Concrete,Mortar & AdmixturesChina Yl-Snf-a Sodium Naphthalene Sulfonate Formaldehyde (Na2SO4 less than 5%), Find details about China Naphthalene Concrete Admixture, Concrete Admixture from Yl-Snf-a Sodium Naphthalene Sulfonate Formaldehyde (Na2SO4 less than 5%)