CRC Soft Seals firm, waxy film is highly resistant to humidity and salt spray, never become brittle and will not craze. It seal out moisture and corrosive contaminants by forming a dry, transparent, amber film which is highly resistant to humidity, salt water and salt spray and is used for air conditioning equipment, cable end sealer, dies, moulds, jigs, to protect equipment, tooling, in-transit and stored equipment, airport and aircraft maintenance.