It’s a specially designed product for ensuring a uniform and strong Tack Coat for bituminous road construction.MARUTI RS-1 cationic bitumen emulsion is also suitable as binder for Penetration Macadam and Sand Seal.

Tack Coat

Tack Coat application is a light spray of Bitumen Emulsion, which may be hand or machine sprayed. It is used to ensure a good bond between an old and a new bituminous surfacing layer. It is normally applied very thin and evenly over the entire surface.


  • To ensure a proper bond between existing surface and the new bituminous course being placed over it
  • To ensure longevity of the road, it is important that the new bituminous surface bonds firmly with underneath surface
  • To coat and bond loose mineral particles on the surface of the surface layer
  • To seal surface pores and make the surface water- resistant
  • To impart structural stability and prevent lateral movement of layers
  • To assist adhesion between the base and super impose surface course


Residue on 600 micron IS sieve % by mass

Max 0.05%

Viscosity @ 50 ⁰C (Saybolt), sec


Storage stability after 24 hours, % Max

Less than 2

Binder – Residue by evaporation % Min.

Min 60 %

Setting Time

~ 20 to 50 min.

Type Of Surface Qty.of Liquid Bituminous Material

Normal bituminous surface

2.0 to 2.5

Dry and Hungry bituminous surface

2.5 to 3.0

Granular surface treated with primer

2.5 to 3.0

Non- Bituminous surface:
(i) Granular base (not primed)

3.5 to 4.0

(ii) Cement concrete pavement

3.0 to 3.5


  • Easy and uniform spray
  • Low temperature cure
  • High adhesive properties
  • Enhances structural strength of layers
  • Prevents lateral movements of structural layers
  • Water resistant and enhances easy drainage of water
  • Provides an impervious layer to prevent water ingress from table below the road layers