Experienced in lamp seal, customized foil seal, including custom foil seals made to order using a large range of metals such as Etched Molybdenum, Platinum Clad Moly and Tantalum. Since 1939, H.Cross Company has been, customized foil seal, lamp seals supplying custom to some of the largest foil companies in the seal world as well as the smaller, more specialized manufacturers and university custom foil seals labs. Key content. seal custom foil seals plastic machining labels machined parts stickers items.