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Facing an uneven internal concrete or timber floor that needs a fast, flexible, and robust levelling solution, even over underfloor heating or where subfloor movement is a concern? TruLevel Flexi delivers a smooth, durable base, quickly preparing surfaces for final finishes.
TruLevel Flexi is a rapid-drying, fibre-reinforced, flexible self-levelling compound. It is engineered for internal concrete and timber substrates, providing a robust, high-performance surface that accommodates movement. This formulation prevents the frustration and cost of rigid screeds cracking over dynamic timber subfloors, or the long delays associated with slow-drying alternatives. It ensures a stable and durable base for a wide range of floor coverings.
TruLevel Flexi is designed for straightforward application following proper surface preparation. It mixes with clean water using a drill and paddle, requiring a thorough, lump-free consistency achieved over approximately three minutes. The mixed material has a 15-minute open time, allowing sufficient window for application with a gauge rake, stand-up spreader, or trowel. For larger areas, it is suitable for pumping. Tools clean immediately with water.
TruLevel Flexi serves as a critical intermediate layer in internal flooring systems. Its performance relies on correct subfloor preparation and priming. Always prime the prepared substrate with RLA Universal Primer to ensure optimal adhesion and prevent pinholes. For concrete subfloors exhibiting high moisture levels, an application of RLA Moisture Seal must precede priming and levelling, creating a complete and robust system.
Classified as CT-C20-F7 according to EN 13813, TruLevel Flexi demonstrates compliance with European standards for screed materials, ensuring consistent compressive and flexural strength. Its EC1 Plus VOC rating signifies very low emissions, supporting healthy indoor air quality.
Unlike standard rigid self-levelling compounds, RLA TruLevel Flexi's fibre-reinforced and enhanced flexible formulation is engineered to accommodate movement in both timber and concrete subfloors without cracking, ensuring a stable and durable base. When the primary need is for a highly flexible, movement-accommodating layer, especially over timber or underfloor heating, TruLevel Flexi is the specific choice. For jobs requiring a bulk fill up to 80mm with rapid strength gain, consider RLA Aftek TruLevel BulkFill UT Self-Levelling Compound. If the focus is on achieving an ultra-smooth, fine finish, typically from feather-edge up to 10mm, RLA TruLevel Fine Finish Self-Levelling Compound offers a distinct advantage.
Yes, RLA TruLevel Flexi is specifically formulated for timber substrates. Its enhanced flexibility and fibre reinforcement help manage substrate movement, reducing the risk of cracking in the levelling compound and subsequent floor coverings.
Most floor coverings like vinyls, carpets, or ceramic tiles can be installed after 12 hours at 23°C. For timber flooring, allow 24 hours. These rapid cure times support faster project completion.
No, RLA TruLevel Flexi is strictly for internal use only. It should not be applied in areas with rising damp or over expansion joints, as these conditions can lead to product failure and reflective cracking.
All substrates require RLA Universal Primer. Porous surfaces use a 1:2 primer-to-water mix, while timber and non-porous surfaces (like burnished concrete or ceramic tiles) require neat, undiluted primer. Always ensure the primer is dry and tack-free before applying the levelling compound.
| Application | Key benefit | Primary trades |
|---|---|---|
| Levelling timber subfloors | Enhanced flexibility and fibre reinforcement handle timber movement, preventing cracks and floor covering failure. | Flooring installers, Carpenters, Builders |
| Levelling concrete subfloors (internal) | Achieves a smooth, high-strength base from 1-20mm with excellent mechanical resistance, suitable for heavy traffic. | Tilers, Flooring installers, Builders |
| Preparation for various floor coverings | Rapid drying allows vinyl, carpet, and ceramic tile installation after 12 hours, speeding up project timelines. | Flooring installers, Tilers, Renovators |
| Use over underfloor heating systems | Designed to perform over heating systems, tolerating thermal cycling without compromising integrity. | HVAC installers, Builders, Electricians |
Danger: Causes skin irritation. Causes serious eye damage. May cause respiratory irritation. Suspected of causing cancer.
Wear rubber boots, overalls, gloves, chemical goggles, and a respirator. Ensure suitable gloves are used for intermittent contact. Wash hands thoroughly after handling and before eating, drinking, or smoking.
Use only outdoors or in a well-ventilated area. Ensure adequate ventilation to maintain air concentrations below exposure standards. Avoid generating and inhaling dusts.
