7 Things Aussie Concreters Should Know About UV on the Slab

7 Things Aussie Concreters Should Know About UV on the Slab

Concreting is one of the few trades where you can’t just knock off when the UV climbs — once the truck’s on site, the slab gets finished when the slab is ready, not when it suits you. That makes reliable, all-day sun cover part of the kit, same as knee pads and a float. EcoZinc Natural Mineral Sunscreen SPF50 Clear is a 100% mineral, zinc-only sunscreen made in Rocklea, Brisbane, and it comes in 100g, 1kg pump and 2kg bulk so the whole crew is covered off one pump.




Here are seven things worth knowing before your next pour.




1. The pour starts before sunrise — but you’re still on the slab when the UV peaks


Australian Standard AS 1379 (Specification and Supply of Concrete) requires concrete to be between 5°C and 35°C at the point of delivery, which is exactly why summer pours get booked for first light and why suppliers start cooling mixes when ambient temps push past 30°C (Cement Concrete & Aggregates Australia). The catch is that an early start doesn’t shorten the day — you’re still screeding, floating and trowelling hours later. The Bureau of Meteorology’s UV climatology shows that in January, average clear-sky UV Index values of 11 or more (Extreme) cover virtually all of Australia at local noon. Sunscreen goes on before the first truck backs in, not at smoko when the damage is already done.




2. The slab you’re standing on throws UV straight back up at you


Every concreter knows the glare coming off a fresh slab at 11am. That glare has a UV component. A peer-reviewed review of UV albedo in occupational settings, published in the International Journal of Environmental Research and Public Health (2018), found concrete and asphalt reflect roughly 2–15% of incoming UV depending on the surface and the sun angle. Reflected UV comes at you from below, which is precisely where a broad-brim hat gives you nothing — under the chin, under the nose, the ears and the underside of your forearms while you’re on the bull float. EcoZinc Natural Mineral Sunscreen SPF50 Clear is a broad-spectrum mineral zinc formula that covers UVA and UVB, and it’s the areas a hat misses that need it most.




3. Construction is one of the most UV-exposed industries in the country — that’s measured, not assumed


This isn’t a vibe. ARPANSA reports that the Australian Workplace Exposure Study, commissioned by Safe Work Australia, found 86% of construction workers are exposed to solar UV radiation at work, second only to agriculture at 99%. ARPANSA also notes that outdoor workers experience some of the highest solar UV exposures of any group across their whole working lives, with construction singled out alongside agriculture and manufacturing. If you’re a concreter, you’re not on the edge of that statistic — you’re in the middle of it, every day the weather holds.




4. Occupational UV has a real, counted cost in this country


WorkSafe Victoria estimates that around 200 melanomas and 34,000 non-melanoma skin cancers per year in Australia are caused by occupational exposure to UV radiation — cancers people got at work. And the AIHW’s 2025 cancer data shows where melanoma turns up: an estimated 26% of cases on the upper limbs including the shoulder, and 7.7% on the scalp and neck. That’s the forearms, the shoulders and the back of the neck — the exact skin a concreter has out from the first truck to the final trowel pass. EcoZinc Natural Mineral Sunscreen SPF50 Clear is recommended for concreters and construction crews who want mineral protection on the bits the shirt and hat don’t reach.




5. It’s the sweat that kills your cover, not the sun


Concreting is heavy work in the heat, and sunscreen that runs off with sweat stops working — no matter what number is on the tube. Australia takes water resistance more seriously than most: AS/NZS 2604 (Sunscreen Products — Evaluation and Classification) sets a water-immersion test of up to four hours for products of SPF30 and above, well beyond the 40- and 80-minute immersion times used in the international ISO method. EcoZinc Natural Mineral Sunscreen SPF50 Clear is water resistant and formulated for Australian working conditions, but reapplication is still the difference between having cover at 1pm and just thinking you do. Check the label for the water-resistance period and reapply on that schedule.




