A Hydrating Makeup Primer for Discoloration (typically around 120ml in spray or serum form) is a multi-functional cosmetic product designed to deeply moisturize the skin while correcting uneven skin tones and enhancing makeup longevity. [1, 2, 3, 4]
Based on popular products, these primers often act as a 3-in-1 solution—functioning as a moisturizer, primer, and setting spray, or a serum that preps the skin. [1, 2, 3, 4, 5]

Key Features and Benefits
Color Correction & Brightening: Many hydrating primers contain ingredients like Niacinamide or Vitamin C to target uneven skin tone, dark spots, and dullness, helping to create a brighter, more uniform complexion.
Deep Hydration: These formulas are designed for dry or dehydrated skin, often featuring Hyaluronic Acid to keep the skin plump and prevent makeup from turning patchy or flaking.
Smoothing and Blurring: They minimize the appearance of pores and fine lines, providing a smooth, canvas-like base for foundation.
Long-Lasting Hold: By creating a protective barrier, they help makeup stay in place, reducing the need for touch-ups. [1, 2, 3, 4, 5]
Key Ingredients to Look For
Hyaluronic Acid: Provides intense moisture to plump the skin.
Niacinamide (Vitamin B3): Works to reduce skin discoloration and improve texture.
Vitamin C: Brightens and enhances natural glow.
Botanical Extracts/Oils: Such as Aloe Vera or Green Tea to soothe and nourish. [1, 2, 4]
Common 120ml Options
Hilary Rhoda 3-in-1 Primer Spray: A popular water-based, 3-in-1 spray that hydrates, blurs pores, and acts as a setting spray.
Jiwoo Pore Tightening/Hydrating Mist: A 120ml transparent spray focused on hydrating and tightening pores. [1, 3, 4]

How to Use
Prep: Cleanse and apply your daily moisturizer.
Apply: Spray or apply the primer evenly over the face.
Set: Let it absorb for 1–2 minutes to create a tacky, smooth base for your foundation. [1, 2, 3, 4]