Our menda monomer pump has a non return valve in it so that liquid cant get back into the container.

Beware of using anything that is not purpose made for this use.

This Menda pump is fantastic for Acrylic liquid.

Our menda pump also has a little mushroom piece in the top, this will stop the acrylic liquid flowing back in.

Acrylic Liquid CANNOT flow back into this menda pump, so contamination will NOT occur!

It will pump the liquid to the top with just one little press.

The mushroom device that is fitted over the top will also stop splattering.

Beware: of the cheaper brands that do not have a mushroom top.

Your monomer will flow back down the pump and contaiminate the entire contents. Rendering your monomer useless!!!!

This pump will last you many many years.