EP21TDC-4 Two-Component, Flexible Epoxy

Feb. 14, 2007

Highly flexible, two-part epoxy EP21TDC-4 has been developed for bonding, sealing, and coating applications. EP21TDC-4 is formulated to cure at ambient temperatures or more quickly at elevated temperatures. It has a high peel strength of >30 pli and an elongation of over 300%. Bonds have excellent resistance to vibration, impact, and shock.


EP21TDC-4 is 100% reactive and no solvents or diluents are emitted during cure. The bond strength between similar and dissimilar substrates is exceptional. It is particularly recommended for adhesion to natural rubber, neoprene, nitride, and SBR rubber compounds without time-consuming surface preparation procedures.


This system has a 1 to 4 mix ratio by weight and is available in premeasured kits and applicators. EP21TDC-4 can be used over the wide temperature range of -100 to +250°F. It has superior resistance to fuels, water, oils, and many chemicals. It can even be cured underwater.

  • High peel strength
  • Outstanding adhesion to rubbers
  • Excellent thermal cycling resistance
  • Withstands 1,000 hours 85°C/85% RH