What structures is this material typically used on?

It is primarily used for damp-proofing and waterproofing of flat roofs, basements, retaining walls, and building foundations.

Which Indian Standards are used to test the physical properties of this bitumen?

Tests are conducted as per the IS 1200 series, notably IS 1203 for Penetration, IS 1205 for Softening Point, and IS 1209 for Flash Point.

Why is the flash point limit important?

Since the material is hot-applied, a minimum flash point (usually >175°C) is specified to prevent fire hazards during heating at the construction site.

IS 1046

: 1985

Hot applied bituminous waterproofing materials - Specification

CurrentSpecializedSpecificationMaterials Science · Waterproofing and Damp Proofing

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This standard lays down the specifications and physical requirements for hot-applied bituminous materials used in waterproofing and damp-proofing of buildings. It ensures the material has the correct penetration, softening point, and safety characteristics (flash point) to prevent water ingress effectively.

Specifies requirements for various types of hot-applied bituminous materials used for waterproofing purposes.

Quick Reference Values

Penetration test standard temperature25°C

Minimum Flash Point (Cleveland Open Cup)175°C

Maximum Loss on Heating1% by mass

Practical Notes

Overheating the bitumen at the site can severely degrade its chemical properties, leading to premature brittleness and failure of the waterproofing layer.

The substrate must be thoroughly cleaned, structurally sound, and completely dry before application. Moisture trapped under the hot bitumen will cause blistering.