Mastic vs Epoxy coatings

Mastic vs Epoxy coatings

Mastic and epoxy are both types of adhesives used in various construction and industrial applications, but they have different compositions and properties which make them suitable for different uses. Often for industrial use you will see coatings that have both mastic and epoxy in them as the properties of both tend to play well together for repairs and coatings.



  1. Composition: Mastic is a general term for a type of gooey adhesive made from organic compounds, typically resins. It can be a naturally occurring resin extracted from trees or a synthetic resin.
  2. Properties:
    • Flexibility: Mastic remains flexible after application, which makes it suitable for surfaces that might expand or contract.
    • Water Resistance: Mastic can be water-resistant but not always waterproof.
    • Application: Often used for tiling, especially in bathrooms and kitchens, for its strong adhesion to ceramics and ability to resist mild water exposure.
  3. Suitability:
    • Ideal for wall tiles or floor tiles in areas without heavy foot traffic.
    • Not recommended for high-strength bonding or heavy-duty applications.



  1. Composition: Epoxy is a synthetic thermosetting polymer that cures when mixed with a hardening agent. It’s made up of epoxide resin and a polyamine hardener.
  2. Properties:
    • Strength: Epoxy forms a very hard and durable bond, which is highly resistant to chemicals and temperature changes.
    • Waterproof: Once cured, it is generally waterproof and can withstand harsh environmental conditions.
    • Application: Used in a wide range of applications including heavy-duty industrial bonding, coating for floors and metals, and as a structural adhesive.
  3. Suitability:
    • Ideal for bonding materials in high-stress situations, like industrial machinery or load-bearing structures.
    • Often used in flooring applications for its durability and resistance to wear and chemicals.

In summary, while both mastic and epoxy can be used as adhesives, mastic is more suitable for lighter, more flexible applications where water exposure is minimal, and epoxy is preferred for stronger, more durable, and waterproof bonding in both industrial and heavy-duty residential applications.

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