IS 3400 is the master test method standard for vulcanized rubber in India. It is a multi-part standard with 20+ parts covering tensile, hardness, tear, compression set, ageing, abrasion, and other properties. Referenced by all rubber product specifications.
Multi-part standard covering test methods for vulcanized and thermoplastic rubbers including tensile strength, hardness, compression set, ageing, and abrasion resistance.
Practical Notes
! Part 1 (tensile) and Part 2 (hardness) are the most commonly requested tests for rubber products on construction sites.
! Shore A hardness is the standard for flexible rubber. Shore D for hard rubber and plastics.
! Compression set test is critical for gaskets and seals — high compression set means the rubber won't spring back after load removal.
! Always condition rubber samples at 23±2°C for minimum 3 hours before testing.