Perma Construction Aids Pvt. Ltd. Offers High Range Diluents for Epoxy and Polyurethane Systems. Perma Construction Aids Pvt. Ltd. Is an ISO 9001:2000 certified company. The model name of High Range Diluents for Epoxy and Polyurethane Systems is Master Plast. The High Range Diluents for Epoxy and Polyurethane Systems is a high range plasticizer / diluents for epoxy, polyurethane and Polysulphide system. The High Range Diluents for Epoxy and Polyurethane Systems is used for use with epoxy, polyurethane and Polysulphide based systems. The coverage area of High Range Diluent is 5 to 10 percent by weight of epoxy / polyurethane base and reactor. It is available in 1 liter packs.