Liquid Epoxy - One or Two Part?

Selecting an epoxy for a given application involves many criteria, generally starting with a determination of the surfaces to be bonded and factoring in desired mechanical, electrical, and thermal properties. Process and storage criteria also play a critical role. Most of the time, these pre-determined requirements will naturally drive to a one or two part epoxy. Just as in politics, the best choice normally comes down to a bipartisan compromise. What are the choices? Here is a brief summary table:


Two-Part Epoxy

One-Part Epoxy

Storage

Room Temperature

Cold (Preferably -40°C)

Mixing

Required

Not Required

Work Life @ Room Temp.

Minutes To Hours

Hours To Weeks

Cure Temperature

Ambient to 80°C

80°C to 180°C

Cure Time

48 Hours to < 1 Hour (Heated)

< 1 Hour

These are general guidelines and there are exceptions in virtually every category. But if user mixing is a non-starter, then one-part is the only way to go. Conversely, if ambient cure is required, two-part is the best option.

Both
one and two-part products are listed on this website. Within these broad categories many variations are available in terms of physical properties and process options. With regard to one-part systems, there are also the B-staged film adhesives. This website lists only a representative sampling of available products. In many cases a custom formulation can be developed. Whether a perfect fit is found or not off the shelf, it’s best to contact us with your requirements and we’ll help determine the optimum solution.

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