Having good chemistry - in this case the right mix of market, person and product - is behind the success of Energy Shield, Inc., a Pontiac spray polyurethane foam contractor that has been in business for over 30 years. Introduced into the U.S. market in the late 1960s, energy-efficient spray foam gained momentum in the 1970s – a decade marked by the Arab Oil Embargo, the emergence of the energy crisis, and the televised fireside chats of a sweater-clad Jimmy Carter encouraging the nation to dial down the heat.