Hychem Hycrete PU-SL — Polyurethane concrete flooring system

• The concrete substrate should be firm, clean and dry. The compressive strength of the surface must be a minimum of 25 MPa and the surface tensile strength a minimum of 1.5 MPa.
• New concrete is to be a minimum of 7 days old. The surface of the concrete will need to be mechanically prepared by either diamond grinding, shot blasting or scarifying. All weak and loose material, surface laitance, contaminants and coatings or curing compounds must be completely removed. It is preferred that the prepared surface has a profile to ensure both excellent chemical and mechanical adhesion.
• Anchoring grooves minimum 10 mm wide and 10 mm deep will need to be cut just inside the perimeter of the area to be topped as well as around drains.
• Double diamond blade saw cuts 6 x 6 mm must be placed over the entire floor at maximum distance of 4 m intervals.
• Porous concrete will require priming, if unsure then onsite tests must be carried out.

Apply a 1mm scratch coat of Hycrete PU-SL(m) to the prepared surface.

1litre Hycrete PU-SL(m)/m2 /mm thickness.

Hycrete PU-SL(m) is a 3 component product consisting of a resin, hardener and blended fillers.

Component breakdown:

This mix yields 10.50 Litres

Hycrete PU-SL(m) is an industrial flooring finish which may discolour on exposure to UV light from the sun or an artifical source. The severity of discolouration is dependant on colour choice. Any such discolouration has no effect on the performance of the product.

This product has a shelf life of 9 months from date of manufacture, stored away from sunlight at 25 °C in original un-opened container.

The resin and hardener are to be mixed together in the correct ratios using a mechanical variable speed helical mixer for at least 1 – 2 minutes prior to the addition of the bag of Hycrete PU-SL(m) aggregate. Continue mixing until all the ingredients have been incorporated and are thoroughly mixed, with the final mix being totally homogenous. It is important to maintain continuity of mixed material on site to maintain the wet edge of the applied topping.

Apply the mixed product over the prepared surface using either pin rake or notched trowel set at the correct thickness (3-4mm). The topping is then rolled with a spiked roller to remove entrained and entrapped air.

Where a 6 mm anti-slip topping is required it is necessary to broadcast the applied 4 mm Self levelling topping with the chosen aggregate to a beach finish and allowed to cure. Once cured the excess aggregate is swept and vacuumed away. The surface is now ready for sealing with Hycrete PU-TC(m). The non-slip texture of the system will be determined by the size of the aggregate used.

Apply the Hycrete PU-SL(m) broadcast system in two layers to achieve a final film thickness of 9 mm using the Hycrete PU-TC(m) as a final seal coat.

The hardness of the broadcasting aggregate will impact on the durability and lifespan of the applied flooring system. The harder the aggregate, the better the long term performance. The following list shows a comparative hardness of some commonly available aggregates.

For heavy duty environments where exposure to regular hard wheeled traffic or constant mechanical abrasion is common, Hychem strongly recommend consideration be given to choosing either Bauxite or Aluminium Oxide as the broadcasting aggregate.

Hychem reserve the right to modify the content of any technical data sheet at any time, without prior notice. It is the users responsibility to obtain the most recent and up to date issue.

Due to the many different substrates and working conditions that can be experienced either during application or following installation, Hychem can provide no guarantee of an application result.

Hychem recommend the application of test samples on site for evaluation prior to any final installation.

Wear gloves, eye protection masks and overalls during mixing and application. Refer to msds for further information.