Dilution Ratios Explained — Module 3
⭐ Free Taster Micro-Course. This module gives you a practical introduction to dilution ratios for cleaners. For full professional training with CPD certification, explore our paid courses.
What you'll learn in this module
- The risks of over-dilution and under-dilution
- The most common dilution mistakes cleaners make
- How to get dilution right every time on the job
The Risks of Getting It Wrong
Both over-diluting and under-diluting a chemical cause problems — just different ones.
- Under-dilution (too much chemical): Increases cost, can damage surfaces, leaves chemical residue, and poses a COSHH risk to you and building occupants. Strong concentrations of some chemicals can bleach fabrics, corrode metals, and irritate skin and airways.
- Over-dilution (too much water): The product may not work at all. Bacteria may survive. Soiling may not be removed. You end up using more product and more time to get the same result — costing you money.
Key point: The manufacturer's stated ratio is the sweet spot — effective, safe, and cost-efficient. Deviating in either direction costs you.
Common Dilution Mistakes
| Mistake | Why It Matters |
|---|---|
| Guessing the amount of chemical | Even experienced cleaners misjudge volumes without measuring. Use a measure every time. |
| Adding water to chemical | Always add chemical to water. Reversing this can cause splashing of concentrated product. |
| Using the same dilution for every task | Different tasks require different ratios. A sanitiser for food surfaces has a different ratio to a carpet pre-spray. |
| Not checking the label or SDS | Ratios vary between products even from the same manufacturer. Always check. |
| Topping up a part-used bottle without emptying it first | You lose track of the concentration. Empty, rinse, and mix fresh each time. |
Getting It Right Every Time
Use a measuring jug or dosing cap — never free-pour. Keep the reference table from Module 2 in your kit bag or on your cleaning trolley. If you are unsure of the ratio for a product, check the label or SDS before mixing. When in doubt, contact the manufacturer or supplier.
✅ You have completed Micro-Course 6: Dilution Ratios Explained
Well done — you now know how to read, calculate, and apply dilution ratios correctly and safely.
📋 Want to track your progress?
Create a free CCMTec account to track your learning and access your completion certificate.
Create a free CCMTec account to track your learning and access your completion certificate.
Disclaimer: This micro-course provides a general introduction to dilution ratios for cleaning chemicals. It is not a substitute for full professional training. Always follow manufacturer guidance and refer to current HSE guidance for your specific workplace.
Dilution Ratios Explained — Free Micro-Course | Version 1.0 — Reviewed May 2026 | CCMTec Cleaning & Janitorial Supplies