Content about David Gerstein

October 11, 2013

Mahwah, N.J.-based Thermwell Products, makers of Frost King, has acquired PortaSeal of Morristown N.J., a manufacturer of weathersealing products, according to David Gerstein, president of Thermwell.

August 29, 2013

Mahwah, N.J.-based Frost King (Thermwell Products Co. Inc.) has acquired PortaSeal LLC of Morristown N.J. 

PortSeal makes weathersealing products, including Gara-Seal, a rigid vinyl strip with a flexible vinyl flange, which seals the top and sides of garage doors.

Both companies in the transaction are privately owned and operated: PortaSeal by Stanley Garbowy; and Thermwell by David and Mel Gerstein, twin sons of one of the two founding brothers.