KnightClean Pastekleen SB 141 is a non-halogenated, biodegradable organic solvent blend designed for effective removal of all types of SMT solder pastes and flux residues, including RA, RMA, low-solids (no-clean), and water-soluble types. It also removes leaded and lead-free solder pastes, fingerprints, and light oils from printed wiring boards (PWBs), stencils, and misprints. Free from surfactants and easily rinsed, it is suitable for use in immersion, ultrasonic, and manual cleaning processes. Its dual-function molecular structure—comprising hydroxyl (OH) groups for dissolving water-soluble residues and hydrocarbon (CH) groups for removing oil-based contaminants—ensures efficient and comprehensive cleaning performance.