If air vents are placed in a cabinet, they should be filtered so dust and gaseous pollutants do not enter. Air flow dilutes fumes produced by the stored materials. Gaskets provide airtight seals that help keep dust out of storage and display units. Rubber gaskets produce sulphur fumes that harm metal and photographic materials. Polyurethane foam gaskets create acidic gases and deteriorate to form messy dusts within cabinets.
Silicone is inert.
Ask for silicone gaskets from cabinet suppliers. Custom designed cabinet interiors may have drawers, trays, shelves or brackets inside. Make sure they work smoothly. Glides should be inert polyethylene, polypropylene or teflon. Placing a rigid acid-free support under flat pieces in storage trays or drawers makes them easier to move.