ISO Option EXO is a professional exothermic perm engineered for energized, resilient curls on longer and resistant hair. The self-heating ISO-Thermalizer activator warms the waving lotion so it diffuses evenly through the hair — no external heat needed — while the thio-free, damage-free Isoamine formula waves without aggressively lifting the cuticle.
Processing guide: approximately 20 minutes for resistant hair; maximum 10 minutes for tinted hair. Professional use recommended.