Quote Originally Posted by Eric in NC
Plumbers lead (bar solder) is know lead/tin mix (different forumulas but always stamped). Or you can buy pure tin bars from Midway (or other sources do a search).

As far as weights being pure lead or pure zinc etc. - not my experience at all but apparently others know better than me. NEVER found a wheel weight that was even CLOSE to pure lead (A pure lead bullet or weight will dent/deform when you drop it from waist height, you can easily dent it with a thumb nail, etc.).

But again, others know better I am sure.
I worded that incorrectly. When I spoke to the two local tires retailers, I was told that the weights are either lead, steel or zinc. I know that the lead weights are not 100% lead and already have tin in them to make them harder but I was told that the lead weights didn't have any zinc in them. Thanks for the source to look for tin.