New furniture off-gasses hardest in its first few months — the adhesives and composite board are fresh, and a closed wardrobe or drawer traps everything inside. A formaldehyde remover spray lets you treat it yourself in an afternoon. Here is how to do it properly so the chemistry actually reaches the formaldehyde.

Before you start

Open the windows and switch on a fan — ventilation does half the work. Empty the piece so you can reach every interior surface, and wipe off any dust so the spray lands on the board, not on grime. Keep the bottle handy; one 500ml bottle covers roughly 15–20 m², enough for the furniture in a typical room.

Step by step

  1. Shake the bottle well.
  2. Spray evenly from 20–30 cm away, until the surface is lightly and fully covered.
  3. Do the insides first — the backs of doors, drawer interiors, shelves and the underside of cabinets.
  4. Let it dry naturally; it is touch-dry in about 30 minutes.
  5. For a strong smell, give it a second coat after 30 minutes.
  6. Leave the surface alone for 3–5 days before wiping or cleaning it.

The spots that matter most

Don’t just spray the faces you can see. Built-in wardrobes, kitchen carcasses and drawer boxes are where most of the formaldehyde sits, because the cut edges of the board are exposed and the enclosed space concentrates it. Open everything up and treat the insides — that is where a spray earns its keep.

How often to repeat

One thorough treatment handles most new pieces. If you bought a lot of carpentry at once — a full BTO fit-out, say — it is worth re-checking the worst wardrobes a few weeks later and re-treating if the smell is still sharp. Our DIY guide for a new HDB/BTO flat walks through doing a whole unit before you move in.

The spray here is the UCOATE formaldehyde remover spray — water-based, OECD 420 non-toxic, and the same chemistry that removed 93.83% of formaldehyde in SGS testing. You can buy the 500ml bottle on Shopee.