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.

Today, we have developed a robust line of chemical, mechanical and firestopping products. These products are distributed through an extensive wholesale distribution network serving the plumbing, industrial, HVAC-Refrigeration, construction, electrical, and hardware market places. Our primary products include thread sealants, firestopping sealants, plastic pipe cements, anti-seize compounds, fluxes, lubricants, chemical cleaners, duct sealants, leak locators, and other specialized products. Many of these products have built a strong following among contractors due to their differentiated performance and from being the first to tackle challenges faced by the professional trade.

RectorSeal is a member of CSW Industrials. (CSWI: NASDAQ), a publicly traded, diversified industrial company.

The RectorSeal Story

Acquisitions Between 1990 & 2020

Our History

The Beginnings of RectorSeal

The company was established in 1937 in Houston, TX as a division of Rector Well Corporation of Ft. Worth, TX to produce thread sealants (RectorSeal No. 1) for oil field threaded fittings.

Entry into the Trades

RectorSeal No. 5, invented in the 1950’s by RectorSeal, established the company in the plumbing segment, quickly becoming the thread sealant of choice for plumbers. The growth captured the interest of the Capital Southwest Corporation, a publicly held company headquartered in Dallas, TX and let to Capital Southwest acquiring RectorSeal in 1969.

Development of Firestop

In 1991, RectorSeal acquired Metacaulk, a leader in the firestopping industry, accelerating RectorSeal’s strategy to deliver a portfolio of high quality and scalable building safety solutions. In 1995, an on-site fire test laboratory was built for the purpose of conducting UL witnessed burns for through-penetration and construction joint assemblies. The RectorSeal fire lab has been designated by UL for fire testing to UL 1479 & UL 2079.

Expansion into HVAC & Electrical

During early 1990s, RectorSeal introduced Acid Away, the patented AC compressor burnout acid neutralizer. Through the acquisition of Steward Hall, RectorSeal expanded its line of HVAC chemical products, including condenser and evaporator coil cleaners, to the HVAC portfolio. RectorSeal expanded its plumbing footprint while the acquisition of Nokorode and entered electrical supplies through the acquisition of Wire Snagger in the early 2000s.

Growth in Domestic Manufacturing
Due to strong growth, RectorSeal moved to its current location in Houston in 1998, resulting in an integrated chemical lab, production facility and shipping location. Moreover, RectorSeal expanded its mechanical and plastic manufacturing by purchasing Airtec and its manufacturing facility, located in Fall River, MA, in 2011.

Doubling Down on the Trades

Over the years, with both chemical and mechanical product additions including Safe-T-Switch, Aquaguard, EZ Trap, Clean Check, G-O-N, Kickstart, Novent, SureSeal, Fortress, Slimduct, Wire Grabber, and Big Foot, RectorSeal became a leading manufacturer across a range of firestopping, plumbing, HVAC and electrical products. RectorSeal has innovated and driven solutions for condensate management, lineset protection, solvent cement application, HVAC mounting & installation, pipe joining, DWV solutions, wire pulling, and firestopping.

Since 2015, RectorSeal and its parent company, CSW Industrials, have been publicly traded on Nasdaq (NASDAQ: CSWI). More information on CSW Industrials can be found at www.cswindustrials.com