This tool should be used as a guide only. Hardtop HB may not be an exact match for Korethan H.B. UH279 by but we have given the closest match we can. Hardtop HB should do the same job and have similar properties but you should always read the technical data sheets for both Hardtop HB and Korethan H.B. UH279 to be sure. Please see any notes to see any major differences and call us on 01285 862132 if you have any specific questions.