RectorSeal LLC is a leading manufacturer of chemical and specialty products for trade professionals. With a focus on high-quality products and innovative technologies, RectorSeal is backed by strong customer and technical support. We specialize in delivering top-tier brands for HVAC, plumbing, electrical, and firestopping applications, including Aspen Manufacturing, MARS, TRUaire®, Shoemaker®, Dust Free®, Safe-T-Switch®, Slimduct®, CoverGuard®, ClearDrain® and RSH®. Rigorously tested and proven to perform, RectorSeal products are designed to work—every time, without fail.