Permabond ET538 1:1 Ratio Slow Set 120 - 150 min Two-Part Epoxy Adhesive

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Cartridge or Starter Kit?
Regular price $ 17.99 USD
25 units available
25 units are available

PERMABOND ET538 is a structural, room temperature curing epoxy adhesive that has excellent adhesion to a wide variety of surfaces such as wood, metal, ceramics and many plastic and composite materials. It exhibits good resistance to petrol, oils and water and has an extended cure time making it suitable for larger applications and batch production processes. Its thixotropic "non-slump" nature makes it suitable for gap filling or vertical application.

Features & Benefits

  • Adhesion to a wide variety of substrates
  • Full cure at room temperature
  • Set time 120 - 150 min
  • Easy to apply
  • High shear and peel strength
  • Good impact strength
  • Good chemical resistance
  • Non-drip rheology

Physical Properties of Uncured Adhesive

ET538A ET538B
Chemical Composition Epoxy Resin Polyamine Hardener
Appearance White Dark Grey
Viscosity @ 25°C

20rpm: 50,000- 100,000 mPa.s (cP)

2.5rpm: 150,000- 300,000 mPa.s (cP

20rpm: 20,000- 40,000 mPa.s (cP)

2rpm: 30,000- 90,000 mPa.s (cP)

Specific Gravity 1.1 1.4

Typical Curing Properties

Mix Ratio

1:1 by volume

100:130 by weight

Maximum gap fill 5 mm (0.2 in)
Usable / pot life @ 23°C 120-150 mins
Handling time @ 23°C 3-5 hours
Working strength @ 23°C 24 hours
Full cure @ 23°C 72 hours

Typical Performance of Cured Adhesive

Shear strength*


Steel: 18-20 N/mm² (2600 - 2900 psi)

Zinc: 17-20 N/mm² (2500 - 2900 psi)

Peel strength (aluminium)


60-80 N/25mm (13-18 PIW)



70-80 Shore D

Elongation at break


Glass transition temperature Tg 45-55°C (113-131°F)
Dielectric strength 15-25 kV/ mm
Thermal conductivity 0.55 W/(m.K)