Mr. Clean Professional Grade Deep Cleaner

Mr. Clean Professional Grade Deep Cleaner is a heavy-duty chemical formulation, so you should avoid using it on delicate natural stones like marble or granite, which can etch. It is much better suited for glazed ceramic, porcelain tiles, and fiberglass surfaces found in commercial bathrooms.

Yes, the powerful chemical agents in this formula are designed to attack and dissolve deeply embedded mildew and grime, including black mold stains in grout lines. However, for severe mold infestations behind drywall, a dedicated fungicidal remediation product may be necessary.

Depending on the severity of the grime, this cleaner is often used as a diluted solution with water for general mopping and wiping. For deeply stained grout lines or heavy soap scum, you can apply the product full-strength directly onto the affected area.

Most standard Mr. Clean products are safe for septic systems when used according to the manufacturer's directions and properly diluted with water. However, you should always verify the specific safety data sheet (SDS) for the Professional Grade variant, as it contains stronger industrial solvents.