Our wall mold removal gel (90g box) contains emulsifiers, antibacterial agents, and surfactants. It can remove black mold from any surface, clean long-standing black stains, and make the home environment cleaner. Its usage is very simple: 1. Wipe the surface dry with a cloth. 2. Squeeze the gel evenly onto the surface. 3. Wait for 3 hours and rinse with clean water. The mold removal gel only takes 5 minutes to apply and, after waiting for 3 to 8 hours, can clean black mold from every corner of your home.