This tool should be used as a guide only. Epoxy HR may not be an exact match for Thermaline 400 Finish by but we have given the closest match we can. Epoxy HR should do the same job and have similar properties but you should always read the technical data sheets for both Epoxy HR and Thermaline 400 Finish to be sure. Please see any notes to see any major differences and call us on 01285 862132 if you have any specific questions.