Silicone mold for multiple use: one-piece seamless mold to cast concrete coaster.
This reusable mold is intended to make small concrete round coaster shown on the photo.
With this mould you can make coasters with diameter of app. 9.5 cm (3.5") and app 1 cm (0.4'') thick. Weight of resulting product is about 100 g (3.5 oz).