Description
A pair of reveals, an entrance surround or a short return beside the door rarely needs a full 25 kg bucket. The Ceresit CT177 mosaic render 10kg bucket is the same coloured-quartz plaster in the size that suits those small, separate zones.
Where the Ceresit CT177 Mosaic Render 10kg Fits
CT 177 is a decorative thin-layer plaster of coloured quartz grits, 1.0 to 1.6 mm, in transparent resin, finished smooth with a metal trowel. Ceresit declares it to EN 15824 under Declaration of Performance No. 00469, and one data sheet covers both the 10 kg and the 25 kg bucket.
- Window and door jambs: named by Ceresit among the outdoor surfaces that get dirty quickly, often small enough for a single 10 kg bucket.
- Short plinth returns and balustrades: the other outdoor surfaces on the same list.
- Entrances, corridors and staircases: the indoor walls Ceresit names as exposed to wear and dirt.
Ceresit describes the finish as easy to keep clean, resistant to scrubbing and able to bridge hair-line substrate cracks so they stay hidden. It should not be used where moisture lingers for long periods.
How Far a 10 kg Bucket Goes
At Ceresit's approximate yield of 4.0 kg/m² for the 1.0–1.6 mm grits, one 10 kg bucket covers about 2.5 m² (10 ÷ 4.0). Because the layer is at least 1.5 times the grain size, a kilo of CT 177 covers less wall than a kilo of Ceresit's 1.5 mm thin-coat renders CT 74 and CT 76, declared at 2.1–2.5 kg/m².
- Two reveals: two jambs 1.2 m high and 0.2 m deep plus a 1.0 m by 0.2 m head come to about 0.7 m², which is under 3 kg. One bucket covers about three windows of that size.
- Entrance surround: 2.5 m² of wall is one full 10 kg bucket with no margin, so round up to two for a clean finish.
- When the area passes about 5 m²: the 25 kg bucket gives the same plaster in one batch, and Ceresit asks for one batch across a single plane.
Key Figures for the 10 kg Bucket
The values below are the plaster's own, except the impact class, which comes from an ETAG 004 test of a whole insulation system.
| Property | Value |
|---|---|
| Grain | coloured quartz, 1.0–1.6 mm |
| Yield | approx. 4.0 kg/m² |
| Density | approx. 1.75 kg/dm³ |
| Adhesion | 0.6 MPa, EN 15824 |
| Water absorption | W3, EN 15824 |
| Vapour permeability | V2, 0.14 ≤ Sd < 1.4 m, EN 15824 |
| Impact resistance | category I, ETAG 004 (system test) |
| Working conditions | +10 °C to +25 °C, humidity below 80% |
| Preliminary drying | approx. 30 minutes |
| Rain resistance | after approx. 3 days |
| Shelf life | up to 12 months, cool, frost-free |
The full table, including the system figures and the fire classes of the Ceretherm systems, sits on the 25 kg CT 177 bucket. The values are the same for both sizes.
Getting a Small Area Right
Small zones are where joins and colour differences show most, because the eye compares them with the wall around them. Five steps from Ceresit's sheet keep them invisible.
- Prime in a matching colour. Use Ceresit CT 16 quartz primer in a colour close to the plaster and let it dry completely. Absorbent substrates take CT 17 first, then CT 16 after at least 2 hours. Both primers are in the quartz primer range.
- Measure any water. The limit is 250 ml per 25 kg, which works out at no more than 100 ml for a 10 kg bucket.
- Mix gently and briefly with a slow-speed drill; long, hard mixing can discolour the stone and trap air.
- Finish each reveal in one go, wet-on-wet, with a stainless steel trowel, in a layer at least 1.5 times the grain size. Do not sprinkle it with water.
- Use tape for a clean edge. Run it along the line, finish to it and pull it while the plaster is fresh.
Keep one production batch on each plane. If a doorway and the plinth beside it look like one surface, buy them together. The plinth application guide walks through the same steps on site.
Dark Colours on Small Areas
Deep shades suit the small zones this bucket is bought for. Ceresit sets two conditions:
- Light reflectance: HBW 20 or above is recommended; below that, consult the Ceresit technical department.
- Intense dark colours on a Ceretherm insulation system: limited to small areas such as plinths and architectural details.
10 kg or 25 kg Bucket
| Bucket | Covers about | Suits |
|---|---|---|
| 10 kg | 2.5 m² | reveals, jambs, small repairs |
| 25 kg bucket | 6 m² | continuous plinth runs |
Ordering the 10 kg Bucket
Order the Ceresit CT177 mosaic render 10kg with its CT 16 primer, in the same colour reference across every zone that will be seen together. The plinth render range at Renders World holds both bucket sizes.
- Dispatch: Renders World processes orders the same day when the stock is there.
- Delivery: quoted by the team after the order is placed; every delivery is kerbside.
- Collection: Unit 9A, Central Trading Estate, Southampton SO14 5JP, Monday to Friday 7am to 5pm, Saturday 7am to 12pm.
FAQ — Ceresit CT 177 in the 10 kg Bucket
Is the 10 kg plaster the same as the 25 kg?
Yes. One Ceresit data sheet and one Declaration of Performance, No. 00469, cover both sizes.
How much area does one bucket cover?
About 2.5 m², at Ceresit's approximate yield of 4.0 kg/m².
How much water can go in a 10 kg bucket?
No more than 100 ml:
- Ceresit's limit is 250 ml per 25 kg;
- 10 kg is two fifths of that, so 100 ml;
- too much water makes the plaster unusable.
Can I keep a part-used bucket?
Close it tightly and use it up as soon as possible. Unopened, it keeps up to 12 months in cool, frost-free conditions away from direct sun.
Technical Documentation — Ceresit CT 177