If you've ever washed a car and seen white spots appear after it dries, you've seen what dissolved minerals in tap water can do. Deionised (DI) water solves this problem — and it's especially important for glass facades and solar panels.
What is DI Water?
Deionised water has had its mineral ions (calcium, magnesium, sodium, etc.) removed through an ion exchange process. The result is water that leaves no mineral residue when it dries. This gives a spot-free, streak-free finish without the need for drying or buffing.
Why It Matters for Cleaning
Glass Facades
Tap water leaves mineral spots on glass that can be difficult to remove and look worse than the original dirt. DI water rinse eliminates this problem entirely.
Solar Panels
Mineral deposits from tap water can reduce light transmission through the panel glass, partially negating the benefit of cleaning. DI water preserves the anti-reflective coating and leaves panels truly clean.
Coated Surfaces
Some facade coatings and treatments can react with mineral-heavy water. DI water is chemically neutral and safe for virtually all building surface treatments.
Measuring Water Quality
Water purity is measured in TDS (Total Dissolved Solids), expressed in parts per million (ppm). Tap water in Indian cities typically runs 200–500 ppm. For facade and solar panel cleaning, we target below 10 ppm. We carry a TDS meter on every job to verify water quality before and during cleaning.
How We Manage DI Water
We produce DI water using portable ion exchange resin systems and transport it to site in our own tanks. This means we're not dependent on local water quality — the cleaning result is consistent regardless of location. Resin cartridges are monitored and replaced on a regular schedule.
← Back to Guides