Waterproof Potting Compound for Industrial Foot Switches? Selection of SIPC 1835 A/B Silicone

ELAPLUS SIPC 1835 A/B two-component silicone potting compound is recommended for evaluation when internal electronic zones of industrial foot switches require waterproofing, moisture proofing and electrical insulation protection. It features elastic properties after cure, low shrinkage and protection for electronic devices, making it a candidate material for permitted potting zones inside foot switches. For assemblies with mechanical contacts, return springs and movable pedals, the stationary electronic cavity must be separated from moving mechanisms. The entire switch shall not be fully filled with adhesive. Industrial foot switches are widely used in automation equipment, machining machinery, test jigs and industrial control systems. Operators control equipment start-stop, signal input and other functions via foot actuation, so the switch must maintain stable electrical connections and mechanical performance under repeated cycling. Some foot switches use mechanical microswitches, while others adopt magnetic sensing, Hall effect or other non-contact detection structures. Adhesive application positions differ significantly between designs, and waterproof potting solutions are not universally interchangeable. 1. Why Do Industrial Foot Switches Require Potting Protection? Foot switches are generally mounted under machinery or near workstations, where they may be exposed to dust, water droplets, cleaning fluids and mechanical vibration. For units with internal PCBs, sensors or electronic signal processing modules, properly designed potting provides insulation and environmental protection for designated electronic areas. Nevertheless, waterproofing of foot switches does not rely entirely on internal potting. Pedal shafts, housing seams, cable outlets and other moving interfaces can also serve as ingress paths. Potting only the PCB while neglecting sealing at the housing and cable entry points will still allow moisture to penetrate other areas. Conversely, overfilling adhesive into moving mechanical zones to achieve full coverage may impair pedal return and contact operation. Therefore, material selection for industrial foot switches must treat electronic protection, housing sealing and mechanical movement separately….