BioPoxy 36

Bio-Based, High Performance Laminating Epoxy Resin

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BioPoxy 36 is Formulated to Manufacture High-Performance Structures

BioPoxy® 36 is a two-component epoxy system developed for open mold lamination. The system cures at room temperature and is suitable for manufacturing composite parts and non-critical structures using a wet layup fabrication method.

BioPoxy® 36 will wet out and bond to fiberglass, carbon fiber, and natural fiber reinforcements. Used as directed with EcoPoxy’s GelCoat, BioPoxy® 36 is part of a complete system for composites fabrication.

EcoPoxy is committed to creating 100% solids epoxy systems made with high bio-based carbon content materials that deliver exceptional results.

Used to Create

  • Composite Parts
  • Coating Wooden Boats
  • Carbon Fiber Wet Layup and Repair
  • Molding
  • Vacuum Bagging

BioPoxy 36 Features

BioPoxy 36 has been designed for coating and reinforcing fabric saturation in wood composite boat building.

Durable Laminating Properties

This system exhibits excellent cured mechanical properties providing stronger, lighter, higher performance parts that can be sanded, shaped, machined, drilled, and tapped. It can be used in combination with EcoPoxy GelCoat or to make rigid molds and tooling.

A Woodworker’s Favorite

BioPoxy 36 is commonly used for structural wood construction. It may be used for: all woods laminations, coating, scarfing, strip planking, as well as bonding in form of fillet joints applications when filled with wood flour and silica.

Safe & Bio-Based

BioPoxy 36 is bio-based and safe to store around the house. Our resins can be used in educational institutions and schools.

Other BioPoxy 36 Features

  • No Toxic Organic Compounds or Heavy Metals
  • Excellent Chemical Resistance and Hardness
  • 100% Solids, Low VOC, Low Odor
  • High Adhesion
  • Low Viscosity

BioPoxy 36 Product Information


BioPoxy® 36 is formulated to have a 4:1 resin to hardener mix ratio by volume. Deviation from the mix ratio can result in lower mechanical properties or incomplete cure.

Mix Ratio by Volume


Mix Ratio by Mass



BioPoxy® 36 is a thermosetting resin and will generate heat as it cures. Reactivity level is a qualitative indicator of the rate of reaction and temperature of the resin system’s cure. Gel time is the point at which the mixed resin gels or becomes so viscous that it can no longer be worked. Peak exotherm is the maximum temperature observed during cure, and Time to peak exotherm is the length of time between initial mixing and observation of the peak exotherm temperature. The reactivity of the resin system can be affected by factors such as part thickness, the temperature of resin and hardener before mixing, ambient conditions, and the ability of the mold to release heat.

Reactivity Level


Gel Time (100 g)

20 min

Peak Exotherm Temperature

188℃ (370℉)

Time to Peak Exotherm

23 min

Processing Characteristics

Working time is the time during which the resin has been mixed and can still be manipulated with a brush or roller.

Tacky to touch is the period where a second laminate schedule can be applied without the need to abrade the surface of the first layer for adhesion. After lightly touching the surface of the laminate, a glove print remains; resin does not stick to the glove and the surface does not significantly deform.

Set to touch is the point in time immediately after the tacky to touch period, where the surface of the laminate is tack-free. Using the same method as tacky to touch, no glove print should remain after lightly touching the surface of the laminate. Laminating a second schedule is not recommended without abrading the surface of the first layer.

Demolding time is the point in time at which the laminate has cured sufficiently such that the mold is no longer required to hold part’s shape. Laminates can be demolded when a wedge can be inserted under one corner of the laminate with no observable deformation once the wedge is removed.

Full cure is the point in time when the laminate achieves full mechanical properties.

The table below shows Working Time, Tacky to Touch, Set to Touch, Demolding Time and Full Cure for a 11” x 11” x 1/8” thick laminate. Processing characteristics will vary depending on factors such as part thickness, part geometry, ambient conditions, and mold materials.

Working Time Limit

30 – 40 min

Tacky to Touch Period

1.5 – 3 hours

Set to Touch

3 hours

Demolding Time

6 hours

Full Cure

7 days


Store in a cool, dry, well-ventilated location out of direct sunlight. Protect from freezing and physical damage. Do not store in a location subject to frequent temperature changes as the product may crystallize. Use product as soon as possible after opening. If storing remainder of product for another project, keep container tightly closed.

Ideal working temperature

22℃ (72℉)

Recommended working temperature

20 - 25℃ (68 - 77℉)

Recommended storage temperature

15 - 25℃ (59 - 77℉)

Shelf Life

2 years; unopened


Consult Safety Data Sheet (SDS) before use. Wear protective gloves, clothing and eye/face protection. Use only in well ventilated areas. Avoid contact with the skin and eyes. Take off contaminated clothing and wash before reuse. Keep containers tightly sealed when not in use. Avoid breathing dust, vapors and fumes. Wash hands thoroughly after handling. During post-finishing wear proper PPE and avoid dust. When fully cured, BioPoxy® 36 is an inert plastic.

How To Use BioPoxy 36

Mixed epoxy will cure rapidly if left in pail. Have your mold or surface ready, and begin using BioPoxy immediately after mixing. Mix resin and hardener separately for 30 seconds. In a clean, dry container; combine (by volume) 4 parts resin with 1 part hardener, and mix thoroughly for 5 minutes.

The working area should be clean, dry, and free of dust or insects. BioPoxy 36 is compatible with most lay-up fabrics, including fiberglass, carbon fiber, Kevlar, hemp fiber, and more. It can be applied using a variety of techniques, from rollers to spray applicators. BioPoxy 36 can be used in molds with or without vacuum-bagging, and also works great for repairs.

Reapplying Coats

For best adhesion between layers, wait 1.5-3 hours between applications. If more than 3 hours have elapsed since the previous application, it may be necessary to sand with 180 grit sandpaper, then wipe down lint-free cloth and alcohol before continuing.

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BioPoxy 36 Data Sheets

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