Description Sikafloor® Level-25CA is a single-component, polymer-modified, versatile, and durable floor screed designed for interior concrete floors. It can be applied either manually or using a pump to achieve quick, smooth, and cost-effective substrate leveling before installing the final floor finish. It is typically applied at a thickness of 5–25 mm (3/16–1 inch). Applications Factories Commercial buildings Cellars Corridors Warehouses Hospitals Residential areas Fast-track construction projects Leveling precast concrete slabs Advantages Self-levelling with high fluidity Suitable for both pump and manual application Ideal for renovating and leveling old floors Rapid drying time Foot traffic accessible in 4 hours at 23°C (73°F) Excellent base for tiles, sheet flooring, wood floor bonding, and resin flooring Low odor Can also serve as a wearing surface Technical Data Packaging: 25 kg (55 lb) bags Color: Concrete grey Yield: Approximately 14 L (3.7 US gal.) per bag Coverage per 25 kg bag: 5 mm (3/16 in) thickness: 2.8 m² (30 ft²) 10 mm (3/8 in) thickness: 1.4 m² (15 ft²) 16 mm (5/8 in) thickness: 0.88 m² (9 ft²) 25 mm (1 in) thickness: 0.56 m² (6 ft²) (Values are approximate and do not account for surface porosity, profile, or wastage) Shelf Life: 1 year in unopened packaging, store in a dry location at temperatures between 5°C and 25°C (41°F and 77°F) away from rain, moisture, or high humidity Mix Ratio: 4.25 L (1.12 US gal.) water per 25 kg (55 lb) bag Properties at 23°C (73°F) and 50% RH Density (wet mix): 2.07 kg/L (129 lb/ft³) Application Temperature: Minimum 10°C (50°F), maximum 25°C (77°F) Application Thickness: 5 mm (3/16 in) minimum, 25 mm (1 in) maximum Compressive Strength (ASTM C109): 24 hrs: 18.8 MPa (2727 psi) 3 days: 22.8 MPa (3307 psi) 7 days: 24.5 MPa (3553 psi) 14 days: 28 MPa (4061 psi) 28 days: 31 MPa (4496 psi) Setting Time (ASTM C266): Initial set: 30 minutes Final set: 40 minutes Flowability (ASTM C230 modified): 0 min: 300 mm (11.8 in) 15 min: 240 mm (9.45 in) Working Time: 25 mm (1 in) thickness: 20 minutes Overcoating Times Water-based materials: 8 hours Solvent-free materials: 24 hours Solvent-based materials: 36 hours Final Drying Time Foot traffic: 4 hours Lightly serviceable: 1 day Fully serviceable: 2 days Volume Change (ASTM C531): 28 days: 0.036% Pull-Out Strength (on concrete) (CSA-A23.2-6B) 10 mm (0.39 in) thickness: 2.50 MPa (362.6 psi) (substrate failure) 25 mm (1 in) thickness: 2.30 MPa (333.6 psi) (substrate failure) Application Instructions Surface Preparation & Priming: Ensure the substrate is clean, dry, and stable. Remove any existing treatments, coatings, sealers, or contaminants. Use mechanical methods like shotblasting, sandblasting, or water-jetting to create a fine, open-textured surface. Surface defects should be repaired with a suitable Sika mortar before priming. All loose materials should be removed with a vacuum before applying Sika® Level-01 PrimerCA. Mixing: Add 4.25 L (1.12 US gal.) of potable water to a mixing container and gradually add the powder (25 kg/55 lb). Mix using a low-speed electric mixer (300–400 rpm) for at least 3 minutes until uniform. Let the mixture sit until air bubbles are mostly dispersed. Application: Pump: Use a floor screed mixer and pump, adjusting water to achieve a flowable consistency (4.25 L per 25 kg). After pumping, spread using a trowel or pin screed rake, then spike-roll in two directions to remove marks and air. Manual: Pour the mixture onto the pre-primed surface and spread with a trowel or pin screed rake, then spike-roll in two directions to remove marks and air. Curing: Sikafloor® Level-25CA must be air-cured. Do not use wet curing or curing compounds. Clean Up: Clean tools and equipment with water. Hardened material may need to be mechanically removed. Limitations Protect the stored material from moisture and humidity. The product should be conditioned to temperatures between 18°C and 29°C (65°F and 84°F) before mixing and installation. Do not exceed the recommended water dosage. Protect from condensation and water for at least 24 hours after application. Not suitable for slopes exceeding 0.5%. Not intended for aesthetic finishes. For interior use only. Mechanical preparation is required before overcoating with Sikafloor® resins or additional layers. Ensure moisture content meets requirements when overcoating.
