It should etch but it will leave residue.  Pic would help

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On Jul 11, 2017, at 2:04 PM, <joyce@thepersonaltouchsolution.com> <joyce@thepersonaltouchsolution.com> wrote:

Hi Guys, We just had a close friend of a customer call in a panic because he used CLR, a strong acid on a "granite" sink and it left "etching".  We are going to go look at it.  We don't know whether it reacted with a seal or whether the matrix is made up of  calcium based stone and resins and it truly etched it.  Does anyone have any experience with this?   President Mobile: 309.251.3192 Email: joyce@thepersonaltouchsolution.com Web: www.thepersonaltouchsolution.com

 
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