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APU 40 Cork encapsulated interlayer

APU 40 2 component polyurethane intermediate coating incorporates a cork crumb and is designed to absorb vibration and reduce noise. Specifically designed for use with APU 45 to achieve a comfortable floor with noise reduction qualities.

Solvent free


Reduces subsonic noise

Walking noise reduction

Increased walking comfort

Long working life

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Product Features

2 Component Vibration Absorbent Polyurethane Intermediate Coating.

APU 40 is a high quality, 2 component, Polyurethane underlayment designed to absorb vibration and reduce noise. Specifically designed for use with APU 45 to achieve a comfortable floor with noise reduction qualities. Once combined the system will result in a seamless coating of between 5mm and 7mm. This coating is designed to offer ease of cleaning and maintenance with a comfortable walking experience and sound deadening qualities both in the room where the system is laid and adjacent rooms.

These high-quality coating-combinations are suitable for commercially used areas as well as private homes where the environment places a high demand on the floor, e.g. recreation rooms, living rooms and business areas, doctor’s offices, nurseries, homes for the elderly, rehabilitation facilities, fitness and spa areas and many more.

Sealing with APU 46 results in an even, matt surface. The “mirror effect” of gloss coatings is reduced by light dispersion on the surface. This means that the product is ideal for visually demanding areas as it reduces glare and obvious marking.

The final sealer APU 46 cures by physical drying and chemical cross-linking to a consistent strong film. The resultant surface is a hard, abrasion resistant, photo-stable film with very little tendency to staining. It also has the important added benefit of being very easy to clean. APU 46 is extremely resistant to water based solutions, diluted acids and alkalis as well as engine and fuel oil. The product is very resistant to staining from household chemicals, strongly dyeing foodstuffs and drinks like beer/ale, red wine or coke.

Areas of Use:

  • As a flexible interlayer for high-quality polyurethane coatings.
  • Suitable for public facilities, offices and hotels as well as schools, universities or nurseries and others.
  • Suitable for health care facilities, like doctors’ offices, homes for the elderly and rehabilitation centres
  • Decreases ambient and subsonic noise and increases walking comfort for floors in commercially used areas and private homes.
  • Low-emission for coatings in recreation rooms.


“This is flooring made easy. I’ve never come across a product that self levels so quickly and easily. The beginning of a run is already levelled before I’ve gotten to the end of it.” – Alan Burns, Director, Imperial Resin Coatings

Technical Data

1 kg Yield at prescribed Film Thickness of 3 to 5mm is 0.33 to 0.2 m²

Layer Thickness: Standard 3.5mm

Re Coat window: 18-24 hours but within 48 hours @ 20 °C

Tack free 12 hours @ 20 °C

Available in 10kg and 24kg units

Apply with notched trowel or squeegee