You want a hair color that stays vibrant, covers grays completely, and treats your hair gently. In this comparison you’ll see how Blust On’s Long Lasting formula, Keyra Colors’ permanent dye, and standard oxidative dyes from Salerm measure up. We’ll look at durability, coverage, processing time, and hair-care benefits so you can pick the right hair color for your needs.
Compare Top Permanent Dyes-What hair color lasts the longest?
Blust On Long Lasting Formula
Blust On’s Long Lasting hair color uses pH-balanced ingredients enriched with hydrolyzed keratin, argan oil, and provitamin B5 to strengthen and nourish hair while delivering permanent, full gray coverage. You’ll get vibrant results that resist fading, thanks to a formula designed for softness and shine. Learn more at Blust On (https://www.blust-on.com/us/).
Keyra Colors Permanent Dye
Keyra Colors combines keratin and natural extracts to cover 100% of gray hair and lighten up to four tones. Its active ingredients fortify hair fiber and respect scalp health, giving you vibrant, long-lasting results without compromising smoothness or shine. Explore details at Keyra Colors (https://keyracolors.com/en/).
Salerm Oxidative Dyes
Permanent dyes from Salerm rely on oxidation chemistry to penetrate the cortex and lock in color through a single application. They deliver total gray coverage and enduring vibrancy, with a simple, safe process favored by professionals. Read more at Salerm (https://www.salerm.com/us_en/colouring/colouring-by-category/permanent-colour).
Evaluate Key Performance Factors
Coverage and Durability
- Blust On: Full gray coverage, vibrant hues that resist fading over 8–10 weeks
- Keyra Colors: 100% gray coverage, moderate fade resistance up to 8 weeks
- Salerm: Total gray coverage, standard durability up to 6–8 weeks
Hair Health and Shine
- Blust On: Hydrolyzed keratin and argan oil boost strength and softness
- Keyra Colors: Keratin and natural oils deliver conditioning benefits
- Salerm: Focused on color performance, with fewer added conditioning agents
Processing Time and Convenience
- Blust On PRO Fast Action: Ready in 10 minutes, a 70% reduction in processing time (Blust On)
- Keyra Colors: Standard 30–40 minute development
- Salerm: Typical 30–40 minute development
Review Developer Options
Choosing the right developer volume ensures optimal lift or tone deposit. Blust On offers:
- 5V for gentle toning
- 20V for gray coverage
- 27V for fast-action color in 10 minutes
- 30–40V for high-lift blondes and super-lightening services
Salerm and Keyra Colors also supply 20V for gray coverage and higher volumes for lifting, but Blust On’s dedicated fast-action option gives you salon-speed results without sacrificing durability.
Compare Features at a Glance
| Feature | Blust On Long Lasting | Keyra Colors Permanent | Salerm Oxidative Dye |
|---|---|---|---|
| Gray Coverage | 100% | 100% | 100% |
| Lasting Vibrancy | Up to 10 weeks | Up to 8 weeks | Up to 8 weeks |
| Conditioning Benefits | Keratin, Argan Oil, B5 | Keratin, Natural Oils | Basic emollients |
| Fast-Action Processing | 10 minutes (27V) | No | No |
| Lift Capability | Up to 7–9 tones (blond) | Up to 4 tones | Standard 1–3 tones |
Pick Your Best Match
- If you need speed plus lasting vibrancy, choose Blust On’s PRO Fast Action system.
- If hair conditioning and a gentle formula are your top priorities, Keyra Colors delivers shine and smoothness.
- If you prefer a cost-effective, widely used professional dye, Salerm oxidative colors offer proven performance.
Whichever option you select, you’ll find a hair color that stays true longer, covers grays completely, and supports your hair health.


