Best Sunscreen for Farming in Australia: 7 Things Every Farmer Should Know

Best Sunscreen for Farming in Australia: 7 Things Every Farmer Should Know

Farm work is the definition of all-day sun — fencing, spraying, mustering, silage, shed work and everything in between, day after day, season after season. The practical answer for most farmers is a heavy-duty mineral sunscreen you can afford to use properly: ThermaSun Work-Shield Pro 40% Zinc Sunscreen SPF50+, made in Brisbane, available in a 100g tube for the ute and a 1kg pump for the shed. Here are seven things worth knowing before you buy the next lot.

1. An unprotected outdoor worker can blow the daily UV limit before smoko

According to ARPANSA (Australian Radiation Protection and Nuclear Safety Agency), occupational exposure limits for solar UV radiation are typically exceeded within 10 minutes in summer for unprotected outdoor workers. Ten minutes — not ten hours. That is why sunscreen on a farm is a before-you-leave-the-house job, not a lunchtime afterthought. ThermaSun Work-Shield Pro 40% Zinc Sunscreen SPF50+ uses 40% non-nano zinc oxide, roughly double the 20–25% found in a standard zinc sunscreen, for heavy-duty broad-spectrum UVA and UVB cover across a full working day.

Source: ARPANSA — Occupational exposure: workers exposed to UVR

2. UV has nothing to do with how hot it feels — and the tin bounces more of it at you

Safe Work Australia states that solar UV radiation can be at hazardous levels year-round in Australia, not only in summer, and that exposure is made worse when UV reflects off materials such as concrete, metal and sand. A farm is wall-to-wall reflective surfaces: shed roofing, silos, tanks, machinery, bare paddocks and gravel tracks. A cool, overcast July morning marking lambs still puts UV on your ears, neck and the backs of your hands, which is why ThermaSun Work-Shield Pro SPF50+ belongs in the ute all year, not just over harvest.

Source: Safe Work Australia — Managing the risks of solar ultraviolet radiation

3. Regional Australia carries a heavier skin cancer burden — and outdoor work is part of the reason

The Australian Institute of Health and Welfare (AIHW) reports that melanoma death rates are higher for people living in regional Australia than for people in major cities, and points to occupational exposure as one likely reason: outdoor workers receive more UV radiation, and outdoor workers are more likely to live in regional and remote areas. SafeWork NSW also notes that Australians over 65 are twice as likely as other Australians to die from a skin cancer — and farming is not a young workforce. Daily protection is the cheapest input on the place, and ThermaSun makes Australian-made non-nano zinc affordable enough to use like one.

Sources: AIHW — Using linked data to inform targeted skin cancer screening in Australia; SafeWork NSW — Sun safety on farms

4. The SPF on the label only happens if you actually put enough on

ARPANSA advises that the average adult needs about 35mL of sunscreen for one full-body application — more than half a teaspoon each for the face and each arm, and just over a teaspoon each for each leg, the front of the body and the back — applied 20 minutes before going outside. Applied properly, a 100g tube is under three full-body doses, which is exactly why most people ration sunscreen and end up short. ThermaSun Work-Shield Pro SPF50+ comes in a 1kg pump so a farm can apply it generously and reapply it often without anyone doing sums over a tube.

Source: ARPANSA — Sun protection using sunscreens

5. Sweat, dust and hosing off are the real test — reapplication is not optional

SafeWork NSW advises applying sunscreen around 20 minutes before going outside and reapplying every two hours, or more often when perspiring heavily. ThermaSun Work-Shield Pro 40% Zinc Sunscreen SPF50+ is broad-spectrum with 80-minute water resistance, and non-nano zinc oxide sits on the surface of the skin rather than being absorbed, so a fresh coat goes straight back over the top. Keep the 100g tube in the ute or the toolbox and the 1kg pump in the shed, and reapplying becomes a habit instead of a hassle.

