Ready Mixed Fillers

The answer is simply no. Instead always use a specialist sealant to seal around baths, showers, and wet areas. Ideally this will be a silicone or modified silicone sealant that contains a fungicide. Unlike caulk using a good silicone will provide flexible joints that prevent long term water damage from leaks and mold growth.

Generally most powder fillers require a ratio of about two parts filler to one part water, but you should always check the manufactureres instructions before you start mixing. Mix your filler in small batches by gradually adding water, and blend until you have a nice creamy consistency which allows you to build peaks without collapsing.

Decorators caulk is a fast drying acrylic filler that's designed for quickly filling small gaps between things like skirting boards and plaster walls. It offers low levels of flexibility and can be painted over with most types of paint.