Product and application illustrations. Follow the product label and written use guidance.
CleenU product solution
Hard Water Stain Remover
Clinging acid gel · Dissolves hard water scale · Private label
Cloudy shower doors and white spots that won't wipe off? Coat dry glass with gel, wait 3–5 minutes, scrub with a non-scratch sponge, rinse, squeegee, and buff for clear glass again. Factory-direct private label.
- Every shower leaves droplets that evaporate and leave their minerals behind as white spots. Layer after layer, plus soap scum, and the door looks frosted no matter how much glass cleaner you use. It's mineral deposit, and it takes acid to dissolve.
- Shower doors and walls are vertical, so liquids run off before the acid can work and can drip onto marble below. A gel stays on the glass long enough and is far less likely to drip. After cleaning, squeegee daily and apply a glass water repellent, and buildup drops noticeably.
- MOQ
- 500 bottles
- Free samples
- Free samples in 3–5 days
- Bulk lead time
- Scheduled with the order after packaging and labels are approved
Product value
What glass is it for?
CleenU Hard Water Stain Remover clears white water spots from glass shower doors, panels, and mirrors.
View product detailsProduct summary
- Product type
- Acidic gel hard water stain remover for glass
- Core use
- White water spots, mineral scale, and soap film on shower doors, glass panels, mirrors, and stainless sinks
- Formula focus
- Lactic and citric acid with thickener and low-foam surfactants, pH 1.5–2.5; ready-to-use gel, rinses off.
- Best for
- Home cleaning brands, Bath and building-supply channels, Janitorial and property buyers, Ecommerce sellers
Before & after
Before and after (illustration)
Before: a shower door after three years of hard water is covered in white spots on the lower half and looks frosted. After: coated, left 4 minutes, scrubbed, rinsed, and squeegeed, the glass is clear and the spots are essentially gone.
- Before: white spots, frosted lower half
- After gel, scrub, rinse: clear glass
- Spots essentially gone
How it works
How glass scale dissolves
Shower glass scale is mostly calcium and magnesium carbonate plus silicate deposits, often mixed with soap scum (calcium fatty acid salts). Hydrogen ions from lactic and citric acid dissolve the carbonates and citrate chelates the minerals, low-foam surfactants help disperse the scum, thickeners keep the gel on vertical glass longer, and sponge action plus rinsing carry it away.
- Coat dry glass with gel
- Acid dissolves carbonates
- Wait 3–5 minutes
- Scrub in circles
- Rinse, squeegee, buff
Usage guidance
Use guidance
- Coat dry glass with gel and wait 3–5 minutes.
- Scrub in circles with a non-scratch sponge; repeat for heavy buildup.
- Rinse, squeegee, and buff dry. Squeegee daily afterward and consider a glass water repellent.
Before you use it
Important notes
- Not for: Marble, limestone, other natural stone, and cement grout
- Not for: Brass and thinly plated fixtures
- Not for: Mixing with chlorine cleaners
- Not for: Long skin contact without gloves
- Test first for special materials, special equipment, or sensitive scenarios.
Product comparison
How to choose a Hard Water Stain Remover
Use Hard Water Stain Remover for hard water spots on shower glass and mirrors, Shower Cleaner for routine shower cleaning, and Faucet & Sink Scale Remover for faucets and basins.
View product comparison
| Decision point | Hard Water Stain Remover | Regular glass cleaner |
|---|---|---|
| White water spots | Dissolved by acid | Won't come off |
| Cling on vertical glass | Gel stays put | Runs off |
| Soap film | Handled too | Limited |
| Stone floors | Gel rarely drips | No effect |
Where Hard Water Stain Remover stands out
The haze on glass is mineral buildup
Every shower leaves droplets that evaporate and leave their minerals behind as white spots. Layer after layer, plus soap scum, and the door looks frosted no matter how much glass cleaner you use. It's mineral deposit, and it takes acid to dissolve.
