Cleaning Darker Spots on White Granite

November 29, 2012 Off By Torin Dixon

Tom L. from Seattle called to ask:

How do I get dark spots off my Madura White Granite countertops? It has been installed for 12 years and I don’t think it was properly sealed.



As noted in the previous post, Small Grained Granite is much more porous than large grain/crystal granite. Being a white color makes this even more of an issue.

Over time, un-protected (or poor quality sealers) granite absorbs moisture, liquids, oils, etc. In white granite and marble these oils and soaps appear to darken the look of the white granite. In this case, 12 years can do a lot of damage. These darker spots occur mostly near the sink, around soap dispensers, and around eating areas.

HMK R55 Intensive Stone Cleaner

HMK R55 Intensive Cleaner can help to reduce the appearance of these darker spots. I suggest mixing Hot water 4 parts to 1 part R55. Use rubber gloves and a sponge to apply to the dark spots first. Scrub, and allow to Dwell on surface for 15 minutes. Do not allow to dry on surface. Apply more solution if needed. Wash remaining counters with R55 and completely rinse.

After 15 minutes, use a separate sponge to completely rinse off product. Rinse, and Rinse again. Allow to dry. Granite should appear ‘whiter’ with less dark spots. A repeat application may be needed.


Once countertop is completely clean and dry, sealing or impregnating can begin. For most stone, including granite and marble we suggest a professional grade Invisible Impregnator like HMK S34 Impregnator. This product penetrates deep into the pores of the stone providing protection that will last for years. For white and light colored granites, along with small grained granites of all colors, it is suggested to seal surface once per year.

For a detailed guide to sealing stone, please order our Free -Learn Sealing Techniques From The Pro’s Technical Article.

Tom ordered the Super Special Three Pack – R55 Intensive Cleaner, S34 Silicone Impregnator, and P24 Daily Cleaner and saved $7.10 by purchasing the Kit. Thanks Tom!