... -toxic,no pollution, 2.anti-mildew, anticorrosion 3.waterproof, good resistance to oil,acid,alkali Polysulfide sealant manufacturers,we are a big ... mix ratio 12:1 to 10:1. The polysulfide sealant used for waterproof joint sealing or caulking insubway,tunnel, ... supplyand drainage system.The sealant is a netural substance, main characters:1.non-toxic,no pollution,2.anti-mildew, anticorrosion3.waterproof, ...