with this stuff all you usually have to do is mix it in your hands like play doh. until all the colors are together and grey.Its also not a liquid either if you wondering. So its not like usual epoxy.
Thanks but i dont get how if you have a check valve how air even gets into the chamber of the pump to be pushed into the gun or tire valve. heres what i think if you push the handle down once the air will go out but how does air get back into the pump?