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What causes some tires to smell like ammonia when the valve core is removed?

April 26, 2017ammonia causes core removed smell tires valve

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What causes some tires to smell like ammonia when the valve core is removed?

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This smell is usually an indication that the tire contains ‘fix-a-flat’ or similar injectable sealant. Since many of these products are flammable, a spark generated within the vicinity of the tire can ignite the gas and cause an explosion. To prevent serious personal injury, it is vital that the gas be purged from the tire whenever an ammonia smell is detected. This can be accomplished by inflating and deflating the tire several times before unseating the beads. If the tire is going to be returned to service, clean the inside of the tire thoroughly, making sure all of the sealant has been removed.