Composimold bubble buster 6fl oz 177ml composimold cmbb06 p this composimold bubble buster has been designed to reduce bubble formation when making a mould the pva mixture works by reducing the surface tension so bubbles rise up and away from the mould surface easy to use just spray your original part with bubble buster after applying a mould release before pouring composimold over to make your mould p composimold cmbb06 bubble buster 6fl oz 177ml