Aerosol sunscreens; when do I endorse them & why?

Aerosol sunscreens; when do I endorse them & why?

By Dr Davin Lim, Procedural Dermatologist, Brisbane & Sydney

Aerosol sunscreens; when do I endorse them & why?

By Dr Davin Lim
Cutis Dermatology
Dermatologist, Brisbane

Aerosol sunscreens summary; Davin’s Tips. 

Here are my favourite go to tips on sunscreens:

  • SPF measurement of real world application of aerosol sunscreens rangers between 2-4.
  • This is primarily due to under application of sunscreen as the mist creates a thin layer.
  • Aerosol sunscreens contain enough product for only two to three full body applications.
  • Half the container’s weight is made up of propellant.
  • Despite these facts I still endorse aerosols only on the basis that they allow my team and I to get the job of pigment fading faster.
  • This especially applies to those who don’t reapply sunscreen due to make up.
  • A SPF of 2 is better than a SPF of zero. 

Which is better – aerosol sunscreens or lotions and creams?

Both aerosol and lotion sunscreens can be effective in protecting against sun damage, but they have different application methods and may be better suited for different situations.

Aerosol sunscreens are spray-on products that can be convenient for hard-to-reach areas like the back or legs. However, they can be more difficult to apply evenly, and it’s important to use them in a well-ventilated area and to avoid inhaling the spray.

Lotion sunscreens, on the other hand, can be more easily applied evenly and can be more gentle on the skin. They can be more difficult to apply to hard-to-reach areas and may require more time to rub in.

Ultimately, the choice between aerosol and lotion sunscreens depends on personal preference and what works best for your specific needs. It’s important to choose a sunscreen with an SPF of at least 30, and to reapply it every 2 hours or after swimming or sweating.

Understanding basic SPF measurement- how this helps.

SPF (Sun Protection Factor) is a measure of the effectiveness of a sunscreen in protecting the skin from the sun’s ultraviolet B (UVB) rays.

SPF is determined by measuring the amount of time it takes for UVB rays to cause sunburn on protected skin compared to unprotected skin. For example, if it takes 20 minutes for your skin to turn red without sunscreen, and you are using a sunscreen with an SPF of 15, it would take 15 times longer, or 5 hours, for your skin to turn red with the sunscreen.

The SPF rating is determined by applying 2 milligrams of sunscreen per square centimetre of skin and then measuring the minimal erythemal dose (MED) which is the minimal amount of UV radiation required to cause sunburn. This measurement also applies to aerosol sunscreens- minus the propellant. 

It’s important to note that while the SPF rating is a good indicator of a sunscreen’s effectiveness against UVB rays, it does not provide information about a sunscreen’s ability to protect against ultraviolet A (UVA) rays, which penetrate deeper into the skin and can cause aging and skin cancer.

It’s also important to note that, regardless of the SPF, sunscreen needs to be reapplied every 2 hours or after swimming or sweating, in order to be effective. A higher SPF sunscreen can provide a bit more protection and a longer time frame before needing to be reapplied, but it doesn’t mean that you can stay in the sun for a whole day with a single application of sunscreen.

What is the difference between chemical and physical sunscreens?

Chemical sunscreen and physical sunscreen are two different types of sunscreen that work in different ways to protect the skin from the sun’s harmful ultraviolet (UV) rays.

Chemical sunscreen: Chemical sunscreen contains ingredients that absorb UV rays and convert them into heat, which is then released from the skin. The most common ingredients in chemical sunscreens are oxybenzone, octinoxate, avobenzone, octisalate, octocrylene and homosalate. These ingredients work by absorbing UV rays and neutralising them before they can damage the skin. Chemical sunscreens typically take around 20 minutes to fully absorb into the skin and to start working.

Physical sunscreen: Physical sunscreen, also known as mineral sunscreen, contains ingredients such as zinc oxide and titanium dioxide. These ingredients work by sitting on top of the skin and reflecting and scattering UV rays away from the skin. Physical sunscreens provide immediate protection upon application, and they are less likely to cause skin irritation and allergic reactions. They are also more environmentally friendly, as they don’t contain any ingredients that may be harmful to marine life.

