Impregum Penta Medium Body Refill Polyether Impression Material #31642Benefits Hydrophilic before, during and after the set for unsurpassed accuracy, even when moisture is present. Thixotropic: flows smoothly under pressure. Snap setting characteristic provides greater assurance of achieving precise fitting restorations without distortion. Automatic mixing and dispensing with the Pentamix System for completely homogeneous mix at the push of a button. Contains: 2x300ml base, 2x 60ml catalyst.