Best Epoxy Resin for Glassing a Surfboard & Ding Repair

If you’re getting into shaping your own surfboards or doing some ding repair, epoxy resin is the way to go.

It’s easy to work with, less toxic, and it’s even available in BIO-based formulas from a handful of different suppliers.

Resin Research makes some quality epoxy resin in a variety of kit sizes that are the perfect solution for minor ding repair or full on surfboard lamination and hot coat jobs.

Safe to use on both EPS and PU foam.

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Resin Research Epoxy for Surfboard Shaping & Ding Repair

Resin Research epoxy is super easy to work with if you’re new to shaping or repairing your own boards.

It’s easy to mix (either by volume or by weight), cures well, and sands well.

You can also pick up something called Additive F from Resin Research that can be added to the mix to eliminate amine blushing and peeling, make saturating your fiberglass easier, and help eliminate fish eyes and blemished during the hot coat.

Key features:

  • UV stabilizers.
  • Blue tint in the bottle, but cures clear.
  • 2:1 mix ratio by volume.
  • Odorless.
  • Safe to work with.
  • VOC free with low toxicity.
  • Medium viscosity.
  • High gloss.

Fast hardeners have a pot life of about 18-25 minutes and set within 2-3 hours at 77°F.

Slow hardeners have a pot life of about 40-50 minutes and set within about 4-6 hours at 77°F.

The pot life indicates how long the epoxy and hardener will last while mixed in your mixing bucket.

The set time indicates when you’ll be ready to flip or sand the board.

If you’re making a shortboard, a 96oz kit should be enough epoxy.

If you’re making a longboard, a 1.5 gallon kit is a good choice.

Longer longboards or sups will likely need a 3 gallon kit.

If you just need some epoxy for ding repair, a small 48oz kit will do just fine.

Slow Hardener vs. Fast Hardener Epoxy?

Epoxy resins are available with a variety of different hardeners that typically range from extra fast or fast to slow or extra slow.

The speed of the hardener will determine how long you’ll have to work with the epoxy once it’s mixed and how long it will take before it sets up so you can continue working with it.

If you’re new to working with epoxy, here are some useful tips:

  • A faster hardener will typically suffice for shorter boards and the hot coat stage or ding repairs.
  • A slower hardener can help during the lamination phase if your work slow or you’re glassing a large surfboard.
  • A slower hardener can be a good choice if your working in particularly hot temperatures (above 80°F).
  • A “Quick Kick” epoxy will be useful once you gain some more experience, when you’re doing a hot coat, or if you’re working in colder temperatures.

Epoxy Resin vs. Polyester Resin for Glassing a Surfboards

If you’re a homebuilder, epoxy resin is a good choice over polyester resin. Here’s why:

  • Epoxy is less toxic and safer to work with than polyester resin.
  • Polyester resins tend to be a little more porous than epoxies and degrade quicker.
  • Epoxies are stronger than polyester resin.
  • Epoxy can be used on PU or EPS, while polyester resin will melt EPS foam.

Epoxy resin will typically be a little more expensive than polyester resins, but the benefits certainly justify the cost.

Resin Research Epoxy Options

The right amount of epoxy and the harden speed you need will depend on the size of your job.

The bigger the job, the more epoxy you’ll need. If you’re new to surfboard shaping and are making a longboard or SUP, a slow hardener may come in handy during the lamination stage.

When in doubt, pick up a little more epoxy than you think you’ll need.

In addition to the 1.5 gallon fast hardener epoxy kit, some other great choices for the best surfboard epoxy from Resin Research include:

Resin Research 48 oz Fast Cure Epoxy Kit

Good choice for ding repairs, fin work, or small jobs.

Resin Research 96oz Fast Cure Epoxy Kit

Good choice for shorter boards.

Resin Research 1.5 Gallon 2000CE Slow Cure Epoxy Kit

Good choice for longer boards or if you want some back up epoxy in your workshop.

Get started on that ding repair, lamination, or hot coat with some easy-to-use epoxy

Resin Research is a solid choice whether you’re on your first board or ding repair or you’re in the double digits.

For a more eco-friendly option, check out their line of BIO-based epoxies. And be sure to pick up some Additive F to make saturating and sanding way easier.

After your resin has cured, you’ll need a good surfboard sander as well as some other shaping supplies. Check out our recommendations!

Do you have experiences with any of the epoxy resins described above? Maybe you’re a fan of something we’ve missed? Let us know in the comments below!

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