Mayhems Aurora Concentrate Tharsis Red 250ml (Aurora Concentrate Tharsis Red) Can be used with all of Mayhems Dyes to make your very own colors Blended with Non-Toxic Corrosion & Scale Inhibitors for protection of *Copper, Brass, Steel, Nickel and Aluminium Proven to ASTM D3306 and BS6580 standards -35c freezing point Can be stored for up to 3 years&#xFEFF; (if stored in a cool dry environment)