All our chain lubes are biodegradable wax/water emulsions together with additives to prevent component wear. We continually monitor the quality of the waxes we use to ensure we meet the highest standards and legislative compliance. Using newer generation fully refined waxes can result in natural separation of the emulsion if left standing for long periods of time. If you find that your bottle of Squirt Chain Lube has a visible separation layer in the bottom,  this is normal.  When shaken well before application, this does not affect the performance of the lube.  For optimal performance, follow the user application instructions on the bottle label or on the section in this FAQ.