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A two-component adhesive consists of a resin (component A) and a hardener (component B). Once mixed in the specified ratio, a chemical reaction starts and the adhesive cures uniformly through its whole thickness without needing moisture or heat — ideal for thick layers, closed joints and structural bonding.
Main types
- 2K epoxy: highest shear strength and chemical resistance; rigid. Toughened grades for impact and vibration.
- 2K polyurethane: more flexible and impact-resistant; sandwich panels, doors and windows, vehicle bodies.
- 2K SE / hybrid polymers: isocyanate-free, elastic, fast and uniform cure even in thick sections.
Mix ratio and pot life
Mix ratios are given by volume or weight (1:1, 2:1, 10:1…); deviating from them ruins cure and strength. Pot life shortens with temperature and batch size because the reaction is exothermic. Static-mixer cartridges give reliable mixing; production lines use meter-mix equipment.
1K vs 2K
1K adhesives cure from the surface inwards with moisture; 2K adhesives cure uniformly and suit thick layers and closed joints, but require mixing discipline.
See our reactive one- and two-component systems or contact us to choose the right cure speed for your process.
