By John Florio, Ravi Ravichandran, David Switala and Bing Hsieh, King Industries, Inc. Source: wichientep - Regulatory restrictions on the use of tin catalysts create considerable difficulties for formulators of crosslinkable silane-terminated polymer systems. A tin-free organometallic catalyst can give good mechanical properties with similar cure times, and even cure one system where tin compounds are ineffective. Organosilane polymers are used in adhesives, sealants and coatings as either coupling ...