Both types of sunscreen can be effective in protecting the skin from sun damage, but they have different application methods, and may be better suited for different situations. Chemical sunscreens are usually lighter and more cosmetically elegant, and can be easier to apply and rub in, but some people might experience skin irritation or allergic reactions. Physical sunscreens tend to be thicker and can leave a whitish cast on the skin, but they are usually more gentle on the skin and can be a good option for people with sensitive skin.

🙄 How to choose between alpha hydroxy & beta hydroxy acids! Keep reading & share if you find this post useful 😄

🔬Skin science: Alpha-hydroxy acid (AHAs) include #glycolicacid #lacticacid #citricacid #malicacid and #mandelicacid.

AHAs are also known as ‘fruit acids’ 🍊 historically these acids have been in use since the days of the pyramids🗻(True!) AHAs exfoliates the upper layers of skin (epidermis), hence its role in treating unwanted pigmentation. AHA’s also work in the deeper layer of skin, stimulating #collagen, hence its use as a powerful anti aging skincare active.

🧽 Salicylic acid (BHA) is fat soluble and has enhanced penetration into pores and sebaceous glands, hence its use in treating acne and blackheads. BHAs also have anti-inflammatory properties, useful in acne prone skin.

✔AHA’s Best For: Chemical exfoliation, skin pigmentation, #melasma, #freckles, #sundamage, photodamage, wrinkles and collagen building.
.
✔BHA’s Best For: #blackheads, #whiteheads, #congestedskin, #acne, #pimples #oilyskin
.
🎬 Action: Shop my favourite cosmeceutical ranges on @theformulated

⚠️Caution:Sensitive skin warning. If you have rosacea, dermatitis or just angry skin, procede with caution.
.
😎Davs Protip: AHAs and BHAs form the foundation of #cosmeticpeels performed by #dermatologists. For AHA office peels I start at 20%, then 35%, 50% then 70%, whilst for #BHApeels I start at 15%, going up to 30% salicylic acid. Simple preps like Vaseline at the corner of the nose can reduce burns from AHAs. I rate hydroxy acids as one of my top 3 ingredients 👌

Dr Davin Lim @cutis_dermatology @theformulated
.
Don't forget the sunscreen 🌞
...

377 6

Your skin barrier function is one of the most critical parts of your skin health.
.
.
🔬Skin Science: Your skin is super efficient at keeping out infection as well as irritants & molecules that can predispose to skin allergies. The outermost layer of your skin, known as the stratum corneum is the first line of defence. Skin barrier function can be disrupted in conditions such as atopic dermatitis (eczema), acne, rosacea, as well as self-inflicted causes such as over-exfoliation.
.

👍🏻👀Repair: Simplify to amplify. Stop ALL your skincare products, yes, that includes sunscreen (only for a few days). Halt all your skincare actives, including your #retinol #retinoids, #ascorbic acid, #AHAs, #BHAs & harsh cleansers. In most cases barrier function can be re-established in 2-5 days, longer if you have dermatitis, rosacea or other skin conditions. In some cases a medical #dermatologist can guide you
.
.
🤔🛒Ingredients to help barrier function: Include hyaluronic acid, squalene, ceramides, tocopherol & linoleic acid. The first #skincare active you should use once barrier function is established, is niacinamide
.
🐟🛢Diet: some evidence that supplementation with omega fatty acids can help
.
😎Dr Davin Lim
@the.formulated
Brisbane🇦🇺
.
.

#dermatoloigstbrisbane #skinscience #instaskincare #skincarecommunity #acne #rosacea #niacinamide #skinbarrier #skinbarrierfunction #skincaretips #skinhealth #healthyskin #organicskincare #skincareroutine #drdavinlim #sensitiveskin #sensitiveskincare
...

