This tool should be used as a guide only. Jota Armour may not be an exact match for Devran 237 by but we have given the closest match we can. Jota Armour should do the same job and have similar properties but you should always read the technical data sheets for both Jota Armour and Devran 237 to be sure. Please see any notes to see any major differences and call us on 01285 862132 if you have any specific questions.