FEATURES: All-temperature gunability — consistency is virtually unchanged from -37°C to 71°C permitting the sealant to be applied in any season to dry, frost- free surfaces. Neutral cure — suitable for use on masonry substrates and will not react with or corrode most building components. Primerless adhesion — upon curing will form a strong bond to mist common building components without the use ofa primer. Long-life reliability — cured sealant stays elastormeric from -54°C to 149°C without hardening, cracking or becoming brittle under normal weather conditions. Medium Modulus — with extension/compression capability up to +30% of original joint width. APPLICATIONS: DOW CORNING® 789 silicone weatherproofing sealantis designed for sealing expansion and control joints, precast concrete panel joints, non structural curtainwall mullion jomts, stress cracks and joints in parapel walls.