Home - AJ Weller, COMPOSITE TECHNOLOGYmeans reduced downtime Weller’s Composite Technology means reduced downtime, prolonged service life, lower operational… Learn More QUALITY PERFORMANCEwith high-grade materials Performance is the truest test of our products and applications. Weller uses only the highest-grade materials… Learn More BENEFITSof diverse product lines Weller’s Composite Technology coupled with new product development has had a wide range of industrial benefits… Learn .