What is the main advantage of using cold applied bitumen?

It is applied directly from the container via brush or spray at room temperature, eliminating the need for dangerous on-site heating.

Can this material be applied to a wet surface?

Solvent-based types must be applied on dry surfaces. Water-based emulsion types can tolerate slight surface dampness, but not free-standing water.

What is the expected drying time for cold applied bitumen?

According to the specification, it should be surface dry within 4 hours and hard dry within 24 hours under standard conditions.

IS 1047

: 1985

Cold applied bituminous waterproofing materials - Specification

CurrentSpecializedSpecificationMaterials Science · Waterproofing and Damp Proofing

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This code specifies the requirements and testing methods for cold-applied bituminous materials (both solvent-based solutions and water-based emulsions) used for waterproofing and damp-proofing. Engineers and contractors use it to govern the quality, drying time, and flexibility of liquid-applied bituminous coatings on foundations, basements, and roofs.

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

Quick Reference Values

Drying time (surface dry), max4 hours

Drying time (hard dry), max24 hours

Flash point for solvent-based (Abel), min30°C

Flexibility at 0°CNo cracking or flaking

Resistance to water (Stripping test)No stripping of bituminous film

Practical Notes

Cold applied bitumen is safer for confined spaces (like basements) as it eliminates the fire hazards and noxious fumes associated with heating solid bitumen.

Solvent-based coatings must only be applied to completely dry surfaces to prevent blistering.

Surfaces should generally be prepared and treated with a compatible bituminous primer (refer to IS 3384) prior to application for optimal adhesion.