Last updated: 11 April 2026
Cloudy, frosted patches on your glass that no amount of scrubbing will fix? You are likely dealing with acid etching — a form of chemical damage that has permanently altered the glass surface. Before you spend thousands on panel replacement, know this: Lion City Glass restores acid-etched and chemically stained glass across Singapore, saving you up to 70% compared to full glass replacement. We bring your glass back to optical clarity using precision diamond polishing techniques — no panel removal, no downtime, no mess.
What Is Acid Etching on Glass?
Acid etching occurs when acidic or alkaline chemicals react with the silicon dioxide structure of glass, physically altering the surface at a molecular level. Unlike hard water stains that sit on top of the glass as mineral deposits, acid etching changes the glass itself — creating a rough, frosted, or cloudy texture that cannot be wiped or dissolved away.
This is one of the most misdiagnosed glass problems in Singapore. Homeowners and property managers frequently mistake acid etch damage for dirt, mineral buildup, or a defective glass panel. The key difference is that acid etching is a chemical change to the glass surface, not a surface coating. Standard cleaning — even professional window cleaning — cannot remove it.
Common Causes of Acid Etch Damage in Singapore
Singapore’s construction-heavy environment and tropical climate make acid etching a surprisingly common problem. Here are the most frequent causes we encounter:
Renovation and Construction Chemicals
This is the number one cause of acid etch damage in Singapore. During renovation work, tiling contractors use hydrochloric acid (also called muriatic acid or “tiling acid”) to clean grout haze from tiles. When this acid comes into contact with glass — whether splashed, dripped, or carried by cleaning water — it reacts with the glass surface within minutes. Cement slurry, lime wash, and alkaline cleaning agents used in post-renovation cleaning can also cause etching when left on glass surfaces for extended periods.
Pool and Spa Chemical Exposure
Swimming pool water in Singapore condominiums and landed properties contains chlorine, pH adjusters, algaecides, and stabilisers. When pool water splashes onto nearby glass panels — balcony barriers, pool fencing, or sliding doors — and dries repeatedly, the concentrated chemicals gradually etch the glass surface. This is especially common in condominium developments where pool areas are adjacent to glass-heavy common areas.
Aggressive Cleaning Products
Bathroom cleaners containing hydrofluoric acid, phosphoric acid, or strong alkaline compounds can etch glass on contact. In Singapore, many homeowners use industrial-strength cleaners on shower screens without realising the damage they cause. Even some “glass-safe” products can etch certain coated glass types.
Industrial and Environmental Exposure
Facade glass on commercial buildings can suffer acid etching from industrial fallout, acid rain, and chemical cleaning agents used during building maintenance. Singapore’s proximity to regional industrial activity and its humid tropical climate accelerate these chemical reactions on facade glass surfaces.
Our Acid Etch Removal Process
Acid etch correction is one of the most technically demanding glass restoration procedures. Unlike simple scratch removal or mineral deposit cleaning, it requires levelling the chemically altered glass surface back to optical clarity without causing distortion or removing excessive glass material. Here is how our glass polishing specialists handle it:
- Chemical identification — We determine the type of acid or chemical that caused the damage, as this affects the etch pattern and depth
- Etch depth assessment — Using specialist equipment, we evaluate how deeply the chemical reaction has penetrated the glass surface
- Surface preparation — The glass is cleaned and the work area is protected to prevent secondary damage
- Diamond compound polishing — We use progressively finer diamond abrasive compounds to carefully level the etched surface back to a smooth plane
- Cerium oxide finishing — A final polishing stage using cerium oxide compound restores full optical clarity and transparency
- Distortion check — Every restored panel is checked for optical distortion, waves, or hazing to ensure the glass looks perfectly clear
- Protective coating — We recommend applying a nano hydrophobic glass coating after correction to protect the restored surface from future chemical exposure
The entire process is performed on-site — your glass panels stay in place. Most residential jobs are completed within a single visit.
Residential Acid Etch Removal
Shower Screen Acid Etch Correction
The most common residential acid etch job in Singapore is shower screen restoration after renovation damage. Tiling acid used during bathroom renovation splashes onto shower glass and creates permanent cloudy patches that no amount of cleaning will remove. Many homeowners discover this damage only after the renovation contractor has left, and are quoted SGD 800–1,500 for a full shower screen replacement.
Lion City Glass corrects acid-etched shower screens on-site, typically restoring full clarity in 60–90 minutes at a fraction of replacement cost. We regularly service HDB flats, condominiums, and landed properties across Singapore.
Balcony and Window Glass
Balcony glass panels and window glass can suffer acid etching from construction chemicals during nearby renovation work, pool chemical splash, or aggressive cleaning products. We restore balcony panels and windows without removal, preserving the original installation and waterproofing.
