Heat seal & packaging tooling components - top & bottom - must withstand the temperature, pressure and dwell requirements for these applications. We are manufacturer of Heat Seal Tooling which is user friendly (easy for automation or an operator to load and unload parts) and durable. Platens or anvils are necessary to secure/hold parts, support the sealing area, and locate/position parts for repeatability. United Silicone will often add features to a tooling set to make set-up easier and provide consistent, quality parts more quickly on changeover - jack screws, alignment pins, part sensors, etc.