Marble is a relatively soft natural stone. On the MOH (measure of hardness) scale, marble is only a 3 or 4 out of 10. Compared to granite, which is at least 7 out of 10, this is very soft for a surface material. When used for flooring or counters, marble does need to be sealed. The softness of marble can cause it to scratch easily. It can also absorb moisture and bacteria if it is not sealed. Sealant basically blocks the pores in marble so that moisture does not damage the surface. Resealing marble is simple, particularly if your marble is regularly cleaned and the resealing is done often.

Cleaning Your Marble

Before you can apply sealant to your marble, you need to clean the surface as well as possible. Dark marble can be a little hard to clean, if only because it is hard to see the dirt and stains.  You need to be thorough because you don't want to seal over small stains, dirt, and food on the surface. Marble sealant basically plugs the minuscule pores in the surface. These tiny pores are invisible, but they are definitely there.

Applying Sealant

The process of sealant application basically involves rubbing it on, letting it dry, and then rubbing it off. You have to repeat the steps two or three times to create a long-lasting and water-resistant seal. You can actually pour the sealant directly onto your marble and spread it around with a rag. You want to make sure you hit every square in so that the sealant has a chance to penetrate all of the pores. 

Once the surface is dry, you can use a dry rag to wipe down the entire surface. This will rub away any of the remaining sealant on the top of the surface. Then, you can apply the next coat. By doing it in layers, you can be sure that you hit every square inch and that all of the pores are filled.

There are no set rules for how often you need to reseal your marble. Since it is such a soft surface, it is probably something you should do at least once a year. This is definitely necessary when it comes to marble that is used on the kitchen countertop or bathroom floor. The constant fight against moisture and bacteria damage is much easier if your marble is sealed regularly.

For more information, contact your preferred marble sealing service. 

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