When we needed to re-caulk our bathroom, we went straight over to the experts at Green Depot and bought the Titebond Tub & Tile caulk. This caulk provides a flexible and water-tight seal around tubs, sinks and showers, and has low VOCs.
The caulk also cleans up with water while wet, dries quickly, and can be painted within 4 hours of application. It also provides a mold and mildew-resistant seal when fully cured.
Titebond's Kitchen & Bath sealant is also low VOC and cleans up easily with water. Its 100% silicone formula is specifically designed to permanently seal high-moisture areas found in kitchens and baths. It is ideal for sealing around tubs, showers, sink and counter tops and offers excellent adhesion to many common materials including vinyl, ceramic tile, aluminum, glass and painted surfaces.
Both available through Green Depot.