higher contrast
  • Greater illumination inside tunnels
  • Reduced lighting in tunnels
  • Greater creativity for landscape
  • Differentiates in pavement functions
  • Attractiveness of sport venues
  • Durable and easy to maintain


ShaliPatch EC
Some features of ShaliPatch EC include repair of cracks in rigid and flexible pavement, self levelling and easily trowel-able into cracks and spall. It prevents percolation of water and other chemicals, thus protecting it from wearing off.

ShaliPatch EC is a three-component cold applied polymerised elastomeric concrete with excellent adhesion to substrate, used for:

  • crack filling, ranging between 5 - 50 mm wide in concrete/flexible roads
  • surface correction in concrete road/pavement

Expansion joints are an integral part of structures where thermal movements are pronounced on account of their dimensions. ShaliSeal PU 2K is one of the most durable and economical PU based sealants developed by STP Ltd.


For more information,