Zeolum RG Synthetic zeolite Tosoh Moisture Scavengers >> Synthetic zeolyte PU - Prepolymers SEALANT Type A-3 Zeolum is a synthetic zeolite processing strong selective absorption properties. Zeolum is suitable for drying, purifying and separating a wider variety of feeds than any other adsorbent. Used as moisture scavenger for sealants. Synthetic zeolite. Used as moisture scavenger in urethane sealants. Provides drying and purifying.