HINCOL Emulsion SS1 astm (Bulk)

HINCOL Emulsion SS1h ASTM (CSS-1h) is used for two primary applications: Tack Coat between bituminous pavement layers on heavy traffic roads, and Fog Seal to rejuvenate and waterproof oxidized pavement surfaces. The “h” designation makes it particularly suitable for hot climates and high-stress pavement zones where standard CSS1 may not perform adequately.

The “h” designation in CSS-1h indicates that the emulsion uses a harder base bitumen. After the emulsion breaks and water evaporates, the residual bitumen has a higher softening point and lower penetration value compared to standard CSS1. This makes the binder film more resistant to deformation at high pavement temperatures common in Indian summers, and stiffer under heavy traffic loading — preventing bleeding, rutting, and loss of skid resistance at the interlayer.

• CSS1 (Standard): Softer base bitumen — suitable for moderate traffic and normal climatic conditions. Used for tack coat and cold mix applications.
• CSS1h (Hard Grade): Harder base bitumen — higher softening point residue. Better performance in hot climates (reduces bleeding risk), better for heavy traffic. Used for tack coat on expressways and fog seal applications.

Both conform to ASTM D2397 and are Cationic Slow Setting emulsions. The choice depends on traffic intensity, pavement temperature, and climate zone.

• Normal bituminous surfaces: 2 – 3 kg per 10 m²
• Dry / hungry surfaces: 2.5 – 3.0 kg per 10 m²
• Granular surfaces with primer: 2.5 – 3.0 kg per 10 m²

Distributor temperature should be maintained between 24–54°C. Application on clean, dry surfaces only.

Yes. CSS-1h is one of the standard recommended grades for Fog Seal applications as per HINCOL’s Application Handbook — along with CSS2 (IS 8887) and SSME (IS 17016). For fog seal, it is diluted 1:1 with water and applied at 0.15–1.0 L/m² depending on surface porosity. Tight/smooth surfaces use the lower rate; open/porous surfaces use the higher rate.

A Fog Seal is a light spray application of diluted bitumen emulsion over an existing pavement surface. It is used to: seal oxidized/aged bituminous surfaces, restore waterproofing, reduce raveling, prevent stone loss from chip seals, and rejuvenate dry and brittle pavement surfaces. CSS1h is particularly effective for fog seal on hot-climate roads where a harder binder reduces the risk of creating a slippery surface from the applied emulsion.

• RS1 (IS 8887): Rapid Setting — breaks very quickly on contact. Applied at 0.2–0.3 kg/m². Standard tack coat for most highway paving in India under IS specifications.
• CSS1h (ASTM D2397): Slow Setting — controlled break. Also applied at 0.2–0.3 kg/m². Preferred where ASTM D2397 is contractually specified, or where harder residue performance is needed for heavy traffic/hot climate conditions.

HINCOL Emulsion SS1h ASTM has a shelf life of 6 months when stored at temperatures between 10°C and 50°C. Never allow to freeze or heat above 85°C. Store in sealed containers away from direct sunlight. The shorter shelf life vs IS 8887 grades (12 months) is characteristic of all ASTM D2397 grades.

CSS1h is typically specified on: World Bank and ADB-funded highway projects where ASTM D2397 is the contractual standard; NHAI expressways in hot-climate zones; State highway projects where consultants specify the harder grade for temperature-critical sections; and on international design-build-operate road concessions following ASTM-based technical specifications.