Short answer: National Spray Plaster Fine is a white, water-based coating that gives a smooth finish on interior concrete, plaster, wood, walls and ceilings, including uneven masonry and unplastered blockwork. Apply two coats at 0.5 to 1 mm each with a conventional spray-plaster gun or a putty knife, 6 to 8 hours apart at 30°C. Thin 5 to 10% with water depending on the thickness you need. It is for interiors only.
When to use Spray Plaster Fine
It sits between a filler and a plaster. Where Stucco Filler smooths walls that are already flat and Block Filler seals pores, Spray Plaster Fine builds 0.5 to 1 mm per coat, enough to even out uneven masonry, and can be sprayed over large areas. Typical jobs: unplastered blockwork in stores or service areas, patchy ceilings, and walls with visible joints.
Key facts
| Type | Water-based spray plaster |
| Surfaces | Interior concrete, plaster, wood, walls, ceilings, uneven masonry, unplastered blockwork |
| Finish and colour | Smooth, white |
| Volume solids | 57 ± 2% |
| Specific gravity | 1.68 |
| Thickness | 0.5 to 1.0 mm per coat |
| Drying at 30°C | Touch dry 1 to 2 hours; recoat 6 to 8 hours |
| Application | Conventional spray-plaster gun or putty knife |
| Thinning | 5 to 10% with water, depending on thickness |
| System | Two coats |
| Shelf life | 18 months, sealed |
Step by step
- Prepare: clean, dry and sound, as National’s surface preparation guide requires. Brush off loose mortar and dust; remove efflorescence.
- Fill big gaps with Joint Filler.
- First coat: spray or knife 0.5 to 1 mm; thin up to 10% for spraying.
- Wait 6 to 8 hours at 30°C.
- Second coat, then finish with the interior wall system of your choice.
How much to buy
A 1 mm coat on 1 m² is 1 litre of wet material, and at 57% solids leaves about 0.57 mm dry. So, working from wet film:
| Area | Two coats at 0.5 mm wet | Two coats at 1 mm wet |
|---|---|---|
| 10 m² | about 10 L | about 20 L |
| 50 m² | about 50 L | about 100 L |
| 100 m² | about 100 L | about 200 L |
Frequently asked questions
Can I use it outside?
No, the data sheet lists interior use only. For exterior walls, look at Block Filler and National’s textures such as Synplast.
Does it replace cement plaster?
It is a finishing coat of up to about 1 mm per coat, not a structural or levelling plaster.
Buy in Sharjah and Dubai
Al Tashteb Al Saree is an authorised National Paints retailer in Bu-Tina, Sharjah. Message us on WhatsApp with your wall area and we will estimate the quantity.
Sources
- National Spray Plaster Fine data sheet (PDF)
- National Paints surface preparation guide, Sec. A-2 (PDF)
All via AEC Online, retrieved 4 November 2026. Quantities are our own calculations. The main image is illustrative.
