Dekoron Unitherm, a Marmon Holdings Inc. company, is the inventor of pre-insulated and heat traced tubing for heavy industry. ... We have been producing pre-insulated and heat traced tubing bundle since 1962. With over 50 years experience and in excess of 100 million feet of product installed, Dekoron Unitherm is a world leader in the design and manufacture of pre-insulated and heat traced tubing and small bore pipe. Our products have been installed on every continent and in some of the harshest environments known to man. read more