Guide to High Temperature Epoxy Resin – Is Epoxy Heat Resistant

Updated: 11 Jul 2023


Epoxy resin become an invaluable asset in a variety of ways. You can use these to protect your tiny jewelry to a boat and your floors. It can also be used in high-class industries like aerospace, electronics, manufacturing, and automotive for gadget protection. But it always is hard to choose the right resin especially when you are looking for heat-resistant epoxy.

Is Epoxy Heat Resistant?

Yes, the resin is heat resistant but not all of its properties do the same. The heat amount depends upon the brand and intended purpose of the gadget.

Your smaller project DIY resin with stand with heat to some extent. High-temperature epoxy is different from other ordinary and DIY epoxy. These are specially designed to withstand heat at high temperatures. The higher temperature does not change the shape of the resin. Whether it is to withstand a high environment when needed. Smaller to higher products are highly available in the market for your use like resin coasters to epoxy countertops.


What Does High-Temperature Epoxy Mean?

DIY epoxy project withstands low temperatures between 68°F to 195° F (20°C to 90° C). A small change in these temperatures can change the molecular structure and make the epoxy soften. To retain our resin its glass-like surface heat it under normal temperatures.

High-heat resin epoxy withstands higher temperatures up to 315 °C (600° F). These epoxy are specially formulated to bear high temp at industrial and manufacturing levels. The quartz in resin makes it bear temperature. Some aircraft manufacturing can cope with temperatures up to over 2700°F (up to 1500°C).

Where does High Temp Epoxy Resin use?

High-heat resins are specially formulated to use in industrial or large projects like boats or countertops. In industry, it can be used for the repair of many appliances like electronics, motor vehicles, electrical repair, and so on. These epoxies are highly durable and long-lasting with heat.

The Best Heat Resistant Epoxy

Some branded epoxy resin heat resistance can be used to bear high-pressure heat. Some of them are discussed below for your guidelines.

Stone Coat Epoxy

Stone coat epoxy can use on various home and DIY projects. You can use it on multiple surface types. This product has a mixing ration of 2:1 and cures within 24 hours. It can also be used on countertops, kitchens, bathrooms floors, or any surface that repair with epoxy. This epoxy withstands high heat.


  • High level of Stability and Durability
  • Heat and flame Resistant
  • Give a Spectacular finish
  • You Get a Perfect Smooth Level
  • Easy 2:1 Mixing Ratio
  • Zero VOCs
  • Food Safe Make to use in Kitchen as well
  • UV Resistant


  • A little expansive
  • Long Curing Time
  • Sometimes Slightly Yellow tint

Deep Pour Epoxy Resin

Deep pour resin is used for deep curings like countertops, jewelry, stone and live edge, coffee, and river tables. This epoxy cures your surface up to 2 inches within no time.

This resin’s slow curing time allows you to have more working time. The deep pour is not flexible and you need to support your project properly before use. This product produces a low number of bubbles and it pure very smoothly.

It can handle 75 to 85 degree Fahrenheit temperature. It can also be used as food-safe epoxy in your kitchen. You can use it in multiple pigments and colors for your projects. It can be the perfect choice for your DIY and Professional projects.


  • Cure up to 2 Inches
  • Cure 18 to 24 Hours
  • Water and Heat Resistant
  • Give Crystal-clear finish
  • Food-safe
  • Water-resistant
  • Low Odor
  • Self-leveling


  • Cause bubbles when working in warm temperature
  • Cannot mix with oil-based products

J-B Weld High Heat Epoxy Syringe

J-B Weld epoxy is long-lasting and heat resistant and handles up to 550°F. Its permanent bond makes heat and chemical resistant. At room temperature, it can cure within 24 hours. Two-part epoxy resin makes durable and flexible resin in no time.

You can use it on metal, plastic, wood and PVC, tiles, and ceramic. Most important it can also use in fiberglass products and surfaces.