Commercial Acid Etch Removal
Commercial properties require a different approach — larger surface areas, access challenges, and the need to minimise business disruption. Our commercial acid etch removal service covers:
- Retail shopfronts — Etching from cleaning chemicals or graffiti removal attempts
- Office lobbies and partitions — Chemical damage from construction or renovation activity
- Hotel glass — Pool-adjacent glass, bathroom screens, and facade panels
- Condominium common areas — Pool fencing, lobby glass, and corridor panels managed by MCSTs
- Industrial facilities — Chemical exposure from manufacturing processes
We provide detailed quotations for commercial projects and can schedule work during off-peak hours to minimise disruption. For large-scale projects, see our facade glass restoration service.
Acid Etch Removal Pricing
Pricing depends on the severity of the etch damage, the size of the affected area, and accessibility. Here are indicative starting prices:
- Light chemical staining — from SGD 200 per panel
- Moderate acid etch (shower screens) — from SGD 250 per screen
- Severe acid etch requiring deep polishing — from SGD 350 per panel
- Commercial projects — custom quotation based on scope
Compare this to glass panel replacement, which typically costs SGD 800–2,000+ per panel including frame work and installation. Restoration saves you 50–70% in most cases. For a full breakdown of our pricing across all services, visit our glass restoration pricing page.
Why Choose Lion City Glass for Acid Etch Removal
- Specialist expertise — Acid etch correction is one of the most technically demanding glass restoration procedures. Our technicians are specifically trained in chemical damage assessment and diamond compound polishing
- Restore, not replace — We save your existing glass panels, avoiding the cost, waste, and disruption of full replacement. Learn more about glass restoration vs replacement
- On-site service — All work is done at your location. No panel removal, no transport, no reinstallation
- Transparent pricing — We assess and quote before any work begins. No hidden charges
- Protective aftercare — Optional nano coating to protect restored glass from future damage
- Singapore-wide coverage — We service all areas including HDB estates, condominiums, landed properties, and commercial buildings island-wide
Frequently Asked Questions
Can all acid etch damage be repaired?
Mild to moderate acid etching can usually be fully corrected through professional diamond compound polishing. Severe etching that has deeply penetrated the glass (typically from prolonged hydrofluoric acid exposure) may not be fully restorable and could require panel replacement. We always perform a thorough assessment before recommending a course of action — if restoration is not viable, we will tell you upfront.
How is acid etch damage different from hard water stains?
Hard water stains are mineral deposits (calcium and magnesium carbonate) sitting on top of the glass surface — they can be dissolved and removed with the right chemical treatment. Acid etching has chemically altered the glass surface itself, creating physical roughness that requires mechanical polishing to correct. The two problems look similar but require completely different treatment approaches.
Can you repair acid-etched tempered glass?
Yes, in most cases. Tempered (toughened) glass can be polished, but requires extra care to avoid compromising the compression layer that gives tempered glass its strength. Our technicians are trained specifically in tempered glass polishing techniques and use controlled polishing depths to ensure structural integrity is maintained.
How long does acid etch removal take?
A single shower screen typically takes 60–90 minutes. Larger panels or severely etched glass may take 2–3 hours per panel. We provide a time estimate during the assessment so you can plan accordingly.
Will the glass look perfectly clear after treatment?
For mild to moderate etching, yes — the glass is restored to full optical clarity with no visible traces of the original damage. Severe etching may result in slight residual marks in certain lighting conditions, but the improvement is dramatic compared to the original damage.
How can I prevent acid etch damage during renovation?
The best prevention is to ensure all glass surfaces are covered with protective film or plastic sheeting before any tiling or chemical cleaning work begins. Instruct your renovation contractor to avoid using hydrochloric acid near glass surfaces. If acid contact does occur, flush the glass with water immediately — damage worsens with exposure time. For more tips, read our glass restoration guide.
Do you offer a warranty on acid etch removal?
We guarantee the quality of our polishing work. If the etching recurs due to our treatment (which is extremely rare), we will re-treat the affected area at no charge. Note that new chemical exposure after our treatment is not covered — which is why we strongly recommend applying a protective nano coating after restoration.
Is it worth restoring or should I just replace the glass?
In most cases, restoration is significantly more cost-effective. A typical shower screen replacement costs SGD 800–1,500 including frame work, while restoration starts from SGD 200. Restoration also avoids the disruption of panel removal and reinstallation. We only recommend replacement when the damage is too severe for polishing to achieve an acceptable result. Read our detailed comparison of glass restoration vs replacement to help you decide.
Get a Free Acid Etch Assessment — Contact Us Today
Not sure if your glass damage is acid etching or something else? Send us a photo via WhatsApp and we will identify the problem and advise on the best solution — no obligation, no charge.
Call or WhatsApp: +65 9669 3006
Email: enquiry@lioncityglass.com.sg
Service area: All of Singapore — HDB, condo, landed, commercial
We respond to all enquiries within 2 hours during business hours. For urgent chemical damage, call us directly for same-day assessment availability.