🔧 Seal the Deal with RectorSeal! Resistant to water, alcohol, and mild acids. Non-toxic and asbestos-free for peace of mind. Easily hand-molded for any project. Perfect for HVAC/R, plumbing, and more! Paint immediately without bleed-through. Air & water tight 1 lb putty 25°F to 120°F Rectorseal 81880 Duct Seal Compound is a versatile, non-toxic putty designed for a variety of applications, providing a reliable air and water-tight seal. Ideal for professionals in HVAC/R, plumbing, and construction, this 1-pound compound is easy to use, hand-moldable, and compatible with various surfaces, ensuring a durable and effective solution for your sealing needs.