The only impregnating sealer that I am aware of that promotes
anti-slip is Miracle Sealants 511 Porous Plus.

Quoting Stephen Webb <stephen@newlifemarblerestoration.com>:

> Greetings all,
> Custys Limestone pool patio is to slippery. was honed before someone
>  acid washed it trying to rough it up. Thought about hitting it with
>  antique brushes to restore the finish leaving some texture.
> Comments/suggestions appreciated. Any good impregnators to reduce
> slip?.
> Stephen Webb
> 280-7387
> www.newlifemarblerestoration.com
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