Starting Formulation Epoxy Adhesive

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The starting formulation epoxy adhesive film formula can vary depending on the specific application and desired properties. However, here is a starting formulation for a typical two-component epoxy adhesive:

Epoxy Resin Component:

  • Epoxy Resin: The main component of the epoxy adhesive formulation is the epoxy resin. Epoxy resins are typically derived from bisphenol A (BPA) or bisphenol F (BPF). The specific type of epoxy resin used will depend on the desired properties of the adhesive.

Hardener Component:

  • Hardener: The hardener, also known as the curing agent or catalyst, is the second component of the epoxy adhesive formulation. It reacts with the epoxy resin to initiate the curing process. Common types of hardeners include aliphatic amines, aromatic amines, polyamides, or anhydrides. The choice of hardener depends on factors such as desired cure speed, temperature resistance, and final properties of the adhesive.


  • Fillers: Fillers can be added to the epoxy adhesive formulation to modify properties such as viscosity, strength, flexibility, and impact resistance. Examples of fillers include silica, calcium carbonate, talc, or glass fibers. Fillers can also enhance dimensional stability and reduce shrinkage during curing.
  • Plasticizers: In some formulations, plasticizers may be added to improve the flexibility and impact resistance of the cured adhesive. They help reduce brittleness and increase the adhesive’s ability to withstand dynamic loads and thermal cycling.
  • Adhesion Promoters: Adhesion promoters may be included in the formulation to improve the bond strength between the adhesive and specific substrates. These additives enhance the adhesion properties of the epoxy adhesive to various materials.
  • UV Stabilizers: UV stabilizers can be incorporated to enhance the adhesive’s resistance to UV radiation and improve its long-term durability when exposed to sunlight.

Epoxy product making guide

The most important point is that  the specific proportions and types of components in an starting formulation epoxy adhesive film formula can vary depending on the desired properties and intended use. Manufacturers often develop proprietary formulations with tailored characteristics to meet specific application needs.

It’s recommended to follow the CFS formulator’s instructions for the specific epoxy adhesive product you are using, as different products may have slightly different formulation requirements and consideration.