Specification
- 0-6mm Particle Size
- Exceeds BS 3247 1991
- Free flowing for easy spreading
- Prevents and Melts Snow and Ice build up
White salt is made from evaporated sea water and is ideal for schools, hospitals, hotels and office blocks.
Our white rock salt delivers a crisp, clean white finish for practical winter use with its pure granular marine salt that leaves no messy brown residue. Treated with an anti-caking agent, it flows freely for easy spreading and stays effective in storage. Perfect for:
- driveways
- pathways
- car parks
- steps and entrances
- school and commercial grounds
It quickly prevents and melts snow and ice build-up while providing good grip underfoot. Cleaner and more effective than traditional brown rock salt, this white rock salt offers a low-residue, reliable solution for keeping outdoor areas safe and accessible all winter.
White Rock Salt
Price range: £172.00 through £272.00 inc. VAT
| Quantity | 20 x 20kg Bags, 40 x 20kg Bags |
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Brown Rock Salt
Price range: £138.00 through £202.00 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page
Specifications, Inspirational Ideas & DIY Guides
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Why Professionals & Homeowners Choose, Applications, Maintenance, Purchasing Tips, FAQs, Related Products
Overview
Every winter someone asks me why our white rock salt looks nothing like the brown stuff the council spreads, and the answer is that it is not the same material. Brown rock salt is halite, mined in Cheshire, Cleveland and County Antrim, and it comes out around 94% salt, the balance being the reddish marl that gives it both its colour and its grit. White rock salt is marine salt, evaporated from sea water in hot countries like Spain and Egypt, and it lands here at over 99% sodium chloride. Ours is graded 0 to 6mm and treated with an anti-caking agent so it pours instead of setting solid in the bag. It goes down bright white and dissolves away to nothing, which is the whole reason anyone pays the premium.
Why Professionals & Homeowners Choose White Rock Salt
There are four or five reasons to spend more on white, and they are all about what happens after the ice has gone.
- Being over 99% pure salt, it dissolves completely and leaves no brown sludge to be walked into a reception area or a hallway carpet.
- It will not stain block paving, pale limestone or a light porch tile the way marl-heavy brown salt can over a long winter.
- The 0 to 6mm grading is fine and free flowing, so it feeds through a hand or walk-behind spreader without bridging.
- It melts ice at the same rate as brown and goes down at the same spread rates, so cleanliness costs you no performance.
- The limitation, and it is a real one, is that you cannot see where you have already been. White salt on white frost is invisible, and people double-treat one bay and miss the next. For a large open yard spread by hand, brown is easier to do evenly.
White Rock Salt Applications
Applications here work in reverse. Salt is the one thing we sell that you want as far from your planting as possible, because sodium accumulates in soil, competes with roots for water and breaks down soil structure. Keep it on hard surfaces, never shovel salted snow onto a lawn or border, and edge a salted drive with something that shrugs off salt spray such as sea thrift (Armeria maritima) or Griselinia littoralis. A path with plants in the joints should not get salted at all.
- School, hospital and care home entrances, where the route runs from car park to carpet.
- Retail and hotel frontages and office approaches, where a customer forms a first impression at the door.
- Block paved and pale stone driveways that brown salt would stain over a season.
- Concrete and tarmac paths, steps and fire escapes, treated before the frost rather than after.
- Yards serving food or clean-room premises, where carried-in grit is contamination as well as a mess.
- Salt does little on loose gravel or bark, since ice doesn’t bond to a surface that moves underfoot.
White Rock Salt Maintenance
Salt looks indestructible but it is not, because it pulls moisture straight out of the air. Keep bags on a pallet under cover and unopened 20kg sacks hold their condition from one winter to the next; open bags want a lidded bin.
On the ground, re-treat after every rain event, because rain washes salt off long before the temperature drops. Salt put down while the surface is still dry and above freezing does far more work than the same salt thrown onto ice that has already formed. Salt accelerates freeze-thaw scaling on concrete and corrodes reinforcement, so a slab that has taken four heavy winters is worth a proper look each March.
Purchasing Tips
Work out the area, then the rate. Stopping frost forming takes 10 to 15 grams per square metre; once snow or ice is down, go to 20 to 40. One 20kg bag therefore covers roughly 1,300 to 2,000 m² of frost prevention, or 500 to 1,000 m² in snow.
Those numbers are why I want to be straight about pack size. The smallest white order is 20 x 20kg bags, so 400kg. On a 2,000 m² car park at snow rates that is ten full treatments, about right for a commercial site over one winter. On a typical 40 m² domestic drive it is roughly 660 treatments, which is several lifetimes. If that is you, buy a tub from a shed and save your money. This is a product for schools, estates, grounds contractors, farms and businesses, or for neighbours buying together.
Order in early autumn rather than the week of the first forecast, because the whole country usually wants salt on the same day and it stores perfectly well. For a bulk bag rather than sacks, that is brown rock salt only at the moment.
If you would rather talk your white rock salt order through with a person, ring Outdoor Aggregates on 0330 043 7585. The office is open 7am to 7pm, seven days a week.
White Rock Salt FAQs
What is white rock salt made of?
White rock salt is marine salt, evaporated from sea water in hot climates rather than mined, which is why it arrives at over 99% sodium chloride. Strictly it is not rock salt at all, since that means mined halite.
What size is white rock salt?
White rock salt from us is graded 0 to 6mm, a fine free-flowing grade with an anti-caking agent added. That suits hand scoops and walk-behind spreaders, and covers more evenly than the 10mm grade used on trunk roads.
Is white rock salt better than brown rock salt?
White rock salt is cleaner rather than stronger. Both melt ice at the same rate on the same spread rates; white leaves no residue or staining, brown is cheaper and adds grip from its insoluble marl.
How much white rock salt do I need per square metre?
White rock salt goes down at 10 to 15 grams per square metre to stop frost forming, rising to 20 to 40 grams once snow or ice is on the ground. One 20kg bag treats roughly 1,300 to 2,000 m².
Does white rock salt damage plants, paving or pets?
White rock salt damages plants and soil wherever the meltwater drains, accelerates freeze-thaw scaling on concrete, and irritates dogs' paws. Keep it to hard surfaces, spread thinly, and rinse the dog's feet at the door.
At what temperature does white rock salt stop working?
White rock salt keeps working down to roughly minus 7°C in practice, and its output falls away fast before that. At minus 1°C a kilo of salt melts around 46 kilos of ice; at minus 7°C it manages about nine.
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Brown Rock Salt
Price range: £138.00 through £202.00 inc. VAT -
White Rock Salt
Price range: £172.00 through £272.00 inc. VAT
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