Caulking a bathroom involves applying a sealant to seal joints and gaps, preventing moisture penetration and enhancing aesthetic appeal. Essential tools include caulk guns and backer rod, while various caulk types (silicone, acrylic, latex, polyurethane) offer distinct properties for specific applications. Bathtubs, showers, sinks, toilets, mirrors, tiles, and beading all benefit from caulking. To ensure a professional finish, use tooling and smoothing techniques, maintain caulk regularly, and follow safety precautions, such as proper ventilation and using safety gear to avoid exposure to fumes.