Should I apply primer first or sunscreen first?
Jun 03, 2020
Source: Cainiu Health
Dr. Liu Wan
Introduction
Which should be applied first: sunscreen or primer?
1. Apply sunscreen first. Sunscreen is considered a skincare product and is typically used after completing your regular hydration and skincare routine. Applying sunscreen after hydrating the skin yields optimal protection.
2. Apply primer afterward. Primers are essentially cosmetic products. If applied before sunscreen, they may interfere with the sunscreen’s efficacy; therefore, applying sunscreen first ensures maximum sun protection.
As a makeup primer, isolation cream should be applied first before applying makeup. It creates a protective barrier between cosmetics and the skin while also facilitating smoother makeup application. Sunscreen, however, should be applied last—as the outermost layer—to provide optimal protection against ultraviolet (UV) radiation.
Should You Apply Isolation Cream or Sunscreen First?
1. Apply Sunscreen First
Sunscreen is classified as a skincare product. Many people mistakenly believe sunscreen should not be applied first, fearing it may clog pores and cause acne or comedones by impeding normal skin respiration. In reality, key active ingredients in sunscreen formulations are specifically designed to interact safely with human skin. These ingredients form a protective film that effectively blocks UV radiation. Moreover, sunscreen is typically applied after completing your regular skincare routine—including hydration—ensuring optimal efficacy when the skin is well-moisturized.
2. Apply Isolation Cream After Sunscreen
Isolation cream is fundamentally a cosmetic product—not a physical barrier against all chemical or physical substances. While its primary purpose is to shield the skin from environmental pollutants, it also helps minimize potential irritation or damage caused by makeup. Applying isolation cream before sunscreen can compromise the latter’s UV-protection efficacy. Additionally, if the isolation cream rubs off unevenly, it may lead to inconsistent sunscreen coverage and reduced protection.
Physical Sun Protection Methods
1. During periods of intense sunlight, wear dark-colored clothing rather than white. While white fabric reflects heat, it offers minimal UV protection.
2. Wear a wide-brimmed, light-colored sun hat and/or carry an umbrella when outdoors under strong sunlight.
3. Wear UV-protective clothing (e.g., UPF-rated garments) to safeguard exposed skin.
4. Use sunscreen: Apply it 10–20 minutes before going outdoors. Use at least 1–2 mL per application—enough to ensure adequate thickness—for optimal UV protection.
The above outlines the correct sequence for applying isolation cream versus sunscreen.
