Distilled water is not the same as De-ionized.
I use De-ionized water with Mayhems XT-1 150ml Clear Coolant or coloured - make's up to 3 litre's and
Benefits-
More efficient heat transfer then vegetable extract
Easier to pump, especially at low temperatures.
Less volume for the same freeze protection.
Has been tested and classified as Non-Toxic by an EPA certified laboratory.
Additive has very little effect on heat transfer or antifreeze performance.
Readily biodegradable (90% over ten days) and will not remain in the environment or bio-accumulate.
Synergistic corrosion inhibitors to protect metals commonly found in such systems that contain mild & stainless steel, aluminium, copper, brass and cast iron and plated products.
Contains scale and biological inhibitors to help prevent fouling – thus promoting long operational life and high thermal efficiency.
Exhibits super-cooling characteristics and mixtures containing in excess of 50% by volume and they do not freeze solid.
Safe to use with Mayhems Dyes
Child Safty Cap fitted as standard
http://www.overclockers.co.uk/showproduct.php?prodid=WC-084-MH&groupid=962&catid=1531&subcat=2416