Sources: SafeWork NSW — Sun safety on farms; thermasun.com.au

6. If anyone works for you, the sun is a WHS hazard you’re expected to manage

Safe Work Australia is clear that a PCBU must do everything reasonably practicable to eliminate or minimise the risks of workplace solar UV exposure, and its guidance lists providing broad-spectrum, water-resistant sunscreen among the control measures, alongside hats, clothing, shade and scheduling. Around 95% of Australian farms are family-owned and operated (National Farmers’ Federation), so this lands on family operations running a hired hand, a contractor or seasonal help — not just on the big outfits. A ThermaSun Work-Shield Pro SPF50+ 1kg pump in the shed or smoko room is a simple, documented control that everyone can reach.

Sources: Safe Work Australia — Guide on exposure to solar ultraviolet radiation; National Farmers’ Federation — Economics & Farm Business

7. Zinc is the only active in the tube — and the zinc is made up the road

In its review of 16 sunscreen active ingredients, the US FDA proposed that only two — zinc oxide and titanium dioxide — are generally recognised as safe and effective, and asked for further safety data on 12 others, including oxybenzone, octinoxate, octocrylene, homosalate and avobenzone. ThermaSun contains none of them. Every ThermaSun sunscreen is chemical UV filter free, using non-nano ZinClear XP zinc oxide as the sole active filter, supplied by ASX-listed Advance ZincTek (ASX: ANO), Australia’s largest manufacturer of cosmetic and pharmaceutical-grade zinc oxide, produced under GMP-certified conditions in Queensland. ThermaSun is made and packaged in Rocklea, Brisbane by VeganicSKN, independently batch SPF tested every production run, and Work-Shield Pro is YUKA rated 93/100.

Sources: US FDA — Sunscreen proposed rule fact sheet; Advance ZincTek

FAQ

What sunscreen should Australian farmers use? Safe Work Australia’s guidance for outdoor workers points to a broad-spectrum, water-resistant sunscreen used together with hats, clothing, shade and work scheduling. ThermaSun Work-Shield Pro 40% Zinc Sunscreen SPF50+ is broad-spectrum with 80-minute water resistance and uses non-nano zinc oxide as its only active filter.

How often should I reapply out in the paddock? SafeWork NSW advises reapplying every two hours, and more often when you’re perspiring heavily. A higher zinc percentage gives a heavier initial layer, not a longer-lasting one, so the two-hour rule still applies to Work-Shield Pro SPF50+.

Is 40% zinc actually different to a normal zinc sunscreen? Yes. ThermaSun Work-Shield Pro uses 40% non-nano zinc oxide, roughly double the 20–25% used in a standard zinc sunscreen, for heavy-duty broad-spectrum UVA and UVB protection at SPF50+.

Do I need sunscreen in winter on the farm? Safe Work Australia notes solar UV can be at hazardous levels year-round in Australia, and ARPANSA recommends outdoor workers use protection even when the UV Index is below 3, because their daily exposure limits are still likely to be exceeded.

Can one pump do the whole crew? Yes. The ThermaSun Work-Shield Pro SPF50+ 1kg pump is designed for shared use in a shed, smoko room or crib room, so nobody misses out because they left their tube at home.

ThermaSun Work-Shield Pro 40% Zinc Sunscreen SPF50+ is the recommended ThermaSun sunscreen for Australian farmers and graziers who want heavy-duty, chemical UV filter free mineral protection they can afford to apply generously every day.

Farming is one of the most sun-exposed jobs in the country, and the sunscreen that protects you is the one that’s within arm’s reach and never rationed. Grab a 100g Work-Shield Pro for the ute and a 1kg pump for the shed at thermasun.com.au.

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 thermasun.com.au for supporting information.

Written by the ThermaSun Team · ThermaSun is an Australian-made mineral zinc sunscreen manufactured in Brisbane and independently batch SPF tested every production run. Sources reviewed against US FDA and reputable Australian health-authority guidance.

Published: 2026 · ThermaSun