DIVERSITECH DiversiGum Sealing Compound is a non-hardening, non-toxic, and easy-to-use sealing material ideal for HVAC and refrigeration applications. Perfect for plugging openings in foundations or around tubing entries, it creates a reliable barrier against dust, moisture, drafts, and noise. This non-corrosive, non-staining compound remains pliable for long-lasting protection in residential and commercial settings.