Wet and high-humidity conveyor applications require more than a standard belt size and EP rating. This guide shows B2B buyers how to define moisture exposure, evaluate EP carcass construction, cover protection, adhesion, edges, splices, contaminants, testing, and supplier documentation. It also explains how to compare factory quotations on an equal technical basis and what operating, specification, inspection, and commercial information to include in an RFQ for custom wet-service conveyor belts.