Thioplast G 1 Polysulphide polymer Akzo Nobel-Akcros Chemicals Polysulfides SEALANT Thioplast G 1 is a liquid Polysulphide-Polymer of high viscosity and of light brown colour. Thioplast G 1 is suitable for insulating glass sealants, depending on the special requirements of the user, but also for industrial sealants and specialities. Polysulphide polymer. Used for insulating glass and industrial sealants. Offers high viscosity and light brown colour.