Effortless Sealing Performance: IdealSeal's Envelope Liquid Moistener ensures smooth, consistent sealing for bulk mailings, perfect for high-volume corporate and small business use. Ready to Use: No mixing required! This Liquid Sealer works seamlessly with all DM series systems and other postage meters, eliminating messy residues. Cost-Effective Bulk Supply: Each gallon (128 oz) offers long-lasting use, reducing the frequency of reorders and enhancing your mailing operation efficiency. Safe & Reliable: Specially formulated to prevent clogging and machine wear and enhance the longevity of your shipping equipment by preventing mineral and residue accumulation. Universal Compatibility: Designed to perform excellently with brand-name machinery, making it a versatile choice for any business.