When it comes to moisturizers, not all ingredients work the same way. While humectants draw moisture into your skin, emollients and occlusives help keep it there.
These two categories (emollients vs occlusives) often get mixed up because they both aim to support your skin barrier and reduce water loss, but they work through slightly different mechanisms.
If you’d like a refresher on humectants first, you can read our Hyaluronic Acid vs Glycerin: The Ultimate Humectant Showdown.
In this article, we’ll break down what makes emollients and occlusives unique, how to tell them apart, and how to pick the right ones for your skincare routine or formulation projects.
Table of Contents
What Are Emollients?
Emollients are ingredients designed to make the skin feel softer and more flexible by filling in tiny gaps between skin cells. When the skin barrier is compromised (whether from dryness, irritation, or aging) emollients help replenish the lipids that keep your skin smooth and resilient.
They don’t necessarily draw in water or create a strong seal like occlusives do, but they improve the skin’s texture and reduce that rough, tight feeling you get when your skin is dehydrated.
How Emollients Work
Emollients work by integrating into the spaces between corneocytes (the cells on the outermost layer of your skin). They act almost like a mortar between bricks, helping to smooth out uneven areas and reinforcing your natural barrier.
Common Emollient Ingredients
Here are some examples you’ll see often in skincare formulations:
- Plant Oils (e.g., squalane, jojoba oil, sunflower oil)
- Butters (shea butter, mango butter)
- Fatty Alcohols (cetyl alcohol, stearyl alcohol)
- Esters (isopropyl palmitate)
- Silicones (dimethicone)
Key Benefits
- Improves skin softness
- Reduces flakiness
- Supports barrier repair
- Enhances spreadability in creams and lotions
What Are Occlusives?
Occlusives are ingredients that create a physical barrier on the surface of the skin to slow down transepidermal water loss (TEWL). While emollients smooth the skin’s texture, occlusives act more like a protective film that traps moisture inside and shields your skin from environmental stressors.
This makes them particularly valuable for people with very dry, compromised, or sensitized skin, as well as for preventing water loss in harsh climates.
How Occlusives Work
Occlusives form a semi-occlusive or fully occlusive layer over the stratum corneum (the outermost layer of your skin). This layer physically blocks evaporation, helping to maintain hydration levels even when the surrounding air is dry.
Common Occlusive Ingredients
Some of the most effective occlusives include:
- Petrolatum (Petroleum Jelly): Considered the gold standard; can reduce water loss by up to 99%.
- Mineral Oil
- Beeswax
- Lanolin
- Silicones (e.g., dimethicone)
- Plant Waxes and Butters
Key Benefits
- Forms a protective barrier
- Prevents moisture loss
- Soothes very dry, chapped skin
- Protects against irritants and friction
Humectants vs Emollients vs Occlusives
While emollients and occlusives both help prevent moisture loss, humectants play an entirely different role by actively drawing water into the skin. A truly effective moisturizer often combines all three types of ingredients to hydrate, repair, and protect your skin barrier.
The diagram below illustrates how each category works:
What Makes Humectants Unique
Humectants (like glycerin, hyaluronic acid, and propanediol) attract water either from the environment or from deeper layers of your skin. This increases the water content of the stratum corneum, making your skin look plumper and feel more hydrated.
✅ Related Reading: Hyaluronic Acid vs Glycerin: The Ultimate Humectant Showdown.
Combining All Three for Best Results
- Humectants: Bring in moisture.
- Emollients: Smooth and soften the skin.
- Occlusives: Seal everything in.
Layering them in the right order—humectant first, emollient second, occlusive last—helps you achieve the most effective hydration.
Benefits and Drawbacks of Emollients
Emollients are widely loved for their ability to improve the look and feel of the skin. But like any ingredient, they have pros and cons depending on your skin type and how you use them.
Benefits
✅ Smoother Texture: Emollients soften rough patches and help flaking areas look healthier.
✅ Barrier Support: They replenish missing lipids, making the skin more resilient to irritation.
✅ Flexible Formulation: Emollients can be lightweight (like esters and squalane) or richer (like shea butter), so they suit many product types.
✅ Immediate Comfort: They relieve tightness and dryness almost instantly.
Drawbacks
⚠️Potential Greasiness: Richer emollients may leave a heavy film that some people find uncomfortable.
