Sanding sponge KWB 089121 — Medium/Fine grit, aluminium oxide, 100×70 mm, 26 mm thick

KWB 089121 sanding sponge is a hand sanding accessory with Medium/Fine aluminium oxide abrasive on multiple faces, designed for shaping, smoothing and finishing a variety of surfaces. The 100×70 mm format and 26 mm thickness provide a comfortable grip and even pressure distribution. The flexible polyurethane foam body adapts to contours and edges, while the phenolic resin bonding ensures abrasive durability. The sponge can be used wet or dry and allows sanding waste to be washed off for extended use.

Advantages

The sanding sponge combines aluminium oxide abrasive on four sides, one short side and one large side, giving multiple working surfaces with two different grit areas for coarse removal and finer finishing. Its medium/fine grit balance makes it suitable for both material removal and final smoothing. The flexible foam core enables access to curved profiles and edges without gouging flat surfaces. Built for wet-and-dry use, this sponge tolerates rinsing to remove clogged particles and maintain cutting performance.

Suitable for

• Manual sanding of wood surfaces, including furniture and trim
• Smoothing painted surfaces and between coats
• Light filler and putty finishing
• Shaping curved or profiled edges and mouldings
• Wet sanding applications to reduce dust and improve finish

Key specifications

• Overall dimensions: 100 × 70 mm
• Thickness: 26 mm
• Abrasive: aluminium oxide on multiple faces
• Grit: Medium/Fine (two different grit faces)
• Core material: flexible polyurethane foam
• Bonding: phenolic resin
• Use: suitable for wet-and-dry sanding
• Cleaning: sanding waste can be washed off

How to use

Hold the sanding sponge with light, even pressure and move it along the workpiece in the direction appropriate for the material (with the grain on wood). Use the larger flat faces for broad surface work and the smaller or edge faces to reach contours and tight spots. For wet sanding, moisten the sponge and the work surface lightly to reduce dust and achieve a smoother finish; rinse the sponge periodically to remove clogged particles. Replace the sponge when the abrasive layer is worn and no longer provides consistent cutting action.

Usage recommendations

For best results on wood and painted surfaces, start with the coarser face to remove irregularities and switch to the finer face for finishing. When working on delicate profiles, apply minimal pressure and use the sponge's flexible edge to avoid rounding sharp details. Rinse the sponge under running water during wet sanding to extend usable life and maintain performance.