ISO-NPG resin

In isophthalic polyester resins, one uses propylene glycol. Once you replace all or part of it with neopentyl glycol, you get resins with even better hydrolysis resistance. In addition, these resins, which are composed of both isophthalic and neopentylglycol, are heat-resistant and show good adhesion to PVC. For more info, see: https://www.v-sure.eu/en/h35-iso-resin-lse-5-kg