What is the main application of the adhesive specified in IS 10567?

It is used for fixing expanded polystyrene (EPS) insulation slabs to substrates, typically on roofs for thermal insulation.

What is the minimum required softening point for this adhesive?

The softening point shall not be less than 95 °C when tested by the Ring and Ball method as per IS 1205 (Table 1).

How is the bond strength verified?

A 100mm square EPS block is bonded to a concrete block. After 24 hours, a pull of 2.5 kg is applied. There should be no failure of the bond or the EPS block itself (Clause 5.6).

What is the maximum permissible volatile matter content?

The volatile matter content shall not be more than 30 percent by mass (Table 1).

IS 10567

: 1983

Adhesives for fixing expanded polystyrene slabs

CurrentSpecializedSpecificationMaterials Science · Roofing Materials

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This Indian Standard specifies the requirements and test methods for hot-applied bitumen-based adhesives used for fixing expanded polystyrene (EPS) slabs. It is primarily used for providing thermal insulation on roofs and other parts of buildings, ensuring adequate bond strength and material stability.

Specifies requirements for adhesives used for fixing expanded polystyrene slabs in thermal insulation applications.

Quick Reference Values

Softening Point (Ring & Ball)Not less than 95 °C

Penetration at 25 °C15 to 30

Flash Point (Pensky-Martens)Not less than 200 °C

Volatile MatterNot more than 30 percent by mass

Bond Strength Test LoadNo failure under 2.5 kg pull for 1 minute

Practical Notes

Ensure the substrate (e.g., concrete roof) is clean, dry, and primed before application to achieve the specified bond strength.

This is a hot-applied adhesive. Adhere strictly to the manufacturer's recommended application temperature for safety and performance.

Verify the compatibility of the adhesive with any underlying waterproofing membranes to prevent chemical degradation.