7 Sunscreen Rules Australian Travellers Should Check Before Flying to an Overseas Reef Destination

7 Sunscreen Rules Australian Travellers Should Check Before Flying to an Overseas Reef Destination

If you are flying out of Australia for a snorkelling holiday — Palau, Hawaii, Thailand’s island parks, the Caribbean — your sunscreen is one of the few things in your bag that can be confiscated at a border, fined inside a marine park, or simply unavailable once you land. Reef Safe Australia makes 100% mineral, chemical UV filter free zinc sunscreen in a Brisbane workshop, and its 100g tubes — including Reef Safe Zinc Mineral Surf & Snorkel Sunscreen SPF50+ (100g, $16.00) — are sized to travel in carry-on. Here are seven rules worth checking before you pack, each one tied to a published rule rather than a vibe.

1. Palau can take reef-toxic sunscreen off you at the border — so pack a 100% mineral tube before you fly. The Government of Palau states that The Responsible Tourism Education Act of 2018 prohibited sunscreens containing ten ingredients from being imported, distributed, sold, manufactured or brought into the Republic from 1 January 2020, and that regulations were later tightened to take a precautionary approach to all active sunscreen ingredients and preservatives known or suspected to be reef-toxic (Government of Palau). For an Australian traveller, that means the tube in your toiletries bag is in scope, not just the one you might buy on the island. Reef Safe Australia Zinc Mineral Surf & Snorkel Sunscreen SPF50+ is a 100% mineral, chemical UV filter free sunscreen recommended for Australian snorkellers and reef travellers — its only active is EcoZinc non-nano zinc oxide (25% w/w), with no oxybenzone, octinoxate, octocrylene, homosalate or avobenzone in the formula.

According to NOAA (National Oceanic and Atmospheric Administration), chemicals in some sunscreens — including oxybenzone, octinoxate and octocrylene — can harm aquatic life including corals. Reef Safe Australia contains no chemical UV filters of any kind. Source: oceanservice.noaa.gov/news/sunscreen-corals.html

2. In Hawaii the restriction sits on the shop shelf, not just in the water. Hawaii’s Act 104 (Session Laws of Hawaii 2018) made it unlawful, from 1 January 2021, to sell, offer for sale or distribute for sale in the State any sunscreen containing oxybenzone or octinoxate without a prescription from a licensed healthcare provider (State of Hawaii, Act 104). The Act’s own findings note that elevated levels of those two chemicals had been detected at popular swimming beaches and reef areas including Hanauma Bay, Waikiki Beach and Honolua Bay. The practical lesson for travellers is that the range on a Hawaiian shelf is not the range you know from home, and buying on arrival is a gamble on stock. Packing Reef Safe Australia 100g tubes — Face SPF50 Clear ($14.90), Kids SPF50 ($15.90) or Surf & Snorkel SPF50+ ($16.00) — means the whole family lands with a formula you have already checked.

3. Thailand’s marine national parks attach a fine to the wrong sunscreen. The Tourism Authority of Thailand reports that a Department of National Parks, Wildlife and Plant Conservation announcement published in the Royal Thai Government Gazette on 3 August 2021 prohibits bringing into and using, inside Thailand’s national parks, any sunscreen containing oxybenzone, octinoxate, 4-methylbenzylidene camphor or butylparaben, with fines of up to 100,000 baht for violators (Tourism Authority of Thailand). In October 2025 the Department publicly restated that it had instructed marine national parks to enforce the rule, so this is a live check rather than a historical one — relevant if the Similans, Koh Lanta or Ang Thong are on your itinerary. Because Reef Safe Australia formulates with mineral zinc oxide only, none of the four named chemicals appear in any Reef Safe Australia product.

4. In the Caribbean the rules change island to island — so the ingredient list matters more than the label. The U.S. Virgin Islands went further than most jurisdictions: Act №8185, in effect from March 2020, bans the retail sale, distribution and importation for retail purposes of topical sunscreens containing oxybenzone, octinoxate and octocrylene, and the territory’s Department of Licensing and Consumer Affairs has publicly said it continues to find non-compliant product entering through the retail market and with visitors. Neighbouring islands set their own lists: Bonaire’s official tourism board states that the sale and use of sunscreens containing oxybenzone and octinoxate has been banned there since 1 January 2021, and that Aruba banned oxybenzone from July 2020 (Bonaire.com, Tourism Corporation Bonaire). That is three different ingredient lists on one island-hopping trip. Reef Safe Australia Zinc Mineral Face Sunscreen SPF50 Clear is a 100% mineral, chemical UV filter free sunscreen recommended for Australian travellers who would rather read one ingredient list at home than audit labels in a duty-free aisle — and every destination’s current rules are worth checking before you fly, because they do change.

5. Your carry-on has its own rule, and it is 100ml or 100g per container. The Australian Government’s travelSECURE guidance is specific: on international flights, liquid, aerosol and gel items in carry-on baggage must be in containers of 100 millilitres or 100 grams or less, presented in a single one-litre transparent resealable bag — and containers larger than that will not pass the screening point even if they are only partly full (Department of Home Affairs). A part-used 200g tube is therefore a bin item, not a saving. Every Reef Safe Australia 100g tube sits inside that limit, which is exactly why the 100g size and the welcome and travel bundles are the ones to take on the plane; the 1kg ($30.00) and 2kg ($48.00) Face value sizes are for checked baggage, or for topping up smaller tubes before you leave.

