This is a professional-use product for licensed colorists and salons, not a home DIY kit. It suits stylists who want an ammonia-free permanent option for clients seeking full grey coverage without the strong odor of a traditional ammonia formula, and who are working through remaining stock of a line Matrix has discontinued in favor of newer permanent color systems. It is not intended for an untrained consumer to mix and apply at home, permanent oxidative color requires strand testing, timing control, and technique that a professional provides.

For a salon still holding stock, the appeal is the combination Matrix built the line around: full grey coverage from a permanent formula that skips ammonia's odor and instead uses an oil-based delivery mechanism to move color into the hair shaft, Matrix's answer to clients who wanted permanent, high-coverage color without the harsher processing experience of an ammonia line.

For professional use only. A licensed colorist should perform a strand and skin patch test in accordance with standard protocol before full application.

1. Mix ColorInsider color with ColorInsider Oil-Cream Developer at a 1:1 ratio by volume, in a non-metallic bowl, until smooth and creamy. Do not substitute a different developer.
2. Apply following standard permanent color application technique for the service being performed (full head, retouch, etc.).
3. Process for 35 minutes, checking color development per normal salon practice.
4. Rinse, shampoo, and condition as usual.

Pros: no ammonia means no sharp chemical odor during processing; the Oil Delivery System was designed to work color into the hair while limiting cuticle disruption; and Matrix's own marketing at launch claimed full, 100% grey coverage rather than partial blending.

Cons: because the line is discontinued, shade availability and future restocking are not guaranteed, so salons relying on it should have a backup line in mind; it can only be mixed with Matrix's own ColorInsider Oil-Cream Developer, substituting another brand's developer will not perform as expected; and as with any permanent oxidative color, it still requires a patch test and professional judgment on timing for different hair conditions.