Sikafloor-20 PurCem 32

Beware of condensation. To reduce the risk of condensation or efflorescence on the finished surface, the temperature of the substrate and the freshly applied material must be at least +3 °C (+37 °F) higher than the dew point temperature. Low temperatures and high relative humidity increase the probability of surface efflorescence.

The product can be applied to substrates with a high moisture content without standing water. Check for rising damp. The support must be visibly dry and have a pull-out strength of at least 1.5 N/mm² (218 psi).

Before re-covering the Product, a waiting time will be ensured as follows:

Note: Times are approximate and are affected by changes in ambient conditions, especially temperature and relative humidity. Note: If you use another Sika primer product instead of the Sikafloor® PurCem®-based leveling and pore-closing layer, please observe the recoating times indicated in the respective Product Data Sheet. Ensure that the primer or leveling and pore-closing layer is fully cured before applying the Sikafloor® PurCem® wear layer.

~2.1 kg/m² per mm thickness

MIXING EQUIPMENT

• Single paddle electric mixer (300 – 400 rpm)
• Electric mixer with two paddles (>700 W, 300 – 400 rpm)
• Forced action mixer / rotary bowl / two paddles or continuous action mortar mixer (300 – 400 rpm)

APPLICATION EQUIPMENT

• Straight trowel with rounded corners
• Scraper with pins
• Roll short hair

TREATMENT OF JOINTS AND CRACKS

IMPORTANT

Incorrect treatment of cracks

Incorrect assessment and treatment of cracks can lead to a reduced life of the finish and re-occurrence of cracks.

Existing construction joints and static surface cracks require treatment before the system is applied. Use resin-based products from the Sikafloor® and Sikadur® ranges to level and fill them.

The system can be applied to freshly poured or wet concrete without standing water. Wait at least 3 days after pouring the concrete to allow the initial shrinkage to wear out, thus preventing shrinkage cracking on the wearing surface.

The cement base layer (concrete/screed) must be solid and have sufficient compressive strength (minimum 25 N/mm 2 (3626 psi) ) with a pull-out strength of at least 1.5 N/mm 2 (218 psi) .

The substrate must be clean and free of contamination, such as: impurities, residues, oil, grease, coatings or previous surface treatments, friable materials, etc.

To prevent detachment of the material from the support in the end areas, place anchor grooves along exposed edges (perimeter, joints, connections, plinths, posts, gutters/siphons, etc.) as indicated and detailed in Method of Application: Sikafloor® PurCem®. The width and depth of the grooves must be equal to twice the thickness of the applied system.

IMPORTANT Only mix whole sets.

PROCEDURE FOR MIXING 3 COMPONENTS

1. Mix Component A (resin) until the pigment is dispersed and a uniform color is obtained.
2. Add Component B (the hardener) to Component A.
3. Continuously mix Components A + B for 30 seconds until a mixture of uniform color is obtained.
4. Pour the mixed resin into the rotary bowl mixer.
5. Start the mixer and gradually add Component C (aggregates) to the mixed resin over about 15 seconds.
6. After adding all the components continue mixing for 2 minutes, until a uniform mixture is obtained. Note: At temperatures below +15 °C (+59 °F) the mixing time increases by 30-60 seconds.
7. To ensure thorough mixing, scrape the sides and bottom of the container at least once during the final mixing step with a straight-edged trowel.

PROCEDURE FOR MIXING 4 COMPONENTS

1. Mix Component A (resin) for approx. 30 seconds.
2. Add Component D (pigment) to Component A.
3. Mix Components A + D continuously for 30 seconds until a mixture of uniform color is obtained.
4. Gradually add Component B and continue mixing for 30 seconds.
5. Pour the mixed resin into the rotary bowl mixer.
6. Start the mixer and gradually add Component C (aggregates) to the mixed resin over about 15 seconds.
7. After adding all the components continue mixing for 2 minutes, until a uniform mixture is obtained. Note: At temperatures below +15 °C (+59 °F) the mixing time increases by 30-60 seconds.
8. To ensure thorough mixing, scrape the sides and bottom of the container at least once during the final mixing step with a straight-edged trowel.

IMPORTANT

Protection of the material after application

After application, protect the System from moisture, condensation and direct contact with water for at least 24 hours.

IMPORTANT

Protection of the material from condensation and accidental leaks

During application, protect the Product from condensation or any leaks from ceiling fixtures.

IMPORTANT

Ventilation of closed spaces

Always ensure good ventilation when applying the Product in enclosed spaces.

IMPORTANT

Applications on screeds based on modified polymer cement

Do not apply to polymer modified cementitious screed substrates. When sealed with an impermeable resin, moisture can cause them to expand.

IMPORTANT

Waiting time for food products

In food industry premises, always ensure a waiting time of at least 48 hours after applying the Product, before putting the floor into use.

WEAR LAYER

1. Pour the mixed Product onto the prepared support. Note: Consumption is indicated in the Application Information chapter.
2. Spread and compact the Product between the guide rails/slats (if fitted) using a straight edge trowel or pin squeegee, respecting the layer thickness. Note: For a seamless finish, keep the "wet edge" during application.
3. Level the surface of the screed using a leveling ruler resting on the guide rails/slats.
4. Finish the surface using a straight-edge trowel, short-hair roller or floor chopper to achieve the desired roughness.

Clean all tools and application equipment with Sika® Thinner C immediately after use. The already hardened material can only be removed mechanically.