Brown stains on tile grout that is above silicone, is probably a stain from something that was spilled. The stain will not be from the grout because it is located above the silicone.
To remove grout stains, you can create a paste of baking soda and water, apply it to the stained grout, scrub with a brush, and then rinse with water. Alternatively, you can use a commercial grout cleaner following the manufacturer's instructions. For tough stains, you may need to use bleach or hydrogen peroxide on the grout, but be cautious as these can be harsh chemicals.
Use grout as silicone will start harboring algae and be almost impossible to keep looking good.
To effectively seal grout and protect it from stains and moisture, you can use a grout sealer. Apply the sealer evenly over the grout lines using a brush or applicator. Allow it to dry completely before using the area. Reapply the sealer regularly as needed to maintain protection.
Depending on the severity of the grout stains, one economical way of keeping grout clean is with white vinegar diluted with water. If this doesn't do the job, you can purchase commercial tile and grout cleaner in any home improvement store. For the most severe grout stains, you can try chlorine bleach, or oxygenated powder, such as Oxyclean or even hydrogen peroxide.
The most effective method for removing stubborn grout stains using a grout dissolver is to apply the dissolver directly onto the stained grout lines, let it sit for the recommended amount of time, and then scrub the area with a stiff brush or scrubbing pad. Rinse the area thoroughly with water to remove any residue.
Some grout alternative options for tiling projects include epoxy grout, urethane grout, and silicone caulk. These alternatives offer different benefits such as increased durability, stain resistance, and flexibility.
Grout is one of the toughest surfaces to keep clean. Mold, mildew, food stains and general grime can all seep into grout making it look dirty and discolored. Common household cleaners can be an effective alternative to harsh chemical solutions when attempting to clean tile and grout. An equal mix of vinegar and water can be applied to grout stains to neutralize bacteria and kill mold. A thick paste made of baking soda and water can eliminate surface stains. Baking soda is abrasive, if the paste is rubbed across the grout it will naturally wear away dirt and grime.
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The best method for cleaning and maintaining grout for a fireplace is to regularly scrub the grout with a mixture of water and vinegar or a specialized grout cleaner. Use a brush or sponge to scrub the grout, then rinse with water and dry thoroughly. Applying a grout sealer can help protect the grout from stains and moisture.
if your grout line is less than 1/4" you use smooth grout, above that you use sanded grout.
All grout dries lighter when dry.but brown grout should not dry white. Check the date of; it might be passed its shelf life. look and see if you bought a light brown grout. You could cut the grout out with a grout rake but this would take ages
Grout is cement, sand & a liquid, the liquid starts the process of the cement & sant setting from a powder to a solid. Traditionally it was WATER that was used as the liquid newer grouts substitute Epoxy as the liquid, making the grout set harder stick together better and resist stains