Founded in 1937, RectorSeal started as a manufacturer of specialty chemical sealants. One of our first products, RectorSeal Number 5, became a staple of the plumbing industry, becoming the most common thread sealant throughout the U.S. Since these beginnings, we have continued to grow by expanding our offering of chemical and mechanical products to support the tradesman in their work. Our growth has centered around a simple mission: To provide innovative solutions to the professional trades. We want to help professionals in the heating & cooling, plumbing, electrical and construction industries perform their work faster and with greater reliability.