Using Tenax Skudo Universal Plus is straightforward. You can apply it on surfaces that aren't completely dry, which is quite convenient. For best results, make sure the surface is clean. Just spread it evenly on the compact materials or stones, whether it's indoors or outdoors. It dries quickly, so you won't have to wait long. Since it's food-safe, you can use it on kitchen countertops with confidence. However, be careful when using it on marble. Avoid contact with acidic substances like wine, tomato, citrus, and coffee as they can cause etching. If you face etching problems, use an Etch Remover. To maintain the protection, you can re - apply the sealer periodically depending on the usage and wear of the surface.