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Castolite will be moving to a new facility between 7/17 - 7/24. We are asking our customers and vendors to please be patient with us during this transitional time. 

Orders may run a day or two later than usual to ship. 


Castolite provides resins primarily for Casting, Encapsulation, Laminating, Moldmaking and Coating. We provide custom marine grade gel coat used in boat manufacturing and repairs, water slides, pools and many more applications. Choose from thousands of premade colors or request a custom color match at no extra charge. We stock numerous grades of fiberglass fabrics for repair or custom fabrication such as CS Mat, woven fabrics, cofabs, biaxials and chopped strands.

Our Mission

Castolite is the leading provider of liquid polyester resin formulas, marine grade gel coats, custom colorant producer and supplier of fiberglass materials. We provide expert advice and guidance to our customers to ensure superb results that will last a lifetime.

Contact Information

Castolite prefers telephone contact, as the many varied products are tailored to specific applications.  The expert employees at Castolite will ensure that the right products are delivered to meet each customer's specific need.  Office hours are from 8am - 4:30 pm M-F Central Time Zone.  

Customers may pick up orders by APPOINTMENT ONLY.  Please call us.

Postal address
PO Box 190, Lemont, IL. 60439
General Information: info@castolite.com
Sales: 1-708-224-9980
Customer Support: 1-708-224-9980
Webmaster: info@castolite.com
Send mail to info@castolite.com with questions or comments about this web site.
Last modified: 01/02/2024

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