Damp patches and mould on the inside face of exterior walls are a common problem in air-conditioned rooms. Terraco makes a skimcoat for exactly this: Handycoat ACP. Short answer: Handycoat ACP is a lightweight, acrylic anti-condensation filler and skimming compound for interior walls, applied 2 to 5 mm thick. Terraco designs it for the inside faces of exterior walls where cold bridging causes condensation, and describes it as fungal resistant. It does not fix leaks or poor ventilation, so those come first. This guide is based on Terraco’s UAE technical data sheet.
Key facts
| Product type | Anti-condensation interior filler and skimming compound |
| Binder | Acrylic copolymer |
| Specific gravity | 1.09 (Terraco states 40% lighter than conventional skimcoats) |
| Layer thickness | 2 to 5 mm |
| Coverage | 2 to 3 kg/m² for 1.5 to 2.5 mm |
| Primer | Penetrating Primer on dusting surfaces |
| Before painting | Light sand, within 24 hours |
| Packs | 4 kg and 18 kg |
| Shelf life | 12 months, unopened |
Terraco lists these properties: anti-condensation, fungal resistant, lightweight, quick drying, low shrinkage, vapour permeable, does not flake off, and can be applied over previously painted surfaces.
Fix the cause first
A skimcoat treats the wall surface. If damp comes from a roof or pipe leak, rising moisture or a bathroom with no extract fan, repair that before skimming. Where mould has already grown, clean and treat it first; our guide to removing mould before painting covers the steps.
Handycoat ACP vs Handycoat Interior
| Handycoat ACP | Handycoat Interior | |
|---|---|---|
| Job | Anti-condensation skim on the inside of exterior walls | General filling and smoothing before paint |
| Thickness | 2 to 5 mm, built up in layers | Maximum 1 mm per coat |
| Coverage | 2 to 3 kg/m² | 0.2 to 0.4 kg/m² |
| Packs | 4 kg, 18 kg | 1 kg, 5 kg, 18 litre |
For ordinary repairs, Handycoat Interior is the lighter choice. For large areas, see Handyspray FC vs Handycoat Interior.
Where it can go
Terraco lists gypsum board, sand/cement render, cement fibre board, precast and in-situ concrete, and previously painted interior surfaces.
How to apply it
- Prepare. Scrape and brush the surface clean. Apply Penetrating Primer on dusting surfaces; see our Terraco primer guide.
- Apply in thin, even layers. Build thicker coats in several layers, letting each dry.
- Sand lightly before painting, within 24 hours.
- Clean tools with water.
How much you need
At 2 to 3 kg/m², an 18 kg container covers about 6 to 9 m² and a 4 kg pack about 1.3 to 2 m². A 12 m² bedroom wall needs 24 to 36 kg, so two 18 kg containers. These are our own calculations from Terraco’s coverage figure.
Frequently asked questions
Can it go over old paint?
Yes. Terraco lists previously painted interior surfaces, provided they are clean and sound.
Can I use it outside?
It is an interior product. For exterior filling, Terraco makes Handycoat Exterior; see our guide to filling exterior wall cracks.
Buying Handycoat ACP in Sharjah and Dubai
Al Tashteb Al Saree is an authorised Terraco distributor and supplies Handycoat ACP direct from the manufacturer. Message us on WhatsApp with the wall area. You can also browse every Terraco product we supply.
Sources
- Terraco UAE: Handycoat ACP technical data sheet (PDF, version 07.2013)
- Terraco UAE: Handycoat Interior Stucco Putty technical data sheet (PDF)
Retrieved 31 October and 1 November 2026. Quantities are our own calculations. The main image is illustrative.
