X-21 Flat Base, acrylic paint, 23 ml bottle

X-21 Flat Base is an X-Acrylic paint for plastic model building, supplied in a 23 ml bottle for controlled use at the bench. The liquid format suits precise mixing and finishing work where a flatter paint surface is needed on detailed model sections. This formula belongs to the Tamiya X-Acrylic range and is identified as X-21 Flat Base in the product data. The safety documentation describes it as a liquid paint mixture with binders, pigments and solvents, and lists a density of 1.0 g/ml at 23 °C. The same document states a flash point of 31 to 33 °C and classifies the contents as flammable, so handling belongs in a well-ventilated workspace. For model makers planning a paint setup, the 23 ml volume is easy to portion for repeated mixing sessions instead of opening a larger container. On the workbench, X-21 Flat Base fits into finishing routines for body panels, cockpit parts, accessories and other painted model areas where surface appearance matters. The bottle size is easy to keep alongside brushes, palettes and mixing tools, and the dedicated flat-base format supports consistent preparation across multiple stages of a build. This paint is recommended for ages 14 years and up.