1127 14

Stick to this simple skincare pyramid for best results
.
.
👍🏻Prevention is with sunscreen. Spf 50 +, twice a day. Buy something you actually LIKE to use. IMO choosing a cosmetically elegant product with less sun protection is a compromise between application and SPF rating.
.
.
🛡Protect with antioxidants including vitamin E, ferulic acid, ascorbic acid, #resveratrol, CoQ10, green tea & botanicals
.
.
🍊Supplement with vitamins including retinol/retinoids, niacinamide & vitamin C
.
.
🖌Correct (if needed) with anti-acne, anti-inflammatory, or anti-pigment
.
.
💯Purposeful skincare saves time, money, and provides the best outcomes
.
😎Dr Davin Lim
Dermatologist
@drdavinlim
Brisbane🇦🇺
.
.
#acneskincaretips #dermatology #drdavinlim #davinlim #theformulated #skincarescience #skincareroutine #simpleskincare #retinoltips #retinol #skincarebasics #instaskincare #skincarecommunity #cosmeticdoctor #dermatologist #dermatologistbrisbane #ascorbicacid #skinhealth #healthyskintips #healthyskin
...

618 5

ATTENTION to those who suffer from #SENSITIVESKIN

Consider going on a 7 day “SKIN FAST” 📅
* No Makeup
* No Sunscreen
* No Retinoids

WHY? Because all the active ingredients and chemicals you’ve been constantly using on your face may have breached the upper layer on your skin.. causing both irritation and allergies 🦠

If there’s such thing as a #SKINDETOX this is it. Stop the use of all your products and let your skin barrier heal.🧘🏼‍♀️

Only time I would say no to sunscreen..🧴

Drop a 🙋🏼‍♀️ if you suffer from sensitive skin.


Dr Davin Lim
@cutis_dermatology @theformulated




#Dermatology #DrDavinLim #Rosacea #Dermatitis #Skincare #Bare #Nomakeup #Skinhealing #Acne #Acnescarring #Skinlayers #Naturalskincare #Skinrejuvenation #Skincaretips #Acnefree #Remedies #skincarecommunity #brisbanedermatologist
...

289 22

Did you know the majority of wrinkles can be prevented with simple skincare?
.
🔬Skin Science: Wrinkles can be divided into dynamic wrinkles (lines that move) & static wrinkles, lines at rest. The main causes of acquired wrinkles are a loss of collagen, elastin & hyaluronic acid. UV, pollution & smoking are the main causes of premature wrinkling
.
🙄How to fix wrinkles: The best wrinkle is the one you never had. If you have fine wrinkles, simple skincare & chemical peels can make a big difference. Deeper wrinkles respond to lasers & injectables.
.
📋Skin care: Sunscreen reduces collagen destroying UV rays from reaching the dermal layer of skin. Invest in sunscreen that you like to use. Use it at least twice a day. Skin care actives including retinol, niacinamide & ascorbic acid can reduce free radicals & build collagen. Skin acids including #AHAs such as #glycolicacid, #citricacid & #lacticacid can smooth out creases & sun damage.
.
🍊Chemical Peels: Fruit peels & super-strength retinol peels can improve skin texture. A simple skincare routine incorporates monthly peels
.
⭐️Laser resurfacing: Depending on the level of wrinkling & skin ageing, different lasers can be employed. #fraxel for mild cases, #co2resurfacing for mega cases.
.
💉Botox: The number 1 treatment for dynamic wrinkles. It works. Injections also prevent wrinkles
.
👍🏻Dermal fillers: Probably my favourite procedure. Why? No downtime, instant results. Fillers can reduce wrinkles almost everywhere including the face, chest & neck.

😎Davin’s Protip: With the amount of UV exposure in Australia, lasers play an important role in #skinrejuvenation however it is the BALANCE between improving textural change, skin tightening (via lasers / collagen stimulation) & most importantly volume replacement (fillers/ #fattransfer), that best & most NATURAL results.
.
.
Dr Davin Lim @cutis_dermatology
Brisbane, Australia 🇦🇺
.
.
#beautytips #skincarecommunity #antiaging #esthetics #Skincare #wrinkles #collagen #sunscreen #retinol #niacinamide  #ascorbicacid #retinolpeels #skincareroutine
...

