Tire Lyna promises to keep up your air By Stephen Petit: It's a bold statement to say that one product can reduce tire-operating costs. But Tire Lyna sealing compound isn't pulled out of thin air. "Sealants typically haven't worked in commercial tires because of the heat and pressure they're exposed to," says Dr. Ken Pinder, Lyna's Chief Engineer. "They dry up, clog valve stems or deteriorate. Our product is a gel that maintains its properties under optimum operating conditions. It's non-toxic and organic; you can take a hose before the tire goes into recap and wash it out." Tire Lyna also has a sealant that works against bead leaks and small punctures, and it won't have an effect on your tire or retreaders warranties. What it won't do is balance your tires or absolve you of the need to check pressures or conduct regular maintenance.