Permabond ET5428 Two-Part Epoxy

Description

Permabond ET5428 is a thixotropic, toughened two-part epoxy mixed at a 2:1 ratio, built to resist impact and vibration better than a standard rigid epoxy. Its controlled flow and gap-filling ability, combined with an easy mix and apply process, make it a practical choice for composite assemblies where the bond line is not perfectly tight.

What sets this toughened two-part epoxy apart from a rigid one

Rigid epoxies bond hard and strong but can crack under repeated shock or vibration, especially on composite panels that flex slightly in service. This adhesive is formulated to absorb that movement instead of fighting it, holding up under impact and vibration while still delivering high shear and peel strength. That combination is why it shows up in composite assembly work rather than only in rigid metal-to-metal joints, and why fabricators reach for it on parts that will see real vibration in use.

Specifications for this toughened two-part epoxy

• Chemistry: Thixotropic, two-part epoxy
• Mix ratio: 2:1
• Performance: High shear and peel strength, rapid cure speed
• Temperature resistance: Retains performance at high temperatures
• Color: Color matched for FRP (fiberglass-reinforced plastic) bonding

Because the mix flows in a controlled way rather than running or slumping, ET5428 is easier to apply on vertical or overhead composite joints than a thin, free-flowing epoxy would be. The gap-filling property also means slight fit-up variation between composite parts does not leave a starved, weak bond line the way it might with a low-viscosity adhesive, which keeps bond quality more consistent across a production run.

Full cure schedules, working time, and shear strength data for this toughened two-part epoxy are published directly by Permabond, the manufacturer, on their technical data sheet.

Browse related epoxy adhesives at Chemical Concepts. For cartridge sizing or composite bonding questions on ET5428, call (800) 220-1966 or email [email protected].