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4:1 Two Part Thin Epoxy Resin System Kit 1.25 Gallons

Model: 538-Kit

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  • Details
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The Thin Epoxy Resin is a high quality resin system which works well for lamination of Fiberglass, Carbon Fiber or Kevlar. This epoxy has a syrup like consistency and will wet-out materials very quickly. This makes it very easy to work with. The epoxy is low odor. In addition to lamination of materials this epoxy also works very well as a sealer for porous materials such as wood, because of its ability to easily penetrate the materials. Resin viscosity: 600 cps.

This resin uses a 4:1 hardener. Mixing 4 parts epoxy to 1 part hardener will give you the appropriate final mixture.

This is considered to be a fast hardener, Our 2:1 and 3:1 hardener epoxies will cure much slower. However this 4:1 hardener will provide you with the most rigid laminate due to its extremely fast curing time.


Low viscosity and good color
Excellent toughness
Excellent flexibility


Viscosity at 25C/77F:    600 cps 
Color, Gardener:            1 max.
Pounds per gallon:        9.2

Typical physical properties for hardener systems:

4:1 Fast Hardener

Typical Properties


Mix Ratio By Volume, 100 parts resin 25
Mix Ratio By Weight, 100 parts resin 26
Gel Time at 77F, 100 grams, minutes 14-17
Hardness, Barcol, 934-1 32-36
Heat Distortion Temperature C/F 68-71 / 155-160
Tensile Strength, psi 9-10,000
Tensile Elongation, percent 2.2-2.5
Flexural Strength, psi 17-19,000
Flexural Modulus, psi x 10(-5)
Water Absorption, percent by weight
4.5 - 5.0
24 Hours at 25C/77F 0.1 - 0.2
2 Hours at 100C/212F 0.7 - 0.8

Physical properties shown are based upon the following cure schedule: 24 Hours at 77F + 2 Hours at 250F


The information herein in general information designed to assist customers in determining whether our products are suitable for their applications. Our products are intended for sale to industrial and commercial customers. We require customers to inspect and test our products before use and to satisfy themselves as to contents and suitability for their specific applications.

This resin is filled by weight not volume.
Net Weight
8.75lbs/3969 g = aprox 1 Gallon

This hardener is filled by weight not volume.
Net Weight
2.10 lbs/953 g = aprox 1 Quart

Notice: This product may Blush.

The item has a shelf life of approximately one year. To ensure quality results and proper curing, please make sure to use the resin shortly after purchase.

****************** Cold Weather Warning ***************

If your epoxy arrives cold during shipment is must be allowed to acclimate to at least 75° F before using. Mixing this product below 75°F will increase the potential for under-mixed epoxy which will create wet or sticky areas on your surface. Cold temperatures will also trap more very tiny air bubbles during the mixing which cannot always be removed with the torch/heat gun. In addition applying the mixed epoxy in temps below 70 degrees F will drastically extend cure times. To warm the epoxy quickly we recommend using either a heat lamp, an electric heater or placing the closed bottles of epoxy in a tub of warm water for 30 minutes. Getting the epoxy too hot will result in a faster reaction time, so pay careful attention to what you're doing.

****************** Cold Weather Warning ***************

MSDSThin Epoxy Resin SDS

MSDS4:1 Hardener MSDS

 PDF Epoxy Mixing Guide

  • Model: 538-Kit
  • Shipping Weight: 11.3lbs
  • 55 Units in Stock


Vuong Vo
Penetrates and cures rigid like the vinyl ester resin. Quality stuff.