877-259-1669 info@resinlab.com Adhesives Encapsulants Services Resources About Contact Us Request a Quote Resin Crystallization Resin crystallization can occur in almost any epoxy resin or curing agent as well as many polyurethane resins. Recognizing the phenomenon can help you ensure your material is properly prepared before attempting a cure. What is resin crystallization? Crystallization is the natural solid state of a product Resins and hardeners can all experience crystallization It primarily occurs with two component systems, but can also occur in one component heat cure resins Crystallization does not mean defective material How to recognize resin crystallization? Cloudiness, free floating crystals, crystal masses, or completely solidified material What causes resin crystallization? High purity of material Low viscosity of material Impurities Extreme cold temperatures (-40 °C) Temperature fluctuations How can you reverse resin crystallization? Heat crystallized material between 50 to 60 °C for 1 to 2 hours. Container size will affect the length of time needed for decrystallization. Stir material including container sides and bottom to ensure all crystals have been melted and that heat has been evenly distributed. If crystals are still present, continue heating and repeat stir process until there is no evidence of crystals. While reversing crystallization can be effective for some resins, avoid this method with one component heat cure resins, which cannot be heated to reverse crystallization as product damage may occur. For more information on resin crystallization, connect with an experienced ResinLab representative. Contact Us Adhesives Encapsulants Services Resources Request a Quote About Careers Terms & Conditions Privacy Policy GHS Statement 877-259-1669 info@resinlab.com N109 W13300 Ellsworth Drive Germantown, WI 53022 © 2021 RESINLAB LLC, ALL RIGHTS RESERVED This site uses cookies to provide you with the best possible experience. By clicking 'Accept', you read our Privacy Policy and consent to our terms, including the use of cookies. ACCEPT