For poisoning, contact Australia 131 126 or New Zealand 0800 764 766.
Store in a cool, dry, well-ventilated place, out of direct sunlight and away from foodstuffs or incompatible materials. Keep containers tightly closed and store locked up. Dispose of contents/container in accordance with local, regional, national, and international regulations.
Correct subfloor preparation and priming are critical for the long-term performance of RLA TruLevel Flexi and the subsequent floor covering. This guide ensures optimal adhesion and prevents common failures.
Surface prep: Ensure the concrete is dry, sound, and clean, free from contaminants like wax, oil, old adhesive, or curing compounds. Mechanically prepare (shot blast or diamond grind) to achieve a roughened, open-porous surface. Vacuum thoroughly. Minimum subfloor temperature must be 10°C. Do not use solvents or acid etching. Conduct RH and pH readings to relevant Australian Standards. If high moisture is present, apply RLA MOISTURE SEAL first.
Primer: Required. For porous concrete, mix one part RLA Universal Primer with two parts clean water. For burnished or non-porous concrete, apply RLA Universal Primer neat (undiluted). Allow primer to dry completely to a tack-free, transparent film (approx. 2 hours at 23°C).
Surface prep: Timber must be solid, sound, clean, and securely fixed according to manufacturer's instructions and relevant Australian Standards. Re-nail or repair any loose boards. Mechanically remove any wax coatings, sealers, or protective layers that could affect adhesion. Vacuum thoroughly. Ensure adequate subfloor cross-flow ventilation to prevent dampness and check humidity content with a hygrometer.
Primer: Required. Apply RLA Universal Primer in a neat (undiluted) format. Ensure full, even coverage and allow to dry to a tack-free film before applying the levelling compound.
Surface prep: Ensure surfaces are clean, sound, and free from coatings, sealers, or contaminants. Mechanically remove any coatings if present. For extremely non-porous substrates, a light grind or sand is recommended to enhance adhesion. Vacuum thoroughly.
Primer: Required. Apply RLA Universal Primer neat (undiluted) as an even layer. Allow approximately 2 hours at 23°C for the primer to dry to a tack-free, transparent film before application.
| Property | Value |
|---|---|
| Colour | Grey |
| Bulk Density | ~1.00 kg/dm³ |
| Wet Density | ~1.94 kg/dm³ |
| Shelf Life | 12 months |
| Packaging | 20 kg bag |
| VOC GEV Emicode | EC1 Plus |
| Coverage 20kg Bag at 3mm | ~4 m² |
| Mixing Ratio 20kg Bag | 4.6-4.8 litres of water |
| Open Time | 30 minutes |
| Setting Time | 3 hours |
| Application Temperature Range | +5°C to +35°C |
| Maximum Thickness | 20 mm |
| Foot Traffic | 2-3 hours |
| Waiting Time before Vinyl Carpet Bonding | 12 hours |
| Waiting Time before Timber Flooring Bonding | 24 hours |
| pH of Mix | Approximate pH 12 |
| Flexural Strength 1 day | > 2 N/mm² |
| Flexural Strength 3 days | > 3 N/mm² |
| Flexural Strength 7 days | > 5 N/mm² |
| Flexural Strength 28 days | > 7 N/mm² |
| Compressive Strength 1 day | > 8 N/mm² |
| Compressive Strength 3 days | > 11 N/mm² |
| Compressive Strength 7 days | > 15 N/mm² |
| Compressive Strength 28 days | > 20 N/mm² |
| Abrasion Resistance 28 days | ≤ 80 g |
| Surface Hardness 28 days | > 45 N/mm² |
| Classification | CT-C20-F7 (EN 13813) |
Here are some common examples on where RLA True Level Flexi used by our customers.
Flooring
Fast-tracking internal floor preparation for various coverings in commercial or residential areas with heavy loads.
Its rapid curing and high mechanical strength provide a durable, smooth underlayment quickly, minimizing project delays and supporting demanding finishes.
Flooring
Preparing existing internal timber substrates for new resilient or timber floor coverings.
Its fibre-reinforced, flexible formulation effectively accommodates timber subfloor movement, ensuring a stable base and preventing future cracking.
Flooring
Preparing internal concrete or timber floors that incorporate radiant underfloor heating systems.
This flexible, rapid-drying compound withstands thermal expansion and contraction, creating a stable, crack-resistant surface for final finishes.
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