Frequently Asked Questions

Interlock Singapore supplies and installs digital locks for main doors, metal gates, glass doors and sliding doors. Digital locks have been our core business since 2008. Every lock is installed by our own team, and we handle after-sales support locally.

Start with your door type (main door, metal gate, glass or sliding door), then pick the unlock methods your household will really use every day, then decide whether you need smart features like app control or a door viewer. Fit matters as much as features, so we check your door before recommending a model.

Browse main door locks, gate locks or compare the Interlock Mercury range.

Yes, that is our Free Fit Check. Send photos of your door, gate and existing lock area on WhatsApp. We check door thickness, lock cut-out, fire rating and gate clearance, then tell you what fits, what to avoid and your installed price before you pay anything.

If the recommended lock cannot be properly installed onsite and we cannot offer a suitable alternative, you will not be charged for the unsuccessful installation. Read the full Interlock Assurance.

Yes. WhatsApp us for a quick video walkthrough of the features, or arrange a 1-to-1 appointment to try the locks in person.

Our own Interlock Mercury range, plus Aqara, Gateman, Lockin, Solity and Samsung Zigbang.

Online checkout accepts Visa, Mastercard, Apple Pay, Google Pay and PayNow.

Yes, installation is free when you buy your lock from Interlock. GST and service charges are already included in the price, delivery is free and there are no hidden fees. It covers removing your old lock, fitting the new door or gate lock, setting up codes, fingerprints, faces and cards, Wi-Fi and app setup, and a full function test.

Usually $120 to $250, depending on the lock and your door or gate. Send photos of the lock and door on WhatsApp for an exact quote.

We fit and test the lock. For app, Wi-Fi or smart home features we will do our best to help, but we cannot guarantee setup on brands we do not carry, as every lock has its own app and guide.

Only if your door needs extra parts, and we tell you before we start. Examples are a metal rebate adapter for double-leaf doors, extra strike plates or faceplates, or a custom metal enclosure for some gate locks.

Most installations take about 1.5 to 2 hours, including fitting, testing and a walkthrough. Same-day or next-day slots are available whenever possible once we have confirmed your door is compatible.

Yes. Removing the old lock is part of the installation. If your door has unusual hardware, the installer will confirm what can stay and what needs replacing.

All areas in Singapore: HDB flats, condos, landed homes and commercial premises.

Yes, most HDB main doors take a digital lock. The right model depends on the door thickness, its existing lock position and whether the door is fire-rated. We check this from your photos first.

Many HDB main doors are fire-rated timber doors. They need a fire-rated digital lock so the door keeps its certification, and there are rules on where the door can be drilled. See our fire-rated digital locks.

Yes, with a lock made for gates. We also check the clearance between your gate and main door so the two handles do not collide. Browse digital gate locks.

Yes. Mercury door and gate bundles let one unlock open both. The Mercury G3 and G4 gate locks sync with the X2, X5 and X6 door locks. Lockin, Aqara and Solity bundles are also available. See door and gate bundles, from $999.

The Interlock Mercury GD1, Interlock ILG-02, Aqara U500 glass door lock, and the Gateman GR Clip, which clips on without drilling. See glass door locks.

The Interlock Mercury SD1 is built for sliding doors. The Gateman G-Touch also suits sliding doors. See sliding door locks.

Yes. Simple PIN and card locks such as the Gateman G-Touch are popular for rental rooms. See room door locks.

It depends on the model. Options include fingerprint, PIN code, card or tag, app, face recognition, palm vein, finger vein and a mechanical key. The Interlock Mercury X6 offers 7 ways to unlock.

No. Fingerprint, PIN, card and key work directly on the lock. Wi-Fi is only needed for app features like remote unlock and unlock history, and most smart locks need a 2.4GHz network. If you want no app at all, the Mercury X2 is fully offline.

Yes. You can add separate users and, on selected models, create scheduled or temporary PIN codes. The Mercury X6 also supports one-time PINs, useful for deliveries and short visits.

Yes, on app-connected models. The app shows who unlocked, when and by which method, and lets you unlock remotely once the lock is connected to Wi-Fi.

Aqara locks support Apple Home Key, and the Lockin V5 Max and S50M Pro work with Apple HomeKit.

Fingerprints can become hard to read as people age. Palm vein and face recognition, as on the Mercury X5 and X6, work even when fingerprints are worn. Cards and PIN codes are easy for children.

Many locks use 1.5V AA alkaline batteries, such as Energizer or Duracell. The Mercury X5, X6 and V6, and the Mercury gate locks, use a rechargeable pack. The Mercury X2 uses 4 AA batteries. Read our battery guide.

Mercury rechargeable packs last up to 4 months on the X5, X6 and V6, and up to 3 months on the G3 and G4. AA locks usually last 6 to 18 months at about 10 openings a day. As good practice, replace AA batteries every 6 months even without a low battery warning, because old batteries can leak.

Your lock warns you well before the battery runs out. If it does go flat, Mercury locks and many smart locks can be powered from a power bank through the USB-C port so you can unlock as normal. Many Korean locks take a 9V battery on the outside terminals instead (how to use a 9V battery). Models with a mechanical key can also be opened with the key.

Spare Interlock Mercury batteries start from $60, and we sell a 5V 2A charger with the Singapore Safety Mark.

Interlock Mercury locks come with a 1 year onsite warranty. Other brands vary, and the warranty is shown on each product page. See our warranty policy.

If an installation issue is caused by our workmanship within 30 days, we will come back and fix it at no extra workmanship charge.

Yes. We repair and replace digital locks from many brands, with next-day on-site visits across Singapore. Send a short video of the problem for a quick diagnosis. Some brands, such as Samsung, are discontinued, so parts are limited and replacement may be needed. See repair services.

• Your lock brand and model
• A short description of the problem
• A photo or short video of the lock
• Whether it is the door or gate lock
• Any recent change, such as new batteries or a new Wi-Fi router

Every day, 9am to 10pm. WhatsApp Alex on 9830 7788 for support, or Marlene on 8484 6924 for buying advice. Email: interlocksingapore@gmail.com.

• Bluetooth is on and the app has the permissions it asks for
• You are standing close to the lock
• Your Wi-Fi is 2.4GHz, which most smart locks need
• Restart your phone and try again

Still stuck? Send us your model and what you have tried.

Re-enrol the finger carefully, enrol the same finger twice at different angles if your lock allows it, and keep the sensor clean and dry. More fingerprint fixes.

This is usually door alignment or the bolt catching the strike, not the electronics. Do not force the door. Read what to check, or send us a short video.

• Set up at least two unlock methods, such as fingerprint and PIN
• Keep a power bank handy if your lock has USB-C emergency power
• Replace or charge batteries as soon as the low battery alert appears
• Make sure one trusted person also has access

Yes. We install digital locks for offices, clinics, tuition centres, retail spaces and shared offices. See commercial solutions.

Yes. Send the door types, quantity and preferred unlock methods, and we will recommend models and an installation plan.

Yes. See our group buy page for current group buy offers.