On April 7, 2026, practical technical sharing in the waterproofing industry clarified that the selection of dispersants in waterproof coating production can be quickly determined based on product components, effectively solving problems of water resistance, alkali resistance and construction. For single-component cement-free waterproof coatings (such as Dingbulou and silicone rubber), 5027 ammonium salt dispersant is preferred, featuring excellent water resistance, reducing film whitening and blistering, and ensuring stable waterproofing performance. For two-component cement-based waterproof coatings (such as JS and K11 systems) with strong alkalinity, 5040 sodium salt dispersant is suitable, avoiding ammonia emission and pungent odor, with retarding and water-reducing effects, improving construction smoothness and preventing coating cracking. The core rule is: choose 5027 for single-component without cement, and 5040 for two-component with cement, providing a clear basis for formula design and production, and helping upgrade the quality of waterproof products.
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