⚠️Pore Congestion: If overused or poorly formulated, some emollients can contribute to clogged pores, especially on oily skin.
⚠️Limited Occlusion: They don’t prevent moisture loss as effectively as true occlusives—so pairing them with an occlusive may be necessary in very dry conditions.
Benefits and Drawbacks of Occlusives
Occlusives are some of the most effective ingredients for preventing moisture loss, especially when the skin barrier is damaged or exposed to harsh environments. However, their powerful sealing action also comes with considerations.
Benefits
✅ Excellent Moisture Retention: Occlusives significantly reduce transepidermal water loss (TEWL), helping the skin stay hydrated longer.
✅ Barrier Protection: They form a shield against wind, cold, and irritants. Ideal for compromised skin.
✅ Soothing Effect: Many occlusives can calm irritation and create a feeling of comfort on very dry or cracked areas.
✅ Enhanced Healing: Occlusive dressings are commonly used in dermatology to aid wound healing by maintaining a moist environment.
Drawbacks
⚠️Heavy Feel: Occlusives often leave a noticeable layer on the skin, which some find greasy or suffocating.
⚠️Acne-Prone Caution: For oily or acne-prone skin, heavy occlusives can potentially clog pores and trigger breakouts if used improperly.
⚠️Limited Hydration Alone: They don’t add moisture, so pairing with humectants is usually necessary to hydrate and then seal in water.
When Should You Use Each?
Choosing between emollients and occlusives isn’t always straightforward, it depends on your skin type, climate, and even the season. Understanding when each is most beneficial will help you make smarter choices, whether you’re creating a formula or planning your daily routine.
For Dry or Dehydrated Skin
- Emollients help restore flexibility and smoothness when your skin feels rough and tight.
- Occlusives are essential when you need to lock in moisture and prevent further water loss.
- Best Approach: Combine humectants (to draw in moisture), emollients (to soften), and occlusives (to seal).
For Oily or Acne-Prone Skin
- Lighter emollients (like squalane or esters) provide softness without heavy residue.
- Use occlusives sparingly, focusing on targeted areas or very dry patches.
- Avoid thick petrolatum-based occlusives on areas prone to congestion.
Climate and Seasonal Considerations
- Cold or Windy Weather: Occlusives become crucial to protect against environmental moisture loss.
- Humid Conditions: You might prefer lighter emollients and minimal occlusives.
- Indoor Heating or Air Conditioning: Even oily skin can benefit from emollient-based formulas when the air is very dry.
How to Combine Them for Maximum Results
While each category of moisturizer has its strengths, combining them strategically creates a more balanced approach to hydration and barrier repair.
The Layering Method
Start by applying humectants first, such as a serum with glycerin or hyaluronic acid. This step increases the water content in your upper skin layers.
Follow with an emollient-rich moisturizer to smooth and reinforce the lipid barrier. This helps the skin feel softer and more comfortable.
Finish with an occlusive layer if needed (especially in dry climates or overnight) to seal in all the hydration and prevent evaporation.
Formulation Strategies
If you’re formulating skincare products:
- Humectants are typically used at 1–10% concentrations depending on the molecule.
- Emollients can range widely, from lightweight esters to rich butters.
- Occlusives are often included at 5–30% depending on the desired level of occlusion.
Adjust ratios based on:
- Target skin type
- Desired finish (matte or dewy)
- Seasonal needs
Frequently Asked Questions
Here are some of the most common questions people ask about emollients and occlusives, answered simply and clearly:
Can I use an occlusive without an emollient?
Yes, but it may not feel as comfortable. Occlusives alone seal in whatever moisture is already present, so pairing them with emollients and humectants usually gives better results.
Are all oils occlusive?
No. Some oils are primarily emollient (like squalane), while others have partial occlusive properties (like mineral oil). The level of occlusion depends on the oil’s composition and how it sits on the skin.
Are emollients comedogenic?
Not inherently. Some emollients (like esters and certain lightweight silicones) are low risk for pore clogging, while richer plant butters or fatty acids can be comedogenic for some skin types
Should oily skin avoid occlusives completely?
Not necessarily. Occlusives can be beneficial in small amounts or applied only to dry patches. It’s more about finding the right texture and formula than avoiding them altogether.
Do occlusives hydrate the skin?
No. Occlusives don’t add water, they only prevent water from evaporating. That’s why combining them with humectants is key if your skin is dehydrated.
