- Add more BTMS
- Add more oil or butter
- Remove cetrimonium chloride from the recipe
If you don't have cetearyl alcohol in your moisturizer add it at 50% of the cationic compound (BTMS, cetrimonium bromide or cetrimonium chloride) and reduce the water content by the same amount.
If you have 3% BTMS, add 1.5% cetearyl alcohol and remove 1.5% water - simple!
You can also use cetyl alcohol but I personally find that cetearyl alcohol works a lot better.
It stands to reason that if you want to make a moisturizer thinner because it is too thick then, you do the opposite:
- Reduce the amount of BTMS
- Use less vegetable oils and butters
- Add cetrimonium chloride
If you are mixing several cationic compounds look at the total amount of all of them not just at each individual one.