1016 16

THE SUN IS HOT ☀️
SKIN CANCER IS NOT 🚫
.
SPF is determined by measuring the amount of time it takes for UVB rays to cause sunburn on protected skin compared to unprotected skin.
.
For example, if it takes 20 minutes for your skin to turn red without sunscreen, and you are using a sunscreen with an SPF of 15, it would take 15 times longer, or 5 hours, for your skin to turn red with the sunscreen.
.
Drop a 🧴 if you applied today.
#drdavinlim #sunsafety #antiaging #repost #skincancer #Skincare #skincaretips #sun #australia #spf
...

2547 70

A Breakdown of Retinoids
.
Retinoids are a vitamin A derivative, and include retinol, tretinoin, retinyl palmitate, retinaldahyde, adapalene & tazarotene.
.
Remember with ANY of these, your skin will become more sun sensitive, so twice daily minimum you need to be applying a UVB & UVB blocking sunscreen with the highest SPF you can find, ESPECIALLY if you live in Australia!
.
.
Dr Davin Lim 
@101.skin @cutis_dermatology
.
#retinol #skincare #skinhacks #dermatologist #retinoids #tretinoin #lifehacks #skincaretips
...

831 12

Skin barrier function is critical for skin health
.
.
🔬Skin Science: Your skin is super efficient at keeping out infection as well as irritants & molecules that can predispose to skin allergies. The outermost layer of your skin, known as the stratum corneum is the first line of defence. Skin barrier function can be disrupted in conditions such as atopic dermatitis (eczema), acne, rosacea, as well as self-inflicted causes such as over-exfoliation
.
.
👍🏻👀Repair: Simplify to amplify. Stop ALL your skincare products, yes, that includes sunscreen (only for a few days). Halt all your skincare actives, including your #retinol #retinoids, #ascorbic acid, #AHAs, #BHAs & harsh cleansers. In most cases barrier function can be re-established in 2-5 days, longer if you have dermatitis, rosacea or other skin conditions. In some cases a medical #dermatologist can guide you
.
.
🤔🛒Ingredients to help barrier function: Include hyaluronic acid, squalene, ceramides, tocopherol & linoleic acid. The first #skincare active you should use once barrier function is established, is niacinamide
.
🐟🛢Diet: some evidence that supplementation with omega fatty acids can help
.
😎Dr Davin Lim
@the.formulated
Brisbane🇦🇺
.
.
#skinbarrier #skinbarrierfunction #skincaretips #skinhealth #healthyskin #organicskincare #skincareroutine #drdavinlim #sensitiveskin #sensitiveskincare #dermatoloigstbrisbane #skinscience #instaskincare #skincarecommunity  #acne #rosacea #niacinamide
.
.
Disclaimer: I am a procedural dermatologist. I cut, lase, peel, fill, inject. For medical conditions including managing sensitive skin, my colleagues @cutis_dermatology can assist.
For skincare advice my clinical team of nurses & dermal therapist will guide you. 👌🏻
...

1383 21
This error message is only visible to WordPress admins
Error: Connected account for the user 101.skin does not have permission to use this feed type.

 

What is the difference between UVB and UVA protection?

UVB (ultraviolet B) and UVA (ultraviolet A) are both types of ultraviolet radiation that can be harmful to the skin. The main difference between the two is in their wavelength and their effects on the skin:

  • UVB rays have a shorter wavelength and are responsible for sunburn and most skin cancers. They are also the primary cause of sunburn and are most intense during the middle of the day.
  • UVA rays have a longer wavelength and are responsible for ageing and wrinkling of the skin, as well as the development of skin cancer. They are present in both natural and artificial light sources, and are present throughout the day, even on cloudy days.

When choosing a sunscreen, it’s important to look for a product that offers “broad-spectrum” protection, meaning it protects against both UVA and UVB rays. Sunscreens that are labelled as “broad-spectrum” should protect against both UVA and UVB rays, and not just UVB rays.