Why a gel
Shower doors and walls are vertical, so liquids run off before the acid can work and can drip onto marble below. A gel stays on the glass long enough and is far less likely to drip. After cleaning, squeegee daily and apply a glass water repellent, and buildup drops noticeably.
Who it's for, where it's used, and when not to use it
For
End-use scenarios
When not to use it
Product Specifications and Custom Options
Key product details and custom options for your project.
Product specifications
Product type, cleaning scope, and format.
| Product type | Acidic gel hard water stain remover for glass |
| Surfaces | Glass shower doors and panels, bathroom mirrors, and stainless sinks |
| Applications | Cloudy shower doors in hard-water areas, White spots on bathroom mirrors, Deep cleaning hotel and rental showers |
| Main soils | White water spots, mineral scale, and soap film on shower doors, glass panels, mirrors, and stainless sinks |
| How to use | Coat dry glass, wait 3–5 minutes, scrub, rinse, squeegee, buff |
| Not for / avoid | Marble, limestone, other natural stone, and cement grout; Brass and thinly plated fixtures; Mixing with chlorine cleaners; Long skin contact without gloves |
| Size & packaging | 500 mL gel trigger bottle |
| pH | pH 1.5–2.5 (25°C) |
| Scent | Unscented |
| Shelf life & storage | 24 months unopened; store sealed in a cool, dry, ventilated place away from heat, sun, and freezing |
B2B custom options
Private label, packaging, MOQ, samples, and delivery.
| OEM/ODM & private label | We run Hard Water Stain Remover private-label projects from positioning and samples to packaging, production, and delivery. |
| Packaging & labels | Gel spray or sponge-head bottle, acid strength, viscosity, labels, and kits available |
| Case pack | 12 × 500 mL per case |
| OEM/ODM and private label | Available for project discussion |
| Packaging and labels | Gel spray or sponge-head bottle, acid strength, viscosity, labels, and kits available |
| MOQ | 500 bottles |
| Sample time | Free samples in 3–5 days |
| Bulk lead time | Scheduled with the order after packaging and labels are approved |
| Documents | SDS/MSDS, TDS, and batch COA provided with quotes |
OEM/ODM project process
Move from product direction and sample review to packaging, production, and delivery for Hard Water Stain Remover.
Define the buyer and plan
Choose a gel spray or sponge-head bottle, whether to sell a remove-and-protect kit with glass repellent, and shower glass or car glass water spots.
Free samples
Free samples are usually ready in 3–5 days for project review.
Packaging and labels
Set acid strength, gel thickness, fill size, label language, and directions on natural stone, gloves, and chlorine.
Production and delivery
Standard MOQ is 500 bottles; production is scheduled after packaging and labels are approved.
Why choose CleenU for Hard Water Stain Remover?
From product positioning and samples to packaging and repeat supply, CleenU supports OEM/ODM projects built around Hard Water Stain Remover.
Adjustable gel thickness
We tune gel viscosity for dwell on vertical glass so it clings yet rinses easily.
Remove-and-protect program
Pairing the remover with a glass repellent determines how long glass stays clear.
Sample testing that means something
We plan sample evaluation around shower doors with years of hard water: gel cling time, passes needed, clarity, and effect on seals and fixtures.
Labels and documents ready
Bilingual label copy, SDS/MSDS, TDS, and batch COAs, with warnings and directions prepared for your target market.
Consistent reorders
Every batch is retained and issued a COA, so reorders match on color, scent, and feel.
Formula discussion
Discuss formula direction based on product positioning, target market, and channel selling points.
Packaging and labeling options
Plan packaging format, label language, and shelf presentation around Hard Water Stain Remover and your target channel.
Show packaging and label options
Packaging options
Main size: 500 mL gel trigger. Also available: sponge-head squeeze bottle, channel case packs, and ecommerce bundles with a glass repellent and squeegee, with labels and cartons in your branding.
Supporting Documents and Materials
Purchasers usually confirm whether the materials are complete before formal cooperation. Preparing documents in advance helps with quoting, sampling, and channel review.
