Cetomacrogol Cream Breaks

What you need to prepare is an overoily Cetomacrogol cream. Such creams even exist up to 50% petroleum jelly.  

But the problem here is the incompatibility salicylic acid-cetomacrogol, which requires you to use another cream base eg hydrophilic anionic cream TMF. I would prepare 40 g hydrophilic anionic cream. We Blend the LCD under the hydrophilic anionic cream.  

In A mortar we make the urea and the salicylic acid powder finely and add to this powder mixture under well mix the petroleum jelly.  

This mixture we add slowly under hard blending to the hydrophilic anionic cream. This can be difficult because you add a fat phase to a cream whose external phase is water. Perhaps a final mixing using an Unguator improves the whole.