Description
A tiling sponge is chosen on stroke geometry rather than on volume. The KAEM 2024-132312 runs its long axis along the joint line, which suits subway tile, plank porcelain and long horizontal render features — and it carries less face area per pound than the square format in the same line.
Where the KAEM 23 × 11.5 × 7 cm Sponge Works Best on Long Joint Runs
The professional tiling sponge 23 × 11.5 × 7 cm is the length-led KAEM format for continuous joint lines, stocked at Renders World at £3.80 per sponge in August 2026 for grout clean-down and render clean-off passes. Its long axis is the whole reason the format exists.
Sitting in the power floats and sponges range as a pure hand tool, the 230 mm length lets a single pull track a full course of linear-set tile without breaking the motion at the sponge's edge. The 115 mm width is the second half of the decision: narrower than the 140 mm square format in the same line, it clears plumbing penetrations, switch plates and reveal returns where a wider face collides with the adjacent surface.
- Subway and metro tile: the joint runs horizontally in long unbroken lines, which is exactly what a 230 mm face is for.
- Plank-format porcelain and brick-bond layouts: the stroke follows the plank's long axis rather than crossing it.
- Bathroom and kitchen geometry: the narrow body reaches between fittings and into returns.
- Horizontal render features: sill returns, bellcast bead runs and banding between storeys, where the wipe follows a straight line.
Why Tilers and Renderers Choose the Length-Led Format
The case for this sponge is geometric, not material — the foam is the same class of synthetic sponge sold across the range, so the format is what a buyer is actually paying for.
- 230 mm face for single-stroke joint wipes: one continuous pull clears a full course on linear-set patterns instead of two overlapping passes.
- 115 mm narrow profile: fits geometry that a 140 mm-wide face cannot enter cleanly, including reveals and pipe collars.
- 70 mm depth: the same depth as the large square KAEM, so the sponge body compresses and recovers the same way under hand pressure.
- Stroke-aligned hand position: the wrist stays in line with the pull rather than turning across it, which is why linear-set work reads as easier in this format.
- One product code across suppliers: the code and EAN identify the exact sponge, which matters when comparing trade prices.
KAEM 2024-132312 Sponge Specification and Dimensions
| Property | Value | Read from |
|---|---|---|
| Nominal dimensions | 230 × 115 × 70 mm | Store product record, August 2026 |
| Nominal face area | about 265 cm² | Calculated: 230 × 115 mm |
| Working depth | 70 mm | Store product record |
| Material | Polyurethane synthetic foam | KAEM/Hardy distributor listing, EAN 5905061037017 |
| Manufacturer code | 2024-132312 | Store record and distributor listing |
| EAN | 5905061037017 | Store product record, August 2026 |
| Listed shipping weight | 200 g | Store product record, August 2026 |
| Price | £3.80 per sponge, August 2026 | Store product record |
| Stock | Listed as available, August 2026 | Store product record |
Order this sponge on its code rather than its stated width. The store record and its Polish supplier listing both give the width as 11.5 cm, while two other KAEM/Hardy distributors list the same code as 23 × 12 × 7 cm — so the narrower figure is the one published here, and code 2024-132312 with EAN 5905061037017 is what actually confirms two quotes are for the same sponge.
No manufacturer data sheet for this sponge was retrieved this session, so pore grade, water capacity and absorbency figures are deliberately absent from the table above. What the distributor listing does confirm is the material — polyurethane synthetic foam, the same family as the rest of the KAEM hand range.
How to Use the Sponge on Grout and Render Clean-Down
- Soak it through before first use. Fresh foam briefly resists water until it has wetted right through the body.
- Wring to damp, not dripping. A damp face lifts residue; a flooded one carries water back into bedded grout.
- Align the long axis with the joint before the stroke starts, so the geometry is doing the work.
- Pull the full course in one motion. Plan the pull to the wall length first — a continuous stroke keeps the haze even, and a mid-pass stop shows as a step under raked light, which is the one reason to match sponge length to tile run.
- Rinse in clean water and rotate the face every few wipes, squeezing deliberately; the long sides take most of the pressure and soften first.
On facades this is a hand pass, not a machine one — the sponge mounts to nothing, and pads for the render smoothing machine are separate items in the same collection. The Renders World guide to power floats for render finishing sets out where hand sponges sit alongside machine pads in the finishing sequence.
The same sponge earns its place off the wall as well as on it. Tools, buckets and mixing paddles come clean faster with a large damp face than a rag, which is why it is stocked next to the EPS adhesives basecoats range, and why it is worth keeping one in the van for wiping down beads, sills and trims after thin-coat silicone render work.
How the Format Compares With the Other Two KAEM Sponges
The choice inside the KAEM line is geometry against area, and the price ladder makes it explicit. All three figures below were read from the store in August 2026.
| Sponge | Nominal face and depth | Price, Aug 2026 |
|---|---|---|
| KAEM 23 × 11.5 × 7 cm (this sponge) | ~265 cm² · 70 mm · length-led | £3.80 |
| KAEM 20 × 14 × 7 cm large square sponge | 280 cm² · 70 mm · square | £2.60 |
| KAEM 15 × 10 × 5 cm compact sponge | 150 cm² · 50 mm · compact | £1.20 |
Read the two right-hand columns together before ordering. Face area per pound spent runs 265 ÷ 3.80 ≈ 70 cm² per £1 for this sponge against 280 ÷ 2.60 ≈ 108 cm² per £1 for the square and 150 ÷ 1.20 = 125 cm² per £1 for the compact — so the length-led format is bought for reach and stroke alignment, and the square is the one to buy when the job is simply large.
Which KAEM Sponge to Order for Your Job
- Subway, plank porcelain and brick-bond tile: this sponge, worked along the joint direction.
- Tight geometry around fittings, reveals and returns: this sponge again — the 115 mm width is the deciding dimension.
- Open floors and large-format square tile: the 20 × 14 × 7 cm square format gives more face for the money.
- Mosaic, small-format tile and detail work: the 15 × 10 × 5 cm compact format tracks a tight joint grid more accurately.
Most working kits hold two formats rather than one, and at these prices building the pair is a small decision. Add this sponge to the order as the linear-set and reach tool, and Renders World holds the rest of the hand and machine finishing tools on the same account for the bulk and detail passes.
FAQ — Buying and Caring for the 23 × 11.5 × 7 cm Sponge
How many should be ordered for a full bathroom or elevation?
Two is the usual working answer — one in the hand and one clean on the van — because wear concentrates on the long edges of whichever sponge does the first passes. A single sponge completes most jobs, and the second keeps a multi-day run moving without a trip to the merchant.
Does it fit the render smoothing machine?
No. This is a hand sponge with no mounting face, and the machine takes its own pads, listed separately in the same collection. On a render job it follows the machine on the surface rather than attaching to it.
How does it differ from the 20 × 14 × 7 cm square KAEM?
Nominal face area is close — about 265 cm² against 280 cm² — but the distribution is the point: length along the stroke here, spread across it there. Linear-set tile and reach work favour this one; open floor area favours the square, which is also the cheaper of the two.
Is it worth using on mosaic and small-format tile?
It handles the bulk wipe perfectly well, but the geometry stops paying: a 230 mm face oversteps individual mosaic tiles, so nothing is gained from aligning to the joint. Below roughly 200 × 200 mm tile, the compact format gives better control on the grid.
How should it be cared for between jobs?
Rinse it out thoroughly at the end of each session rather than letting grout or render residue set inside the foam, keep it damp while the job runs, then dry it fully before storage. Replace it once the long edges break down or the body stops recovering its shape after wringing.