A high-quality, non-sag, multi-purpose sealant that cures on exposure to atmospheric humidity to form a durable elastomer. It provides permanent elastic seals with high adhesive strength. It is widely used in the automotive, transportation, marine, and general industrial manufacturing sectors for bonding and sealing a variety of substrates including metals, wood, ceramics, and plastics. It is non-corrosive, low-odor, resistant to aging, and can be sanded and painted over once cured.