JS Waterproof Coating Defoamer｜Self-Emulsifying Technology｜Chemi Tech

JS waterproof coatings, combining emulsions and cement, face bubble entrapment in high-viscosity mixtures, leading to pinholes and leakage paths. Chemi Tech’s KM-220 integrates self-emulsifying technology with a polyether-siloxane hybrid structure:

Self-Dispersing: Spontaneously disperses in aqueous systems without mechanical stirring (compatible with pH 8–12).

High-Viscosity Penetration: Low-MW polyether chains (MW 2000) accelerate bubble rupture, 3× faster than traditional products.

Cement Compatibility: Resists stratification cause by inorganic powder reactions.

Case Study: Subway Tunnel Waterproofing

Microfoam from two-component mixing created pinholes (≥5% area coverage) in a tunnel project. After adding 0.4%KM-220:

Wet-film bubbles reduced by 95%, eliminating pinholes

Tensile strength increased by 22% (to 2.8 MPa)

Maintained defoaming activity at 50°C, cutting period by 30%

The solution is also used in roof waterproofing membranes, enabling single-pass bubble-free application.