Also, it’s important to look for a sunscreen with an SPF (Sun Protection Factor) of at least 30. The higher the SPF, the more protection it provides against UVB rays, which cause sunburn.

It’s also worth noting that, while UVB rays are the primary cause of sunburn, UVA rays can penetrate deeper into the skin, and are responsible for ageing and skin cancer. So, it’s very important to use a sunscreen that provides protection against both UVA and UVB rays, not just UVB rays.

Is protection against visible HEV or high energy visible light important?

HEV (high-energy visible) or blue light is a type of light that is emitted by electronic devices such as smartphones, tablets, and computers, as well as by the sun. It has been found that prolonged exposure to blue light can cause damage to the skin, including hyperpigmentation, uneven skin tone, and wrinkles. This is especially true for darker skin types. 

Currently, not all sunscreens on the market specifically protect against HEV or blue light, but some sunscreens include ingredients such as antioxidants that can help to protect the skin from the harmful effects of blue light. Here are some ingredients that can offer protection against HEV or blue light:

  • Iron oxides: are the best for reducing HEV, these are found in makeup and some sunscreens in Australia and overseas.
  • Vitamin C: This antioxidant can help to protect the skin from damage caused by blue light. It can also help to brighten the skin and reduce the appearance of dark spots.
  • Niacinamide: This ingredient can help to protect the skin from blue light damage by reducing inflammation and strengthening the skin’s natural barrier.
  • Resveratrol: This antioxidant can help to protect the skin from blue light damage by neutralising free radicals and reducing inflammation.
  • Ferulic acid: This ingredient can help to protect the skin from blue light damage by neutralising free radicals and boosting the effectiveness of other antioxidants.
  • Zinc oxide and titanium dioxide: These mineral-based ingredients provide physical sun protection by reflecting and scattering UV and blue light.

How often should you apply sunscreen (the real world answer)?

The ideal answer differs from the real world answer. Practically, at least once a day for office jobs, twice a day if you are trying to shift pigment such as melasma. More frequently if you have an outside job or exercising – participating in water activities.

The generic answer (awesome in theory but impractical for 95% of patients) is as follows-

It is recommended to reapply sunscreen every 2 hours or after swimming or sweating, regardless of the sunscreen formulation, whether it is a lotion, cream, spray or aerosol.

Here are some tips to help ensure that you are reapplying sunscreen correctly:

  • Make sure to use enough sunscreen to cover all exposed skin. A shot glass worth (around 1 oz or 30 ml) of sunscreen is recommended for an adult to cover the whole body.
  • Applying sunscreen 15-30 minutes before going out in the sun gives the skin time to absorb the sunscreen and increases its effectiveness.
  • Reapply sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
  • Remember that sunscreen can be rubbed or washed off, so it’s important to reapply it after towelling off.

It’s also important to note that, even with consistent and correct sunscreen use, it is still possible to get sunburned. Sunscreen should be used in conjunction with other sun protection measures such as wearing protective clothing, seeking shade during peak sun hours and staying indoors during extreme sun conditions.

Additionally, if you are going to be spending a lot of time in the sun, especially if you are going to be in and out of the water, it’s best to choose a water-resistant sunscreen with a higher SPF.

How to choose an aerosol sunscreen?

There is no one “best” aerosol sunscreen as different products may be more suitable for different skin types, preferences, and needs. However, when looking for an aerosol sunscreen, some factors to consider include:

  • SPF: Look for a sunscreen with an SPF of at least 50. The higher the SPF, the more protection it provides against UVB rays, which cause sunburn.
  • Broad-spectrum: Choose a sunscreen that offers broad-spectrum protection, meaning it protects against both UVB and UVA rays. UVA rays penetrate deeper into the skin and can cause ageing and skin cancer.
  • HEV protection: especially important for ethnic skin as blue light can flare up pigmentation conditions such as melasma and hyperpigmentation. 
  • Ingredients: Look for sunscreens that contain mineral-based ingredients such as zinc oxide and titanium dioxide. These ingredients are less likely to harm the environment and to cause skin irritation. Avoid sunscreens that contain oxybenzone and octinoxate, which can be harmful to coral reefs and other marine life.
  • Water-resistant: If you plan to be in the water or sweating a lot, look for a sunscreen that is water-resistant.

