Silmar® 250A Polyester Sanding Resin (Hot-Coat) - One Revolver Surfboards

Silmar® 250A Polyester Sanding Resin (Hot-Coat)

Finish your board with the professional’s choice: Silmar® 250A Polyester Sanding Resin. Manufactured in Hawthorne, California since 1961, Silmar is the undisputed leader in resin quality, providing the crystal-clear, durable finish that defines high-end surfboards.

Commonly referred to as "Hot-Coat" resin, Silmar 250A is pre-formulated with a surfacing agent (wax). Unlike laminating resin, it is designed to cure hard and tack-free, allowing you to sand the surface to a smooth, professional finish without gumming up your sandpaper. It is the go-to choice for final coats and most ding repair applications.

Product Details:

  • Pint or Quart: Includes 0.5 oz MEKP hardener.
  • Gallon or Pail: Does not include MEKP (sold separately).
  • Primary Use: Perfect for hot-coats, glosscoats, and structural ding repairs.
  • Shelf Life: Guaranteed 1-year minimum shelf life.

MEKP Usage Chart

Proper catalyst ratios are essential for a clean, sandable cure. Refer to the chart below for the ideal mixture based on your working temperature.

Silmar 250A MEKP Usage Chart

Pro Tip: Ensure your room temperature is stable. If it's too cold, the wax may not rise to the surface properly, leaving "sticky spots" that are difficult to sand.

$55.00
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Shipping calculated at checkout.
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Order Processing:

Most orders are processed within 1–3 business days (Monday–Friday).

Processing time does not include weekends or holidays.

Where Orders Ship From:

We work with a mix of in-house fulfillment and trusted partner suppliers.

Depending on the item, your order may ship from:


  • Southern California (One Revolver Surfboards HQ)

  • A partner warehouse through Shopify Collective

This helps us offer faster shipping and a wider range of high-quality products.

Shipping Details:


  • Tracking numbers are emailed automatically once your order ships

  • Delivery times vary by carrier and product type (usually 2–7 business days)

  • Multi-item orders may arrive in separate packages

  • Apparel, accessories & small items ship via USPS, UPS, or partner carriers

Surfboard Shipping:


  • Surfboards ship via freight carrier with full insurance

  • Boards are packaged securely for safe transit

  • Typical delivery time: 5–12 business days, depending on region

International Shipping:


  • Delivery times and rates shown at checkout

  • Customs and import fees may apply based on your country

If you have any questions about your order or tracking, feel free to reach out anytime at info@onerevolversurfboards.com.

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