I re-formulated my liquid conditioner the other day to compensate for the very dry winter conditions we've been experiencing, and, as usual, shared it with my best friend. She wrote to me raving about the consistency - it's thinner but still feels substantive. Thinner? What? It's the same consistency I use all the time...or is it? I checked the little bit I have left in another bottle and it felt the same to me.
And then I got it! I don't usually include cetrimonium chloride in my best friend's version as her hair has generally been shorter and not very tangly. I need all the detangling I can get, so I always use 2% cetac in my conditioners, and 2% is just enough to thin out the 7% BTMS and 3% cetyl alcohol version of the conditioner! (Why does this happen? I've done tons of research and still don't have the answer!)
So yes, the 7% conditioner will be thick - feel free to reduce the BTMS to 4% or so (and the cetyl to 2% in that case) or include cetrimonium chloride at 2% to thin out the conditioner!