Cordobond is a two-component epoxy resin and consists of a unique composition of resin and hardener. After combining the two components a chemical reaction occurs, resulting in a thermos hardening resin that is capable of hardening using its own heat. This prevents shrinkage and layer thickness remains at 100%. When used on polyester, however, some shrinkage might occur due to the evaporation of solvents that are used as hardener in the polyester.