The Complete Guide to Formulating Hair Care Products at Home

A genuinely good conditioner is more than oil and water — it relies on a small set of purpose-built hair-care ingredients that a general lotion recipe simply doesn’t use. Here’s what each one contributes.

The foundation: a conditioning emulsifier

BTMS 85 is where a real conditioner formula starts. Unlike a general-purpose emulsifier, it’s built specifically to deliver conditioning benefit — detangling slip and softness — not just to hold the emulsion together. If you’ve tried making a conditioner with a standard lotion emulsifier and found it underwhelming, BTMS 85 is very likely the missing ingredient.

Boosting conditioning: cationic agents

Cetrimonium Chloride 30% is a cationic conditioning agent that specifically reduces static and improves both wet and dry combability — the practical, day-to-day difference between hair that tangles and hair that doesn’t.

Lightweight conditioning polymers

For leave-in products and lighter formulas, Polyquaternium-7 adds slip and softness without the heaviness a full conditioning emulsifier can bring. Guar Quat (Guar Hydroxypropyltrimonium Chloride) does a similar job from a natural-origin source, making it the preferred choice for sulfate-free, naturally-positioned shampoo formulas specifically.

Repair-focused treatments: protein

Hydrolysed Keratin works differently from the conditioning agents above — it delivers protein directly to the hair shaft, helping reinforce strands that are damaged or chemically treated. It’s the ingredient to reach for in a repair-positioned treatment or mask rather than an everyday conditioner.

A simple leave-in conditioner starting point

For a lightweight leave-in spray: a small percentage of Polyquaternium-7 or Guar Quat in a water base, with D-Panthenol added for its humectant and soothing properties, gives you detangling benefit without the weight of a full rinse-out conditioner base.

A simple rinse-out conditioner starting point

Build the emulsion on BTMS 85, boost slip with Cetrimonium Chloride, and consider a small percentage of Hydrolysed Keratin if you’re targeting damaged or over-processed hair specifically.

Don’t formulate ingredient by ingredient — test the whole system

Individual ingredients matter, but how they perform together — and how your specific water hardness, hair type, and rinse-out habits interact with the formula — only shows up in real testing. Start with a small batch, on real hair, before scaling up.

Ready to formulate?

If you’d rather start with a guided kit than sourcing each raw material separately, our Hair & Scalp Oil Business Kit is a straightforward entry point for a first hair-care product.