ADEKA NATE B-328F is a powder defoamer developed for cement and concrete products. Since water dispersion or dissolved powder products (polyvinyl alcohol, cement, gypsum, etc.) need to be pre-mixed, to solve the problem of foam when mixing with water in the production of cement and mortar products, and reduce the surface uneven. In particular, the temperature dependence of the defoamer of B-328F/B-319F is very small, and stable defoamer effect can be obtained.