The Kester 186 is a Type RMA rosin flux pen engineered for professional electronics assembly and rework across leaded and lead free soldering applications. This 10mL pen applicator delivers reliable flux coverage for SMT work, conventional PCB assembly, and through hole soldering on production lines and in field repair scenarios. The formulation uses minimal ionic activators and produces non corrosive, non conductive residue with high thermal stability, allowing technicians to leave flux residue on finished assemblies in many applications without cleaning. Choose the 186 for consistent, professional results when precision and reliability matter in your soldering workflow.
