Smartech supplies the thermofoil door Industry with Steinbach silicone and natural rubber membranes. Smartech says Steinbach membranes are valued for their durability and availability. Smartech stocks four durometers of silicone plus natural rubber at its office in Charlotte, NC. Textured or smooth surfaces are available, in a variety of thicknesses. (704) 362-1922, SmartechOnline.com