A rapid tack free, ready-to-use silicone conformal coating, Master Sil 773 provides excellent protection to electronic circuitry in high humidity environments as well as upon exposure to shock and vibration. It cures quickly at ambient temperatures to a highly flexible, transparent, low hardness silicone coating. The coating maintains its low modulus over the remarkably wide temperature range of -65°C to in excess of +200°C. Master Bond, 154 Hobart St., Hackensack, N. J. 07601, (201) 343-8983, www.masterbond.com