Every day customers come to our store requesting transparent sealants to protect this stone from mushroom or green/black wool that forms in it due to its high porosity and because it absorbs a large amount of moisture. When we use sealants, what happens is that they form a plastic coating on top of the stone, sealing its pore, blocking contact with moisture, and generating a counterproductive result: we lose its non-slip capacity. In addition, by placing a plastic coating, the surface heats up; in both cases, we lose the main attributes of the stone.

We recommend first preparing the surface by washing it with Sherwin Williams Builders Base Mildew Inhibitor Remover to remove and inhibit any fungal spores. We let it dry completely. Now we can apply Sherwin Williams Water Based Repellent or Thompson's WaterSeal. These two products do not form any layer and their function is to repel water. They will maintain a natural and aesthetic appearance of the material without compromising its attributes and rather taking advantage of them. 

For any questions regarding maintenance or other issues, it is a pleasure to assist you in our store located in Bahía Ballena de Osa, in front of the National Bank next to the Marino Ballena Restaurant.