Both the substrates, to be bonded, are to be made free from impurities from dust, oil, grease etc. & made dry. The leather surface is to be buffed properly. The synthetic surface should be cleared by acetone or similar solvent. For complete evaporation of solvent, the synthetic surface is kept in the poen atmosphere for minimum 5 mins. A thin layer of adhesive is to be applied on both the surfaces to be bonded. Both surfaces are to be kept for solvent evaporation for 10 minutes. Second coat on porous surface will produce better result.

The two substrates are then bonded by "stuck-on-process" after heat activation (at 70 - 75° C for leather & PV and at 50° C approx. for TPR/EVA/PU).

Bonding is to be done immediately after heat activation under uniform pressure when the substrate are hot.