Amazing Stain Protection using HMK S34 Impregnating Stone Sealer

May 12, 2015 Off By Torin Dixon

How well does HMK S34 Really work?

We started with one of the most porous natural stones commonly used for floors and countertops – Travertine.

As you may know, Travertine is a calcium based stone that is formed in the presence of hot springs. This creates the distinctive pores that most often are filled with a colored cement grout. Both the stone and the grout are very porous and left unprotected, can stain easily.

I took this sample tile and sealed it with one coat of HMK S34 Silicone Impregnator. Then I deliberately tried staining it, first with strong coffee. I let the coffee dry/bake in the sun for 12 hours. I then rinsed it off with a garden hose, and the dried coffee came off without any stain.


IMG_1988Not to be dissuaded, I next turned to a common enemy of natural stone, Red Wine!

***Caution: ┬áDon’t Try This at Home*** (without using HMK S34)



IMG_2009This time I let the wine dry for two days before I tried cleaning it. I thought for sure, there would be staining, if not in the cement grout fill, then certainly in the tiny little pinhole pores not filled by the cement grout, and there was, but with just a little HMK R55 Intensive Cleaner, allowing it to soak in and activate, within a few minutes the tile was clean and like new.

Cleaning Wine Stain on Travertine Tile


R55 Intensive Cleaner (R155) was used in a solution 1-Part to 5-Parts warm water. Allowing the solution to soak/dwell on the surface for 15 minutes. Scrub with a sponge or wash cloth and rinse.



After 15 minutes of activating, simply scrub and rinse. All the wine in the pinholes was gone.

Used as a complete system, S34 Impregnator, and R55 Intensive Cleaner protect and clean all Natural Stone against common spills and stains.

Even after using and recommending HMK S34 Impregnator for more than 30 years, I am still surprised and amazed at how well it protects natural stone!