  • Well Cure Time
  • It has more strength
  • Used on all Surface
  • Cure at Room-temperature


  • Low Price
  • Used for small spaces

How to Work With Heat Resistant Resin

High-heat epoxy resin mix in 2:1 for use on surfaces. You can use any help material for good mixing best electric drill and any other mixing gadget.

Before curing make sure the surface is dust-free and remove any debris. Any small item on the surface makes your surface negatively affect by epoxy.

Use a towel and a soft brush to spread the resin. This will level the surface automatically when added. Use a heat gun above 3 4 cm to remove any bubbles or make them smooth. This epoxy is cured within 24 hours and useful within 72 hours.

What Can Reduce Temperature Resistance?

Resin is heat resistant and will stand with daily wear and tear. However, some factors make epoxy less temp resistant. This includes:

  • Not proper mixing resin and hardener: It is recommended to mix both for 5 minutes. This allows it to mix thoroughly and strongly. While mixing scrape the sides and bottom of the mixing container.
  • Adding pigments, alcohol inks, or color pastes: Adding any of these can lower your heat resistance while finishing your epoxy project. Follow manufacturer instructions with care or ask the supplier for the use of these mixing materials. Constant contact with heat can reduce its resistance.
  • Not using the correct mixing ratio: Different brands has different mixing ratio for use. Read the instruction and add mixing with 1:1, some resin has a mixing ratio of 2:1 and 3:1.
  • Not waiting until the epoxy has fully cured: Apply excessive resin before fully curing making it affect the curing and make the epoxy less cured.

Advantages While Working With Stone Coat Epoxy

Stone coat epoxy resin has the best heat solvent properties. Some main advantages are as follows:

Do you want to repair your old coffee table or countertops? Why not do it with DIY Epoxy with a great deal of saving money?

  • This work in any environment.
  • The stone coat does not contain any VOCs.
  • It will give you a stretch-free and durable surface.
  • Countertops and coffee tables now withstand any temperatures.
  • This gives a crystal clear surface.

Simple Steps to Follow While Working with Heat-Resistance

  • Mixing epoxy and hardener with the needed ratio.
  • Thoroughly mix your additives mixing thoroughly and with the proper time.
  • Sand the surface and remove dust with dust clothes.
  • After the Color coat, remove bubbles if any with any soft stick and material.
  • It will cure within 24 hours.
  • It will be ready for use with proper care.

Common Question and Answer

Are epoxy countertops heat-resistant?

Yes, countertops with epoxies are heat resistant. The countertops you use in the kitchen and other surfaces are also food and kids-safe. These give long durable and flexibility in their ease.

What is the best heat-resistant epoxy resin?

Stone coat epoxy resin is the best resin for heat resistance. It allows you to mix a 2:1 ratio. The high-heat epoxy resin cure within 24 hours and can be ready for wear and tear. This is the perfect use for a DIY project and anyone can use it with proper care.

Is resin heat resistant?

Yes, every epoxy’s heat resistant. Some epoxy cured at 68°F to 195° F (20°C to 90° C). And somewhere cured at some high temp with up to 315 °C (600° F).

What temperature is heat deflection in epoxy?

100°F to 130°F. For example, some gadgets are softer than normal and are not for use. Even at this temperature a cup fingernail break with normal touch.

What does high-temperature epoxy mean?

Epoxy resin heat resistance is specially designed to bear high temperatures. It can use in industrial applications like electronics repair, aircraft, and motor vehicle repair devices.


The resin heat resistance is a special epoxy that withstands even high temperatures without changing the shapes of the surface. This advantage makes it useable in heavy areas like motor repair, aircraft, and industrial manufacturing.  

Using epoxy heat resistance in your project makes it more durable and long-lasting in heat. It withstands in every environment where any adhesive does not stay. This advantage makes it a unique choice for projects that involve thermal stresses, or continuous exposure to extreme temperatures.

In addition, epoxy heat resistance also exhibits thermal shocks and withstands rapid changes in temperature. It also has excellent electrical insulation properties. It also is resistant to chemical exposure.

Nouman Ali

Nouman Ali

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