British Paints H2O Enamel Gloss is a water-based enamel, suitable for use inside and outside on doors, windows and timber trim surfaces. H2O Enamel is a great alternative to traditional oil-based enamels, with all the time saving and convenient benefits of water-based paint. Disclaimer: Colours and images shown may not represent the true colour. Colour reproduction can vary when viewing colours on your screen. For accuracy, always obtain a colour card or sample pot before deciding on your colour choice.