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

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* (ISO4587) Steel: 18-20 N/mm² (2600 - 2900 psi) Zinc: 17-20 N/mm² (2500 - 2900 psi) Peel strength (aluminium) (ISO4578) 60-80 N/25mm (13-18 PIW) Hardness (ISO868) 70-80 Shore D Elongation at break (ISO37) 4-8% Glass transition temperature Tg 45-55°C (113-131°F) Dielectric strength 15-25 kV/ mm Thermal conductivity 0.55 W/(m.K)