Multi PU SL

Description

MULTI PU SL SCREED is a trowel applied polyurethane floor screed for heavy duty industrial use. Highly chemical, abrasion and impact resistant, with a smooth, matt finish but still allowing hygienic cleanliness and seamless flooring. Supplied in a variety of colours for use in environments that range from back of house to wash bays, office to walkways, and light processing areas.

Typical Applications

MULTI PU SL SCREED can be used in food processing plants, cold rooms, canning factories, bottling plants, foot traffic areas and environments where food safety, wet areas and light industrial use are all prerequisites.

Advantages

• Economical
• High early strength
• High abrasion resistance
• High chemical resistance
• Moderate impact resistance
• High density
• Nonhazardous (food safe)
• Seamless
• Non slip application
• Low maintenance

Silver Ion Technology

For HACCP environments, the inclusion of Silver Ion Technology gives the polyurethane screed permanent bactericidal properties. Only included on request.

Typical Properties

Watch Points

• While polyurethane screeds are chemically resistant, they can still stain and a sealer coat is recommended in areas where concentrated dyes, or foods or chemicals with staining history are exposed to the screeds for long periods of time.
• A formal hygienic cleaning procedure is required to keep the surfaces hygienically clean and food safe.
• Polyurethane screeds are not UV stable and will yellow under bright lighting and sunlight.

Directions for Use

Application Conditions: Application temperature should be between 15C and 25C. Employ the use of localized cooling or heating equipment if necessary. Try avoid applying over hot surfaces or previously heated areas. Substrates must have a moisture content of 12% maximum and tensile strength of 1.5 N/mm² minimum.

Surface Preparation: Surfaces need to be cleaned and flattened or imperfects will show through flow applied applications. Light grinding to remove all surface defects is recommended. Scabbling and acid etching is not recommended. If the substrate is porous or there is expected to be pin hole issues or moisture concerns, a scraper coat of MULTI PU resin and hardener is recommended as a primer. Anchor grooves are to be cut at twice the thickness of the floor finish to a maximum of 10mm. Anchor grooves are to be cut around the floor perimeter, parallel to expansion joints, around upright structures, around drains, parallel to door thresholds, and at regular 3 meter spacing across the floor surface.

Priming: Prime with MULTI POXY PRIMER or MULTI PU LC coating at 500 µm thickness using a trowel and allow to cure for 12 hours in order to minimize draw in of the MULTI PU SL SCREED into the substrate and prevent pin-holing.

Application: Shake well the resin component to resuspend all the pigments in the liquid. In a pot mixer, premix the resin and the hardener until mixed together. While mixing, add in the powder aggregate gradually until all wetted out and lump free. Then transfer the mix onto the primed surface and level to the required thickness using a steel trowel. Once level, use a spike roller to remove stubborn trowel lines and reaerate the screed. Do not spike roll beyond initial set (3-5 minutes of application) or the screed will not self-level and roll marks will remain in the screed. Ensure that anchor grooves are filled completely. Allow the screed to cure for 12 hours. Protect the curing floor from damp, condensation and direct water for at least 24 hours.

Limitations: Do not apply in humidity is expected to be greater than 90% RH, or if the surface temperature is less than 3C above the dew point. Ensure that the curing temperature never drops below 5C, and do not apply over concrete that is less than 25 MPa compressive strength. Colour variations can occur between batches so apply sections from the same batch of resin. Touching up will always be visible and should be avoided. If colour variations occur, overcoat the entire surface with MULTI PU LC coating. To guard against discoloration from contact with strong oxidizing agents such as halogens, seal with MULTI PU SEALER clear matt.

Equipment Care

All tools should be cleaned with thinners or xylene immediately after use.

Packing

Supplied in 2.9LT RESIN, 2.1LT HARDENER and 14.5KG AGGREGATE.

REVISION: 3.1