Show available documents
Project documents
SDS/MSDS, TDS, batch COA, label directions, and packaging files are provided per project after inquiry.
Related products, solutions, and articles
Explore related cleaning products, application guidance, and OEM/ODM resources for Hard Water Stain Remover.
Frequently asked questions (FAQ)
Find practical answers about Hard Water Stain Remover, private label, samples, MOQ, documents, and delivery.
Product, use, and procurement
What are the white spots on my shower glass?
When water droplets evaporate, the calcium and magnesium stay behind as white spots. Over time they stack into a cloudy film, and soap scum makes it worse. It's mineral buildup, so it takes acid to dissolve it; regular glass cleaner won't.
Why a gel?
Shower doors and walls are vertical, so liquids run off before the acid can work. A gel clings to the glass long enough to dissolve the scale and doesn't drip onto stone floors.
How is this different from a tile descaler or faucet descaler?
Tile descalers are built for large wall areas, and faucet descalers for fixtures. This one targets hard water spots on glass shower doors, glass panels, and mirrors, with a gel thickness and dwell time designed for vertical glass.
What should we decide first for a private-label hard water stain remover?
Applicator, kit, and market. A gel spray or a squeeze bottle with a sponge head; whether to pair it with a glass water repellent (protection determines how long glass stays clear); and shower glass or car glass water spots, since they sell through different channels.
How fast can we get samples and a first order?
Free samples ship in 3–5 days. MOQ is 500 bottles, and production is scheduled once packaging and labels are approved.
What is a hard water stain remover, and when do I need one?
It's an acidic cleaner for the white mineral spots and cloudy film that regular glass cleaner leaves behind. Reach for it when a glass-cleaner wipe doesn't clear the haze. CleenU's version is a gel, so it clings to vertical shower glass long enough for the acid to dissolve calcium and magnesium deposits instead of running off.
Product usage questions
How do I use it?
Coat dry glass with gel, wait 3–5 minutes, scrub in circles with a non-scratch sponge, rinse, squeegee, and buff dry. Repeat for heavy buildup.
What shouldn't I use it on?
Marble, limestone, other natural stone, and cement grout are acid-sensitive, so keep drips off stone floors. Avoid brass and thinly plated fixtures too.
How do I keep the spots from coming back?
Squeegee the glass after every shower; no standing water, no scale. Apply a glass water repellent after cleaning so water beads off, and buildup drops noticeably.
Do I need gloves?
Yes. It's acidic, so wear gloves, ventilate the bathroom, and never mix it with chlorine cleaners.
Can I use it on the toilet waterline?
Yes. Lower the water level, apply gel, let it sit, and scrub; use toilet cleaner for heavy urine scale.
Does it work on hard water spots on car glass?
Test a small area of exterior glass and rinse well, keeping it off paint and rubber seals.
How often should I use it?
Weekly upkeep keeps scale from building up thick.
How do I remove stubborn hard water stains from shower glass?
Do two passes instead of scrubbing harder. Years of buildup form in layers, and each application mostly dissolves the top one. Coat dry glass with the gel, wait 3–5 minutes, scrub in circles with a non-scratch sponge, rinse, and squeegee; then repeat on what's left. Skip steel wool and razor scraping.
OEM/ODM customization questions
What can we customize?
Formula direction and acid strength, gel thickness, fill size (500 mL gel spray, sponge-head squeeze bottle, and more), label design and language, and kits with a glass water repellent and squeegee.
How should we test samples?
Test side-by-side sections of shower glass with years of hard water, and record gel cling time, number of passes, clarity afterward, and any effect on seals and fixtures. That tells you more than a before-and-after photo.
What paperwork comes with a private-label order?
Documents such as SDS/MSDS, TDS, COA, and label copy for your target market are prepared per project. We confirm which ones your order includes when we quote.
Launching your own hard water stain remover?
Send us your market, bottle style, remove-and-protect plans, and estimated volume. We'll build it out with you.