Loctite

Loctite began in Connecticut in 1953, when Dr. Vernon Krieble developed the first anaerobic adhesive in a college laboratory. The material cured without air, which made it useful for locking, sealing, and fastening metal parts. In 1956, entrepreneur Paul Bullock bought the rights to the invention and founded American Sealants Company. The first Loctite product was officially introduced on July 26, 1956. Its practical value was tied to industry: threaded parts, bearings, and metal assemblies needed reliable bonding under pressure, vibration, and daily mechanical load. In 1963, American Sealants Company became Loctite Corporation, and the product name became the company’s main corporate identity. During the 1960s and 1970s, Loctite expanded its line beyond the original anaerobic adhesive. The company introduced threadlockers, bearing retainers, and related products for automotive, aerospace, and industrial production. In the 1980s, the brand moved further into global markets by opening branches in Europe, Asia, and Latin America. Its catalog expanded to include instant adhesives, epoxy resins, and silicone sealants, giving the company a broader base beyond its early metalworking niche.