PPG Industries manufactures Rapid Seal Sealants and Semco Packaging Systems. 

Rapid Seal Sealants exhibit unsurpassed resistance to organic solvents.  These two-component polysulfide materials are designed for fuel tank and other chemical storage systems. 

Semco plastic packaging facilitates reliable dispensing of a wide variety of materials including odd ratio, two component systems.  The Semkit package is a complete, multi-component plastic cartridge assembly which stores, mixes, and applies adhesives, sealants, encapsulants, and other materials assuring accurate proportioning of the materials.  It eliminates labor-intensive tasks of measuring and handling materials while minimizing skin contact.  There are two types of Semkits, injection and barrier.