The TwinPack is a clear film sachet, with the resin and hardener separated by a removable clip and rail divider.
To mix the adhesive system, the divider is removed and the rail used to push the two parts together within the pack. The materials are mixed until they appear uniform, about 1 to 2 minutes, then the adhesive dispensed from the pack by cutting off one corner.

TwinPacks manufactured by Resintech are occasionally packaged in multiples. For example a pack of five will have the part number "TP5".