Short Answer:
Typically 2 to 3 hours, depending on the size and condition of your unit.
Long Answer:
The total time for a formaldehyde removal service depends on several key factors:

๐น 1. Size of the Unit
| Property Type | Estimated Time |
|---|---|
| Small room (e.g. bedroom) | 1 โ 1.5 hours |
| Condo/Apartment (700โ1200 sqft) | 2 โ 3 hours |
| Terrace / Semi-D House | 3 โ 4 hours |
| Large Bungalow / Office | 4+ hours |
Larger spaces or homes with multiple floors will naturally take longer due to more surface area and air volume.
๐น 2. Number of Rooms and Items
We donโt just spray the air โ we treat:
- Walls and ceilings
- Furniture (beds, wardrobes, shelves)
- Curtains, carpets, rugs
The more items and surfaces that absorb formaldehyde, the more treatment time is needed for full coverage and drying.
๐น 3. Ventilation and Environmental Factors
Rooms with good ventilation can speed up the waiting period between spray applications, while humid or enclosed spaces might require more time for proper absorption and drying.
๐น 4. Step-by-Step Breakdown of Our Process
- Initial Testing (15โ30 minutes)
Using a gas detector, we measure the existing formaldehyde level. - First Spray Application (30โ45 minutes)
We apply our neutralizing formula on all relevant surfaces. - Waiting/Reaction Time (45โ60 minutes)
Room is left untouched so the formula can break down airborne and surface-level formaldehyde. - Second Testing (10โ15 minutes)
We take another reading to assess improvement. - Second Spray + Final Reading (30โ45 minutes)
We apply the spray again and do a final check for air safety.

๐น 5. Do I Need to Leave the House During Treatment?
- Not necessarily.
You can stay in a different room during the process, but we recommend ventilating the treated space and avoiding close contact with sprayed surfaces until drying is complete. - After treatment, most homes are safe to re-enter fully after 1 to 2 hours of ventilation.
- If you’re doing post renovation cleaning with company like KILAT KILAT. Best to do it after cleaning process or 48 hours after cleaning.
Final Summary:
| Service Stage | Time Required |
|---|---|
| Total Treatment | ~2โ3 hours |
| Re-entry after service | 1โ2 hours |
| Full air refresh | Within the same day |
Still Have Questions?
Weโre always happy to walk you through the process based on your exact property type. Send us a WhatsApp message or visit sembo.com.my for a quick consultation.
