Comes with hardener paste. Designed for rapid repair of surface damage. Polyester resin has good adhesion to the surface and mechanically resistant. Can be sanded after hardening. It may be trowelable to achieve the required surface smoothness. Resistant to weathering, dilute acids, gasoline, lubricants and oil. Designed to repair car bodies, boats, yachts, camping trailers, also repairs polyester and wooden surfaces.