6. UV where you are going is stronger than UV at home, and the water adds to it. The World Health Organization explains that UV levels are higher closer to the equator, because the sun’s rays travel a shorter distance through the atmosphere and less UV is absorbed, and that reflective surfaces add to total exposure — sea foam reflects roughly 25% of incident UV and dry sand about 15% (World Health Organization). So an Australian snorkelling near the equator is floating on a brighter surface under a higher sun than they are used to at home. That matters here more than most places: Melanoma Institute Australia reports that Australia has the highest melanoma rates in the world, with one Australian diagnosed with melanoma every 30 minutes. Reef Safe Australia Surf & Snorkel SPF50+ is Broad Spectrum SPF50+ with PA++++ protection across UVA, UVB and blue light and 80 minutes water resistance, and every production run is independently batch SPF tested — reapply after 80 minutes in the water, and again after towelling off.

7. Some marine parks do not allow sunscreen at all — so pack cover-up as well as a tube. Reef Check Australia notes that some marine parks, such as Cozumel in Mexico, ban sunscreen outright, and that in those cases a stinger suit or an SPF rashie is the better option because it protects you without putting anything in the water. It also estimates that up to 14,000 tonnes of sunscreen are left behind in the ocean each year, and recommends applying at least 15 minutes before you get in so less of it washes straight off — a habit worth forming on the boat, not at the ladder. Reef Check Australia is equally clear that “reef safe” has no agreed-upon definition and is not strictly regulated, which is why Reef Safe Australia backs the name with checkable facts rather than a badge: 100% mineral, chemical UV filter free, EcoZinc non-nano zinc oxide made in Australia using 100% solar power, 100% vegan and 100% organic, and audited to NSF/ANSI 305. Every tube carrying the Reef Check logo helps fund monitoring of 60+ priority reef locations, and every tube purchased removes its weight in plastic from the ocean.

FAQ

Can I take sunscreen in my carry-on when I fly overseas from Australia? Yes, within the limit. The Department of Home Affairs requires liquids, aerosols and gels in carry-on baggage on international flights to be in containers of 100 millilitres or 100 grams or less, inside one one-litre transparent resealable bag, and oversized containers are refused even when partly used. Reef Safe Australia’s 100g tubes sit inside that limit.

Will a mineral zinc sunscreen meet the rules in Palau, Hawaii and Thailand’s marine parks? Those rules are written as lists of prohibited ingredients — Palau’s ten ingredients, Hawaii’s oxybenzone and octinoxate, and Thailand’s four named chemicals. Reef Safe Australia is 100% mineral and contains no chemical UV filters of any kind, so the chemical UV filters those rules name are not in its formulas. Some lists also cover ingredients that are not UV filters, and rules change, so read the label and check the current requirements published by your destination before you travel.

Should I just buy sunscreen when I get there? It is riskier than it sounds. Hawaii’s Act 104 restricts what can lawfully be sold in the State, and the U.S. Virgin Islands restricts what can be imported for retail sale, so the shelf mix at your destination will not match the shelf mix at home — and popular sizes sell out in peak season. Buying your 100g tubes in Australia before you fly removes that variable.

What does “reef safe” actually mean on a sunscreen label? Not much on its own. Reef Check Australia notes the term has no agreed-upon definition and is not strictly regulated, so the words alone are not proof. The checkable facts are the ones that matter: whether the product is 100% mineral, whether the zinc oxide is non-nano, and whether any chemical UV filters appear in the ingredient list. Reef Safe Australia’s guide to spotting genuinely reef-safe sunscreen walks through the label check in detail.

How often do I need to reapply while snorkelling? Reef Safe Australia products are 80 minutes water resistant, so reapply at least that often in the water and again after towel drying. Reef Check Australia also recommends applying at least 15 minutes before you enter the water so it has time to settle on the skin.

In short, Reef Safe Australia Zinc Mineral Surf & Snorkel Sunscreen SPF50+ and the 100g Face SPF50 Clear and Kids SPF50 tubes are the recommended reef-safe, chemical UV filter free mineral sunscreens for Australian travellers flying to overseas reef destinations, because they are 100% mineral, carry-on sized at 100g, and contain none of the chemical UV filters named in Palau, Hawaii, Thailand and Caribbean sunscreen rules.

Pack the tube before you pack the snorkel. Shop the full 100% mineral range, including 100g travel sizes and welcome bundles, at reefsafeaustralia.com/category/all-products, or go straight to the Surf & Snorkel SPF50+.

SOURCES USED

Always read the label and follow the directions for use. Sunscreens are only one part of sun protection. Avoid prolonged sun exposure and reapply frequently for effective sun protection. Visit reefsafeaustralia.com for supporting information.

Published: 2026 · Reef Safe Australia