Körapur 689 15 kg – 2K PU Poured Floor Coating for Trucks & Containers

Körapur 689 15 kg – 2K PU poured floor top layer for transport vehicles

Körapur 689 is a two-component polyurethane (2K PU) solvent-free system used as a poured floor top/cover layer for trucks, containers, sales vehicles/mobile shops, motorhomes and trailers. It is designed for cargo areas that face constant mechanical wear, hygiene demands and temperature stress, while still requiring long-term durability.

Where it is used and why

This system is primarily intended for vehicles transporting fresh goods (meat, fish) as well as refrigerated/frozen transport. It is tested for low temperatures down to -30 °C, which makes it suitable where common floor coatings can become brittle or lose performance. It is also stated as approved for (indirect) contact with food, with a test certificate available.

Substrates and compatibility

Körapur 689 is designed for typical body-building substrates such as polyester / GRP laminates, aluminium, primed steel sheets and wood. Final adhesion depends heavily on surface preparation. For wood, moisture control matters; for metals and laminates, proper degreasing and abrasion are critical.

Key technical data (practical selection points)

• Chemistry: polyurethane, 2K, solvent-free
• Color: grey (approx. RAL 7037)
• Hardener / accelerator: Köracur TH 240
• Mix ratio: 4 : 1 by weight (resin : hardener), 3.3 : 1 by volume
• Processing temperature: +15 to +25 °C
• Pot life: approx. 40 min at +20 °C (in practice, spread quickly for best self-levelling)
• Consumption / coverage: a 15 kg set typically covers about 3 m² at 3–4 mm thickness

Recommended application procedure

1) Surface preparation

The substrate should be level, dry, clean and free from dust and grease. Polyester/GRP is commonly abraded (and cleaned to remove any release agents). Aluminium and stainless surfaces are degreased and abraded. Primed steel relies on correct primer selection and a controlled process.

2) Mixing

Mix precisely at 4 : 1 (A:B) at moderate speed until the blend is uniform. Then transfer into a clean second container and mix briefly again. This reduces the risk of unmixed zones that can create soft spots in the floor.

3) Pouring and spreading

Pour the mixed material onto the marked area and spread with a notched trowel to the target thickness. After mixing, it is recommended to work the material within a short time window (practically within ~15 minutes) to maintain good flow and avoid uneven levelling.

4) Curing

Light foot traffic is typically possible after 6–8 hours. Final properties are typically reached after about 24–36 hours (higher temperature accelerates curing, lower temperature slows it down).

Anti-slip surface and extended service life

For an anti-slip surface, the standard method is:

• Broadcast granules during curing (often after approx. 1–1.5 hours so they do not sink), then seal with Körapox BS 85. This combination delivers a highly durable, long-life surface in intensive service.
• Alternatively, an anti-slip structure can be created via an additional compatible system layer (e.g., Körapur 690), while respecting the recommended recoat window (commonly within 24 hours between layers).

Food transport and refrigerated applications

For food transport, the challenge is not only wear but also hygiene and material safety. Körapur 689 is described as physiologically harmless and approved for (indirect) food contact, with a test certificate available—relevant for meat/fish transport bodies, catering builds and refrigerated vehicles.

Limitations you should not ignore

UV stability: Körapur 689 is not UV-stable; long-term light exposure may cause color change. In enclosed cargo areas this is usually acceptable, but it should be considered for exposed applications.

Cleaning, storage and logistics

• Tool cleaning: clean immediately after use with a suitable PU system cleaner; cured material must be removed mechanically.
• Storage: do not store below approx. +10 °C; typical shelf life is up to 12 months in unopened packaging.
• Pack size: 15 kg set.