Head to head
Bona FlexiSand 1.9 vs Karcher K5 Power Control Flex
The Bona FlexiSand 1.9 is a single-disc rotary floor sanding and buffing machine. The Karcher K5 Power Control Flex is a domestic electric pressure washer for patios, cars and outdoor cleaning.
Last reviewed 13 September 2026
Specifications side by side
| Bona FlexiSand 1.9 | Karcher K5 Power Control Flex | |
|---|---|---|
| Weight | 50kg (plus optional 11kg magnetic weight) | 12.4 kg (without accessories) |
| Power | 1.9kW | - |
| Voltage | 230V, 50Hz, 11A | - |
| Disc diameter | 407mm (16in) | - |
| Max pressure | - | 20-145 bar |
| Max flow rate | - | 500 l/h |
| Area performance | - | 40 sq m per hour |
Sources: Bona FlexiSand 1.9, Karcher K5 Power Control Flex. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the FlexiSand 1.9 if...
A single-disc rotary sander used for buffing, screening and light sanding rather than heavy stock removal, which is why floor contractors keep one alongside a belt or drum sander rather than instead of one. Its 407mm disc and 1.9kW motor put it in the same bracket as other single-phase rotary buffers sold through UK flooring trade counters.
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Buy or hire the K5 Power Control Flex if...
The K5 sits in Karcher's mid-to-upper domestic range, bought outright by homeowners for regular patio, car and garden furniture cleaning rather than hired. It is frequently the model UK reviewers and retailers use as the benchmark domestic Karcher pressure washer.
Full K5 Power Control Flex specifications →Common questions
What is the difference between the Bona FlexiSand 1.9 and the Karcher K5 Power Control Flex?
The Bona FlexiSand 1.9 is a single-disc rotary floor sanding and buffing machine; the Karcher K5 Power Control Flex is a domestic electric pressure washer for patios, cars and outdoor cleaning.
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