The word "polyurethane" is used throughout the description. Neither on the packaging, nor on the product, nor in the manual (there were no documents) is the word "polyurethane" used. Poly is used, but to me, poly is not polyurethane. Poly means many (Greek to me). Polyurethane, polystyrene, polyethylene, landfill, Polly wants a cracker. The fact that they used the word poly and not polystyrene casts doubt on the validity of the product. I bought one from Sears around 1987. It doesn't leak. I have purchased two more from Harbor Freight and none have lasted more than three years. Sears' is still going strong. It's been in my garage since I moved to Las Vegas in 1994. I hope this lasts at least three years. Bought based on reviews. My old one is greasy so I needed a clean one for housework.
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