You also want to remove it from the tread of a brand new tire, for the same reason.

On 08/19/2016 03:42 PM, Scott Loveless wrote:
A mold release agent, typically silicon-based, is applied to the mold
used in the production of tires and tubes.  It's what gives them their
shiny appearance when new.  It's also slick.  When you repair a tube
with a patch, the purpose of sanding is to remove the mold release
agent so the patch, vulcanite glue and tube can bond properly.

On Fri, Aug 19, 2016 at 2:59 PM, Lungimsam <[email protected]> wrote:
What do you mean by "mold release".



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