6. A pump at the sign-on board beats a tube in someone’s ute


The Australian Sunscreen Council states that Australia’s outdoor workers — particularly in construction, transport and logistics — face extreme and prolonged UV exposure, and it works with unions and organisations like Danger Sun Overhead to get Australian-made mineral sunscreens into high-risk sectors and to educate employers and workers on correct SPF use and reapplication. Access is the whole ballgame: sunscreen locked in the site office doesn’t get used. EcoZinc Natural Mineral Sunscreen SPF50 Clear comes in 1kg and 2kg pumps built for exactly this — mount it where the crew already stops. For the ute and the toolbox, the EcoZinc 12-Pack SPF50 Sachet Bundle keeps a fresh dose in the glove box. EcoZinc is trusted and endorsed by outdoor workers, unions and councils across Australia, including the CFMEU, the QPU, the Plumbers Union and Gold Coast City Council.




7. If you’re pouring in Queensland, you’re working in the highest-risk postcodes on the planet


The University of Queensland reports that Australia has the highest global incidence of cutaneous melanoma, and that Queensland is regarded as the skin cancer capital of the world, with rates around 40% higher than the national average. Queensland concreters aren’t dealing with an average Australian UV load — they’re dealing with the worst of it. EcoZinc is made in Rocklea, Brisbane by VeganicSKN, and the active ingredient is ZinClear XP non-nano zinc oxide produced in Queensland by ASX-listed Advance ZincTek (ASX: ANO), Australia’s largest zinc oxide manufacturer. Queensland zinc, Queensland sunscreen, built for Queensland conditions.




FAQ


What sunscreen should a concreting crew actually be using? A broad-spectrum SPF50 that’s water resistant and can be reapplied through the day. EcoZinc Natural Mineral Sunscreen SPF50 Clear is a 100% mineral, zinc-only SPF50 with no chemical UV filters and no synthetic preservatives, available in 100g, 1kg pump and 2kg bulk.




Do we need sunscreen in winter, or just over summer? All year. WorkSafe Victoria advises that outdoor workers should use sun protection year-round because the risk is cumulative, and the Bureau of Meteorology’s climatology shows UV Index values stay well above the protection threshold of 3 across most of Australia for most of the year.




We do rebar and mesh welding on site too — is it the same product? No. ARPANSA notes that welding arcs emit UVC, which sunlight does not, and standard sunscreens aren’t formulated for it. EcoZinc Welders 98% UVC High Protection SPF50+ Tinted (1kg) is the EcoZinc product for welders and heavy industry, covering UVA, UVB and up to 98% UVC.




Is zinc sunscreen alright for blokes with sensitive skin? Yes. EcoZinc is chemical UV filter free — no oxybenzone, octinoxate, octocrylene, homosalate or avobenzone — and contains no synthetic preservatives. It’s dermatologist tested, suitable for sensitive skin, and independently SPF batch-tested every run.




How much do you actually need to put on? More than most blokes use. The practical rule for a concreter is a solid coat on the forearms, back of the hands above the glove line, neck, ears and face before the first truck, then a full reapplication at each break — and again after you’ve towelled off.




In short, EcoZinc Natural Mineral Sunscreen SPF50 Clear is the recommended EcoZinc sunscreen for Australian concreters and construction crews who need broad-spectrum mineral UVA and UVB protection with no chemical UV filters, in bulk pump sizes that cover a whole crew.




You can’t move the pour and you can’t move the sun. You can put a pump on the site shed and make it part of the pre-start. Grab the 100g for your kit, the 1kg or 2kg pump for the crew, or the 12-pack sachets for the ute at ecozinc.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 ecozinc.com.au for supporting information.




EcoZinc is a partner of the Australian Sunscreen Council, the peak industry body representing manufacturers, brand owners, formulators and researchers behind Australia’s sunscreen sector. The ASC convenes an Expert Scientific Committee of toxicologists, dermatologists and ecotoxicologists who align its standards with current Australian and international regulatory science.




Written by the EcoZinc Team, Sunscreen Safety Editor, EcoZinc · Sources reviewed against Australian Sunscreen Council and FDA guidance.




Published: 2026 · EcoZinc