Silmar Surfboard Resin 249A Gallon

Silmar 249A Surfboard Laminating Resin

Silmar 249A is one of the most widely used polyester laminating resins in the surfboard industry. Engineered specifically for surfboard construction, this premium low-viscosity resin provides exceptional fiberglass wet-out, excellent clarity, and a strong, lightweight laminate.

Its thin consistency allows fiberglass cloth to saturate quickly and thoroughly, helping eliminate dry spots while creating a smooth, professional-quality finish. Silmar 249A contains no wax, making it ideal for laminating applications where additional fiberglass layers or hot coats will be applied.

The resin features a slight blue tint in liquid form but cures to a clear, hard, durable finish. After laminating, a waxed hot coat resin or wax additive can be applied to create a fully cured, sandable, and polishable surface.

Product Features

• Industry-standard surfboard laminating resin
• Low-viscosity formula for excellent fiberglass wet-out
• Produces strong, lightweight laminates
• Cures clear with excellent transparency
• Non-waxed formulation for multi-layer laminations
• Easy sanding and finishing characteristics
• Trusted by professional surfboard builders
• Compatible with fiberglass cloth and composite reinforcements
• Requires MEKP catalyst for curing

Common Applications

• Surfboard construction
• Surfboard repairs
• Fiberglass laminating
• Composite fabrication
• Marine fiberglass projects
• Hobby and custom fiberglass parts
• Hand lay-up fiberglass applications

Catalyst Information

Silmar 249A requires MEKP catalyst for proper curing.

Typical Recommendation:

• 1% catalyst (approximately 10cc per quart)
• Approximately 20 minutes of working time at 77°F

Working times will vary based on temperature, humidity, catalyst percentage, and material mass.

Hardener Options

We offer several MEKP catalyst sizes to accommodate different project requirements:

• 15cc – Suitable for approximately one quart at 2%
• 30cc – Suitable for approximately one gallon at 3/4%
• 60cc – Suitable for approximately one gallon at 2%

For temperatures below 75°F, we recommend selecting the 60cc catalyst option to ensure adequate catalyst is available.

Important Note

Silmar 249A is a laminating resin and does not contain wax. For final coats that require sanding and polishing, a wax additive or hot coat resin must be used to achieve a fully cured, tack-free surface.

Need help selecting the proper catalyst or fiberglass reinforcement? Contact Fiberglass Supply Depot at 772-464-0808.

Click For MEK-P Catalyst Chart