Riptide motors are impervious to saltwater's corrosive effects, thanks to premium-grade marine alloys and aluminum upper arms. Metals undergo a rigid multi-step cleaning process before being anodized or coated with a special zinc dichromate armor plating. All components are then finished with a durable 5-mil TGIC polyester, powder coat paint. When it's all done, you're left with unequaled corrosion protection. Marine-grade urethane fully encapsulates Riptide control boards to protect the electronic circuitry.