Roberson : Siccative

Roberson Cobalt Siccative Is A Drying Agent For Oil And Alkyd Colours, Designed To Accelerate The Formation Of A Surface Film By Acting On The Oil's Oxidation Process. It Should Be Used With Great Care – Only 1-3% By Volume – Added Drop By Drop To The Paint Before Mixing, As Excessive Use Can Lead To Wrinkling Or Cracking Of The Paint Film.