Hairline cracks and small dents on an exterior wall are easy to miss until the paint starts to show them. Filling them before you paint gives you a smoother surface to finish. Terraco Handycoat Exterior is a ready-mixed filler that the manufacturer describes as quick drying and made for exterior surfaces. This guide covers how to prepare the wall, apply the filler in thin layers and sand it. It also separates what the manufacturer’s data sheet says from what it leaves out.
Key takeaways
- Terraco describes Handycoat Exterior as a ready-mixed, quick-drying filler for exterior surfaces, used for filling joints and hairline cracks by hand.
- Apply it in thin layers. The data sheet sets a maximum layer thickness of 1 mm, so deeper repairs need several coats, with each one dried before the next.
- Clean the surface first. On old painted walls the sheet calls for a soda and water wash, a rinse and drying before you fill.
- Sand the dry final surface lightly, preferably within 9 hours of application, then paint.
- The sheet does not state drying times, number of coats or temperature limits. Check the current data sheet before a large job.
What Handycoat Exterior is for
The manufacturer’s data sheet describes Handycoat Exterior as a ready mixed, quick drying filler for exterior surfaces. It uses a styrene acrylate binder with precisely graded fillers, and it comes in 25 kg and 5 kg containers.
The product listing on our site adds that the filler suits both interior and exterior surfaces. It is designed for painters to repair and touch up surfaces, new and old, before painting. The listing names these jobs: hairline cracks in walls, ceilings and soffits, damaged plasterwork, holes and defects in woodwork, exposed concrete, and dents in galvanised and anti-rust primed metal.
Prepare the surface first
Preparation is short, and the data sheet is specific about it:
- Brush away dust, dirt and loose foreign matter.
- Remove ridges and form oil.
- On old painted surfaces, wash down with a soda and water solution, rinse, and let the surface dry before filling.
- If the surface is dusting or flaking, the sheet recommends a penetrating primer to stabilise it first.
For the full preparation sequence on a wall, see our checklist on how to prepare a wall before painting.
How to apply the filler
- Apply Handycoat Exterior by hand in a thin, even layer. The sheet gives a maximum layer thickness of 1 mm.
- For a deeper repair, build it up in several thin layers. The sheet does not give a drying time, so check that each layer is fully dry before you add the next.
- When the final layer is dry, sand it lightly. The sheet prefers that you do this within 9 hours of application.
- Paint once the surface is dry and sanded. The sheet does not name a paint system, so follow the topcoat maker’s instructions.
- Clean tools and equipment with water straight after use.
The sheet allows dilution with water if required. If you are also choosing the topcoat, our guide to the best exterior paint for UAE weather covers the options.
How much filler you need
The data sheet gives coverage of 0.5 to 1.5 kg per m², depending on substrate conditions. It does not say whether that figure is per coat or for the whole repair, so treat it as a planning range. As a rough guide, 10 m² of wall would need between 5 kg and 15 kg before waste. Pails come in 25 kg and 5 kg sizes.
Common mistakes the data sheet warns against
- Applying one thick coat. The sheet calls for thin layers, with a 1 mm maximum for each.
- Filling over dust, ridges or form oil without removing them first.
- Filling old painted walls without the soda and water wash.
- Leaving the sanding too late. The sheet prefers it within 9 hours.
- Storing containers in direct sunlight or in extreme heat or cold. The sheet asks for a clean, dry area.
Where Handycoat Exterior fits in the Terraco range
Terraco’s UAE products page groups its fillers and repair compounds under Surface Preparation and Repairs. The same group includes renders and mortars, gypsum board skimming and jointing compounds, concrete repair and protection, screeds, primers and bonding agents, and construction adhesives. Other Terraco categories cover façade finishes, interior coatings, waterproofing, surfacing and flooring, and tiling solutions.
Our Terraco range page lists the products we carry by category, including the interior Handycoat fillers and gypsum joint compound. For a job that needs something other than a filler, such as waterproofing or tile grout, start there. Then check each product’s own data sheet before you choose.
What the data sheet does not tell you
The leaflet we checked is Terraco’s general document for Handycoat Exterior. It does not give UAE-specific figures, and it does not state drying times, the number of coats, or temperature and humidity limits. Before a large job, ask for the current UAE data sheet. You can also call us with your question before you buy.
On safety, the sheet says to avoid prolonged contact with eyes and skin, and it refers to the safety data sheet (SDS) for details. Ask for the SDS before you start.
Frequently asked questions
Can Handycoat Exterior be used indoors?
Yes. The product listing on our site says it suits interior as well as exterior surfaces.
Can I fill a deep crack in one go?
The data sheet calls for thin layers, with a 1 mm maximum for each. Build up a deep repair in several coats, and let each one dry before you add the next.
How soon should I sand?
Preferably within 9 hours of application, once the final layer is dry.
Sources and method
The figures and instructions in this guide come from the manufacturer’s leaflet and the manufacturer’s UAE products page. The product listing on our site was used for the interior and exterior uses. We have not tested the product ourselves.
- Terraco, Handycoat Exterior technical leaflet (V. 10.2011), retrieved 30 October 2026.
- Terraco, Products (UAE), retrieved 30 October 2026.
- Handycoat Exterior product listing, Al Tashteb Al Saree.
Need Handycoat Exterior? Call or WhatsApp +971 525104678 and quote the product name.
