Leave-in Conditioner Keracare Leave-in Conditioner. This leave-in conditioner provides long-lasting hydration, leaving hair soft, supple and manageable. As an added bonus, it protects against thermal damage caused by UV rays and heat from styling appliances. Lightweight and non-weighting, it is suitable for all textured hair types, while offering UV protection and pH balance. By applying generously to clean, wet hair, gently detangling and styling without rinsing, this treatment will quickly become an essential part of your hair routine.