Introducing Permabond ET503, our new tough, fast-curing epoxy

George Moore
Epoxy Adhesives, News
April 10, 2024

Permabond is delighted to announce the launch of its new fast-curing two-part epoxy, Permabond ET503. This product has been designed to be especially fast-curing for an epoxy adhesive. It has a fixture time of 6 minutes and reaches a working strength in just 20 minutes. Because of this rapid strength development, you might assume that the adhesive wouldn’t be as strong as other epoxies that cure more slowly. Quite the opposite is true, however – ET503 develops outstanding strength and toughness and offers excellent environmental durability compared to other adhesives in its class.

Permabond ET503 bonds well to many substrates, including woods, metals, ceramics and some plastics (including ABS and polycarbonate.) In addition to it being fast-curing at room temperature, this adhesive will even reach a very high strength when cured at 5°C. This makes it particularly suitable for carrying out bonding and sealing tasks outside in the cold.

Permabond ET503 Fast-Curing Epoxy Key Features & Benefits:

  • Bonds well to a wide variety of substrates
  • Very fast-curing for an epoxy – working cure in 20 minutes
  • Excellent strength and toughness
  • Reaches excellent strength even in temperatures as low as 5°C
  • Excellent environmental durability; great outdoors
  • Resistant to water and humidity
  • 1:1 mix ratio, easy to dispense
  • Solvent-free
  • Cures tack-free
  • Pale, dove grey finish – smart on appliances


ET503 flows quickly when dispensed and is thixotropic. It offers outstanding resistance to water, moisture, and humidity. This makes the adhesive ideal for use in outdoor applications, as it is able to withstand harsh weather conditions. Such is its resistance to water, it can even bond underwater, should the need arise! It also offers resistance against saltwater, a rarity for any adhesive.

ET503 cures fully tack-free in a light grey finish. We find this colour to be smart and highly suitable for use on many appliances. However, if you were seeking a different colour, the adhesive can be sanded and painted over once cured.

Other key features of this product are its 1:1 mix ratio, making it very easy to dispense and use. Additionally, it’s non-flammable, solvent-free and comes in a variety of sizes, including bulk on request.

If you’d like to find out more about this product, download the flyer or please contact us.

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