Some examples of aerosol sunscreens that are considered environmentally friendly, mineral-based and spf 30+ are:

It’s always recommended to check the product reviews, ratings and read the ingredients before purchasing. 

How do you apply sunscreen over makeup?

To apply sunscreen over makeup, follow these steps:

  1. Start with a clean and moisturized face.
  2. Apply your regular makeup routine, such as foundation, concealer, and powder.
  3. Once your makeup is applied, wait a few minutes for it to set.
  4. Take a small amount of sunscreen and gently pat it over your face, being careful not to disturb your makeup.
  5. Allow the sunscreen to dry for a few minutes before applying any additional makeup or heading outside.

It’s also important to note that you should use a sunscreen that is designed for use on the face and is non-comedogenic, so it won’t cause breakouts.

Do inbuilt sunscreens in makeup work?

Some makeup products, such as foundation and powder, contain a small amount of sunscreen to provide some protection against the sun. However, it is not recommended to rely solely on makeup with sunscreen for sun protection especially in the context of treating melasma and pigmentation. The amount of sunscreen in makeup is generally not enough to provide adequate protection, and it may not be evenly applied to the skin.

Are aerosol sunscreen bad for the environment?

Aerosol sunscreens can have a negative impact on the environment, particularly when they are used in outdoor or marine environments.

One of the main concerns is that the small particles in aerosol sprays can be inhaled and may cause respiratory problems for some people. Additionally, the small particles can also settle on surfaces such as water and sand, potentially harming aquatic life.

Another concern is that the chemicals in the sunscreen can harm coral reefs and other marine life. Oxybenzone and octinoxate, which are common ingredients in many sunscreens, can be toxic to coral and other marine life and have been known to cause coral bleaching and damage to coral reefs.

It’s worth noting that not all aerosol sunscreens are harmful to the environment and that there are also eco-friendly alternatives available. Sunscreens with mineral-based ingredients such as zinc oxide and titanium dioxide are considered more environmentally friendly options, and also some sprays are formulated with biodegradable materials, which reduce the environmental impact.

It’s important to read the labels and ingredients of the sunscreen product you are using and to be mindful of how and where you are applying it. Also, consider carrying a reef-safe sunscreen when you go to the beach or to the ocean.

What are other ‘additives’ found in aerosol sunscreens?

Aerosol products are pressurised and use a propellant to dispense the product from the can. One of the biggest disadvantages of sunscreen sprays – aerosols is that they can’t be carried on board aircraft as cans are pressurised. The other thing to consider is that you are adding hydrocarbons to the environment. There are several types of propellants that are commonly used in aerosol products, including:

  • Compressed gases: These include gases such as carbon dioxide (CO2) and nitrogen (N2), which are used to pressurise the product. They are non-flammable, non-toxic and are considered safe for use in consumer products.
  • Hydrocarbons: These include propane and butane, which are commonly used in aerosol products such as hair sprays and deodorants. They are flammable, but they are generally considered safe for use in consumer products if they are used in the right proportions.
  • Difluoroethane (HFC-152a): This is a hydrofluorocarbon (HFC) that is used as a propellant in some aerosol products. It is non-flammable and non-toxic, but it is a greenhouse gas and it can contribute to climate change.
  • Nitrous oxide (N2O): Commonly known as laughing gas, is a safe and non-toxic propellant used in whipped cream aerosol cans, cooking sprays and dental products.

Join the conversation

Join Dr Davin Lim on Instagram to stay up to date

@drdavinlim

Enquire now!

Get In Touch

Quick Contact

Dr Lim has unparalleled experience in dermatology. Fill in the form below and he will get back to you with your query
This field is for validation purposes and should be left unchanged.