Silmar® 249A Polyester Laminating Resin

Silmar® 249A Polyester Laminating Resin is the industry-standard resin used for fiberglass lamination in surfboard construction. Known for its exceptional clarity, reliable wet-out, and consistent performance, Silmar 249A has been trusted by professional surfboard builders and backyard shapers for decades.

Laminating resin is formulated to cure with a tacky surface, allowing additional fiberglass layers and hot coats to chemically bond without sanding between applications. When combined with polyester surfacing agent (wax solution), Silmar 249A can also be converted into sanding (hot-coat) resin.

Manufactured in Hawthorne, California since 1961, Silmar resins have earned a reputation as some of the highest-quality polyester resins available to the surfboard industry.

Features

• Premium polyester laminating resin for surfboard manufacturing
• Excellent fiberglass wet-out and clarity
• Designed to cure tacky for superior layer adhesion
• Can be converted into sanding (hot-coat) resin with surfacing agent
• Trusted by professional surfboard builders for decades
• Manufactured in California since 1961

Available Sizes

Includes MEKP Catalyst
• Pint – Includes 0.5 oz MEKP catalyst
• Quart – Includes 0.5 oz MEKP catalyst

MEKP Not Included
• Gallon
• Pail

MEKP Catalyst Information

MEKP catalyst (hardener) is required for curing polyester resin and may need to be purchased separately depending on the size selected. Please refer to the MEKP Usage Chart for recommended catalyst ratios based on temperature and working conditions.

Shelf Life

Minimum shelf life: 1 year when stored properly.