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Draft-Block is a 1-component expanding polyurethane foam sealant, dispensing as a bead from an aerosol container to fill voids and cavities on flat and irregular surfaces. Easy to apply spray foam sealant and expands three times. When foam is cured it is odorless, non-corrosive and inert, containing no urea formaldehyde. RectorSeal Dtraft-Block spray foam; Excellent filler which bonds and insulates, fill voids, cracks, crevices and small cavities on flat or irregular surfaces, Reduces sound transmission, and is dielectric. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.
From the Manufacturer
Draft Block is a one component expanding polyurethane foam sealant that expands to three times its original dispensed volume. It is designed to reduce heating and cooling costs by filling and insulating openings. Draft Block is an effective acoustical sealant and reduces sound transmission. Its dielectric formula will not transmit an electric current and adheres readily to wood, glass, metal, tile, concrete and most plastics. 2-Ounce Aerosol (12-Piece).
Bruce
Reviewed in the United States on June 3, 2015
It worked OK, but it was not as "fluffy" as the brand I usually get. I'm used to the stuff rapidly expanding, but this product seemed to sort of lie there and take it's time expanding. It did the job eventually, but I'll go back to my old brand next time.
Jason Clark Webber
Reviewed in the United States on October 9, 2015
Pressed the trigger. It expanded. Tons. Does the trick and a surprising amount is in the can. A bit pricey.
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