Originally Posted by
Desertnate
I`ve shied away from applying an LSP to gaskets and rubber trim long ago after having some carnauba seriously stain the rubber and it was nearly impossible to get off.
With coatings, I`ve seen them stiffen and harden the application swatches and buffing rags after they dry. I can`t imagine that`s a good thing for something like a rubber gasket/seal which needs to stay supple and flexible to do it`s job. If the rubber does remain flexible the coating won`t and I`d imagine it would shatter and flake off.
For external gaskets/seals I`ll use a dedicated trim protectant. On my own personal vehicles I`ll occasionally use gummi pfledge on the interior gaskets and seals to keep them soft, pliable, and prevent squeaking.
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