Below is a list of Teflon Gaskets manufacturers from Haverhill, Massachusetts. Polytetrafluoroethylene (PTFE), which goes by its more common brand name, Teflon, is a non-stick substance that can be used to make gaskets. Teflon gaskets provide a wear-resistant seal for gaps between machine parts on applications in various industries. Teflon is an inert substance and can withstand heavy chemical flow where other materials cannot, providing a safe, highly resilient coating and preventing chemicals from leaking and contaminating anything.