Grain Surfboard Laminating Tutorial Entropy Resins - A video tutorial on wood surfboard laminating using Entropy Resins' Super Sap CLR epoxy resin over a Grain Surfboard. Super Sap CLR is a clear laminating and coating epoxy resin partially derived from bio-based resources, with a dramatically lowered carbon footprint when compared to traditional epoxy resins. The CLR system with CLF fast hardener is made with UV stabilizers to resist yellowing, is blush free, and relatively quick working times for wet layup laminating of surfboards, boats, and other DIY or industrial applications.