Seals joints and seams in duct work for A/C, heating, and ventilation systems, Seams and patches reflective insulation materials, Sealing insulation and repairing in cooler/refrigeration applications, High-performance acrylic adhesive provides permanent air-tight seals in extreme weather conditions, Excellent operational temperature performance from -35F to 260F, Provides a durable bond in even the harshest weather conditions