Laboratory Heat Sealer is designed for development work in determining the sealing properties and characteristics of plastic and laminated materials. The heat sealer is electrically heated and temperature controlled with adjustable sealing pressure, controlled by a timer. Sealing bars are covered with Teflon for non-stick to use easy. Sealing is initiated by two push buttons powering a pneumatic cylinder to lower the upper sealing bar to seal. The timer will determine the length of time that the sealing bars in contact and the sealing pressure is adjustable by a regulator. It is used to precisely control the parameters essential in determining the heat seal threshold. It is especially suited for flexible packaging materials and features accurate control of temperature, pressure and dwell time of a standard surface area sealing jaw.