Humbrol Precision Poly Cement - 30ml Bottle. Usage A solvent-based cement suitable for plastic model kits only. Its viscosity is low to enable precision delivery of fine amounts of cement. Substrate Common plastics used to manufacture model kits including polystyrene and ABS. The product works by melting the plastic on application and 'welding' two glued pieces of plastic together to form a strong bond. Coverage Depends on thickness of application. Application Directly onto plastic model kits. Features a very thin tube to deliver the product sparingly to small areas. Drying time Surface dry in 10-20 minutes. Fully dry in 1 hour. Drying times will vary according to ambient temperature and humidity. How to clean: Can be removed if not fully dry by re-dissolving with Liquid Poly or more Poly Cement. Permanent once dry.