Vallejo 70400 Model Colour Plastic Putty 17ml #400 – Hobby Tools & Supplies

A modelling paste which dries to a white, totally opaque, stone hard finish. It is used principally for rebuilding or restructuring models and miniatures, for textures and high reliefs. For extra high relief the paste should be applied in layers, allowing each to dry before applying the next. If a more flexible paste is desired, mix with Gel Medium (5/5).
Characteristics: An acrylic paste of high density, containing marble dust.
Application: Straight from the tube, or with a spatula.