Double-sided sanding discs for professional floor preparation
For professional 16-inch single-disc machines – usable on both sides, in K16 to K100.
The substrate, coating and work stage determine stock removal and change intervals. A clear grit choice keeps the job predictable.
Do not start unnecessarily coarse or move to a fine grit too soon.
Assess the surface condition and coating first.
Make full use of both sides.
Progress through grits in sensible steps.
Plan the right pack quantity before the project begins.
Allow a reserve for condition, pressure and working method.
Substrate & grit
Choose the typical application. The recommendation below updates immediately.
For heavy stock removal on mineral substrates. Assess the surface and coating first.
The product image uses P-grit markings. The shop lists the range as K16 to K100, with K40 also available.
K16 exclusively in a 5-pack · other grits in 10- or 20-packsThe images are application illustrations, not customer references. The grit recommendation is a guide; the substrate, coating, machine and surface condition may require a test area or a different sequence.
Material requirements in seconds
Enter the area and floor condition – the planner shows a transparent requirements range and a practical pack quantity.
Plan for one full-surface pass. If the build-up is unknown, test a small area first.
Select a suitable 10-packPlanning range: 15–40 m² per complete disc and sanding pass, followed by a 15% reserve. No published laboratory figure is available for this exact RIWO disc, so the result is deliberately shown as a range. A heavily worn surface is planned with two passes.
Method: reserve principle · documented guidance of 30–40 m² for 406 mm screens · further guidance of two screens for up to 30 m². The result remains a planning aid and does not replace a test area.
Direct offers
K16 is available exclusively as a 5-pack. All other grits are available as 10- or 20-packs.
5 discs in one pack. Only in K16 – for very heavy stock removal and tough old coatings. Test a small area before treating the full surface.
Prices include 19% VAT, plus delivery. Product prices and availability may change; the relevant shop page is authoritative. K40 was sold out when checked on 13 July 2026.
Setup
The white Superpad provides a flat, force-transmitting base and protects the back of the double-sided sanding disc from unnecessary wear.
The drive board, Superpad and sanding disc must be compatible and precisely centred. Switch the machine off completely before fitting, turning or changing the disc.
The illustration explains the functional layer structure. The operating instructions, drive-board diameter, mounting system and suitable backing pad are decisive. RIWO Commerce has no commercial or legal affiliation with the machine manufacturers mentioned.
Machines & systems
According to manufacturer documentation, these well-known machine families use 405–407 mm or 16-inch drive-board and pad systems. Check the specific model variant and mounting system before use.
Documented with a 406 mm drive board and white 406 mm intermediate pad.
400 mm machine with a documented 406 mm / 16-inch drive board.
406 mm drive board and white 406 mm pad for the sanding setup.
16-inch system with 407 mm abrasive and 16-inch pad drive.
Typical system with 406 mm abrasive, drive board and intermediate pad.
Compatibility notice: The brands and model names mentioned are the property of their respective rights holders and are provided solely for technical context. RIWO Commerce has no business relationship with the manufacturers mentioned; there are no partnerships, contracts, manufacturer approvals or endorsements. Before use, check the drive-board and pad diameters, mounting system, speed, permitted accessories and operating instructions for the specific model variant. Use only with a suitable drive board and white intermediate pad, and test a small area first.
Application images
The images show different stages of preparation on the same surface. Tap or hover over an image to reveal the substrate, starting condition and work stage.
Before / afterOn the left, the surface is visibly smoother after coarse sanding.
Before / afterOn the left, the wood is clearly exposed and more even.
Before / afterOn the left, the surface appears more even and smoothly prepared.
Before / afterOn the left, the wood appears lighter and more even.
The images document visible stages of preparation. Exact grit numbers cannot be determined reliably from photographs alone, so only confirmed work stages are stated.
Expert knowledge
Select a topic and open the key guidance instantly.
Double-sided sanding discs have a usable abrasive surface on both sides. When the first side loses effectiveness, switch off and open the machine, then turn the disc over.
Silicon carbide is a very hard, sharp-edged and comparatively brittle abrasive grain. Confirmed applications for these RIWO discs include parquet, hardwood, concrete, screed and old paint.
K16/K24 are for very heavy stock removal, K36/K40 for initial sanding, K60 for intermediate sanding, and K80/K100 for finer preparation. The exact sequence depends on the floor and subsequent treatment.
Dry machine sanding of concrete and screed can create heavy dust exposure. Effective extraction, suitable respiratory and hearing protection, and compliance with the machine instructions are essential. Applicable occupational-safety requirements must also be observed.
Abrasive grains differ in hardness, toughness and fracture behaviour. A blanket ranking would be misleading: the material, coating, machine and work stage determine the right choice. This page describes only the confirmed applications of RIWO silicon carbide discs.
If stock removal drops noticeably or the sanding pattern becomes uneven, switch off the machine and inspect the disc. A worn first side can be turned over; do not continue using damaged discs.
B2B & larger quantities
For flooring contractors, renovation firms, facilities services, industry, machine-hire companies, specialist retailers and resellers. Terms are discussed individually and are not published.
FAQ
Both sides of the disc can be used. When the first side loses effectiveness, switch off the machine, inspect the disc and turn it over.
K16 is available exclusively as a 5-pack. K24, K36, K40, K60, K80 and K100 are available as 10- or 20-packs.
The diameter is Ø 406 mm, or 16 inches, and the centre hole measures 25 mm.
The product guidance specifies a suitable white Superpad as a support and protective layer. Always centre the pad and disc precisely.
K16 or K24 are often suitable for heavy stock removal. Continue through progressively finer grits afterwards. If in doubt, test a small area first.
K60 is intended for intermediate sanding and preparation for finer grits. The exact sequence depends on the substrate and finishing system.
There is no reliable flat-rate figure without verified consumption data. The substrate, coating, machine, contact pressure and working method all affect consumption.
For single-disc machines with a compatible Ø 406 mm / 16-inch system and suitable backing pad. The drive-board diameter, mounting system and operating instructions must all match.
When checked on 13 July 2026, K40 was sold out in both pack sizes. Current availability is shown on the relevant product page.
Yes. Trade customers can submit the substrate, grit, expected quantity and frequency of use through the enquiry form. Terms are discussed individually.
Direct from RIWO Commerce
Talk directly to RIWO
Describe the substrate, area and planned work stage. Your enquiry goes directly to info@riwo-commerce.com.
