buffer (bÅ­f'Ér) Chemistry A substance that prevents change in the acidity of a solution when an acid or base is added to the solution or when the solution is diluted.
These Ford Racing Performance Head Gaskets are specifically designed for use with cast iron or aluminum cylinder heads on a Ford 289, 302, 5.0L, or 351 Windsor V8 engine.
Although there are a wide variety of other materials now used to make gaskets, the EPA still allows asbestos to be used in gaskets and other automotive applications, such as brake linings, since the fibers are usually tightly bound in the material.