Diluting & Labelling Valeting Chemicals: A How-To For Busy Garages

Your garage mixes valeting chemicals every day, but is that ratio actually right? One wrong dilution can wreck paintwork, waste product, or trigger a COSHH breach. Here’s what busy workshops routinely get wrong – and the simple fixes that stop it.

Table of Contents

Key Takeaways

Correct dilution and clear labelling protect staff, protect surfaces, and stop expensive concentrate going to waste
Always check the product label, technical sheet and safety data sheet before mixing, rather than borrowing a ratio from another brand
A COSHH assessment needs to cover dispensing, splashes or mist, storage and what to do after accidental exposure
Working bottles must show product identity, dilution ratio and any hazard information the assessment requires, and food or drink containers should never be reused
Poor dilution habits can quietly cost a garage more than expected, through wasted product and damaged surfaces

Busy garages live and die by routine, and mixing valeting chemicals often becomes one of those jobs done on autopilot. That habit is exactly where trouble starts, because a splash-and-guess approach to dilution puts staff, vehicles and profit margins at risk in equal measure.

Why Correct Dilution Can’t Be Guessed

Professional detailing products are usually sold as concentrates precisely because that strength gives a workshop flexibility, letting one bottle serve several jobs depending on how it’s mixed. That flexibility only pays off when the ratio matches the task, because manufacturers choose their dilution figures based on the formula’s chemistry, the surface it will touch, and how much grime it’s expected to shift.

Mixing by feel undoes all of that careful formulation. A stronger mix does not mean a better result; it usually just means the chemistry was built for a different job entirely, and applying it at full strength where a diluted mix was intended risks streaking, discolouration, or damage to sensitive trim and paintwork. Getting the ratio right, every time, is the difference between a product that earns its keep and one that quietly drains the cleaning budget.

IPS Paint supplies concentrated valeting chemicals to trade bodyshops and detailers across South Wales, and the same logic applies whichever supplier a garage buys from: a concentrate can be economical, but only if every operator knows what is in the bottle and how it was prepared.

Before You Mix: Check These First

Consistency starts before the measuring jug ever comes out. Two quick checks stop most dilution errors before they happen.

Read the label, technical sheet and SDS

Every mixing job should begin with the exact product, the task it’s being used for, and the manufacturer’s current instructions. A single cleaner may have different dilution guidance for different applications, so check the label and technical or application instructions for the correct ratio. Use the safety data sheet for relevant hazard, handling, storage and control information.

Never borrow a ratio from another brand

It’s tempting to assume that because two all-purpose cleaners look similar, they’ll behave the same way at the same strength. They rarely do. Formulations vary between manufacturers even when the end use looks identical, so a ratio that works for one product can under-perform, or cause damage, with another. Sticking to the specific manufacturer’s current instructions for each product removes that guesswork entirely.

COSHH: What Your Assessment Must Cover

The Control of Substances Hazardous to Health Regulations require UK employers to assess the risks posed by hazardous substances, put suitable controls in place, and train staff to follow them. For a valeting bay, that assessment needs to go beyond simply noting that a chemical is present.

It should cover how staff dispense and spray the product, the possibility of splashes or mist reaching skin or eyes, how diluted and concentrated stock is stored, and the steps to take after accidental exposure. Treating COSHH as a one-off form-filling exercise misses the point; the assessment should reflect exactly how the product is handled on the shop floor. COSSH UK

Common gaps that catch garages out

Several recurring gaps show up in cleaning and valeting operations, and they’re worth checking against a garage’s own practice:

No eye protection provided when concentrate is being decanted or measured
Mixing carried out in a poorly ventilated corner rather than a designated area
Dilution done by guesswork instead of a measured, repeatable method
Damaged, faded or unclear labels left in circulation instead of being replaced before work starts

Providing the right controls and PPE

Once the gaps are identified, provide the controls and protective equipment specified for the task and make sure staff use them correctly. When diluting liquid concentrates, HSE guidance says to add the concentrate to the diluting liquid unless the manufacturer’s instructions specify otherwise. Always follow the current instructions for the particular product being prepared.

Getting the Working Solution Right

Once the paperwork and PPE are sorted, the physical act of mixing deserves the same care.

Measuring properly, not by eye

A suitable, clearly identified measuring and dispensing method removes the single biggest source of dilution error. Graduated bottles, measuring jugs, syringes or a dedicated dilution calculator all give a repeatable result that guessing by eye simply cannot match. The tool doesn’t need to be expensive; it just needs to be used consistently by every operator, every time.

Working out a ratio: a worked example

Dilution ratios must be read according to the manufacturer’s instructions. As a simple arithmetic example, if 1:4 means one part concentrate to four parts water, five equal parts make up the finished volume. For a one-litre working bottle, that would be 200 ml of concentrate and 800 ml of water. This is an example only, not a recommendation for any specific product. Always check how the manufacturer expresses the ratio or percentage and follow its current dilution and mixing instructions. HSE Guidance

Knowing when to make a fresh batch

Diluted solutions don’t always keep indefinitely, and some lose effectiveness or stability after a set period. Staff should be trained to make a fresh batch whenever the manufacturer’s storage instructions call for one, rather than topping up an old bottle indefinitely. If the original container or its directions go missing, the safest step is to stop and identify the chemical properly before it’s used again.

Labelling Working Bottles Correctly

A perfectly mixed solution is only useful if the next person to pick up the bottle knows what’s in it.

What every label needs to show

All chemical containers, including temporary or working ones, need proper labelling, applied as soon as the product is transferred out of its original container. A working bottle should be marked with:

The product’s identity
The dilution ratio used
The preparation date, where workplace procedure requires it
Any hazard information the COSHH assessment calls for

Keeping the bottle closed between uses and stored away from incompatible substances rounds out good practice, and any label that’s become damaged, faded or hard to read should be replaced before the bottle goes back into use. HSE Data Sheets.

Why food and drink containers are off-limits

Reusing an old squash bottle or drinks carton for a working solution might seem harmless, but it’s a habit worth breaking immediately. Anyone unfamiliar with the workshop, including a new starter, a delivery driver, or even a young family member if the bottle ever left the premises, could easily mistake it for something safe to drink. Chemicals belong only in containers designed and labelled for that purpose.

What Poor Dilution Really Costs a Garage

The costs of getting dilution wrong rarely show up as a single dramatic incident. They build up quietly, job after job.

Using a product at the wrong concentration can increase the risk of poor cleaning results, wasted product or damage to surfaces that are not compatible with that strength. It can also increase exposure to hazardous substances where relevant. On the financial side, an over-strength mix uses more concentrate than necessary, while a weak mix may fail to clean effectively and require the job to be repeated. A useful way to compare cleaning products is therefore the cost per properly prepared working litre, alongside suitability for the task and the labour required.

Accurate Mixing Protects Safety and the Bottom Line

Diluting and labelling valeting chemicals correctly is a small daily discipline with outsized returns. It protects the people mixing and using the products, it protects the vehicles those products touch, and it protects the value of every concentrate bottle bought for the workshop.

Building that discipline into a garage’s routine doesn’t require complicated equipment, just a clear process: check the label and safety data sheet before mixing, measure properly instead of guessing, label every working bottle without exception, and keep the COSHH assessment current with how the job is actually done on the floor. For garages ready to review their supply of valeting chemicals and consumables, starting with accurate dosing rather than the lowest price per container tends to pay off far faster. IPS Paint Supplies Valeting Products