For leveling thick, uneven sections on new or existing internal concrete substrates, Aftek TruLevel BulkFill UT provides a high-build, rapid-hydrating underlayment that pours from 3mm up to 70mm in a single application. It develops a smooth, highly mechanically resistant surface ready to accept carpet, carpet tiles, ceramic tiles, and floating floor finishes.
Aftek TruLevel BulkFill UT is formulated with rapid-setting cement, graded silica sand, resins, and special additives to flow easily and self-level over large height variations. The compound cures rapidly to achieve a compressive strength of over 30 N/mm² at 28 days, ensuring a stable, durable foundation under heavy foot traffic. It is also compatible with under-floor heating systems, provided the installation aligns with the heating manufacturer's specific recommendations.
Aftek TruLevel BulkFill UT is suitable for preparing internal floors before laying final coverings. Compatible substrates and applications include:
Substrates must be dry, sound, clean, and free of wax, grease, oil, polishes, old adhesive, and curing compounds. Mechanical preparation, such as shot blasting or diamond grinding, must be used to remove surface sealers and provide a clean, open porous profile. Vacuum all dust and loose debris before priming.
To determine substrate porosity, perform a water drop test using a puddle the size of a 10-cent coin. If the water absorbs in less than 1 minute, the subfloor is porous; if the puddle remains, it is non-porous. Apply RLA Universal Primer accordingly, ensuring non-porous surfaces are primed neat and allowed to dry to a tack-free transparent film (approximately 2 hours at 23°C) before pouring the leveler. Mix the powder into the water at low speed for 3 minutes using a drill and mixing paddle until a lump-free consistency is achieved.
No, RLA TruLevel BulkFill UT is not suitable for direct stick timber flooring applications. This limitation is noted to prevent potential issues with bond failure or an unstable subfloor.
RLA TruLevel BulkFill UT can be applied in a single coat from 3mm up to 70mm thick. This high-build capability is designed to efficiently correct significant substrate variations.
Most floor coverings, including carpet, carpet tiles, ceramic tiles, and floating floors, can be installed after 24-36 hours. For vinyl or rubber flooring, a further 2-3mm coat of TruLevel EconoPro or TuffTop, applied over primed TruLevel BulkFill UT, is recommended.
No, RLA TruLevel BulkFill UT is for internal use only. It is not formulated to withstand external weather exposure, which could compromise its performance and durability.
| Application | Key benefit | Primary trades |
|---|---|---|
| Levelling internal concrete (3-70mm) | Corrects significant slab deviations in a single pour, avoiding multiple applications. Provides a robust base with compressive strength exceeding 30 N/mm² at 28 days. | Concreters, Builders, Flooring installers |
| Underlay for carpet, carpet tiles, ceramic tiles | Creates a smooth, even surface (CT-C30-F6 classified) ready for most floor coverings within 24-36 hours, accelerating project timelines. | Tilers, Flooring installers |
| Underlay for floating floor finishes | Achieves the critical flatness required for floating floors, preventing rocking and uneven wear, and is ready for installation within 24-36 hours. | Flooring installers, Builders |
| Encapsulating under-floor heating systems | Provides a solid, level bed over heating systems, ensuring efficient heat transfer and protection, capable of handling thicknesses up to 70mm. | Electricians, Plumbers, Builders |
| Preparing for vinyl or rubber flooring | Forms a strong, deep-fill base layer. Though requiring an intermediate levelling compound, this establishes the necessary bulk level efficiently. | Flooring installers |
Confirm the slab is clean, dry and sound. Use a 10-cent water drop test to determine porosity and set the priming method.
Porous: Universal Primer 1:2 (primer:water). Non-porous: Universal Primer neat to a clear, tack-free film (~2 h at 23 °C).
Per 20 kg, add 3.6–3.8 L clean water; mix ~3 min to a lump-free blend. Do not over-water.
Pour or pump and spread with gauge rake/stand-up spreader or trowel. Apply 3–70 mm in one coat; working time ~30–40 min at 23 °C.
Walk in 3–4 h; install most coverings after 24–36 h at 23 °C. For vinyl/rubber, prime neat then skim 2–3 mm with TruLevel EconoPro or TuffTop.
DANGER
Causes skin irritation. Causes serious eye damage. May cause an allergic skin reaction. May cause cancer. May cause respiratory irritation. Causes damage to organs through prolonged or repeated exposure.
Wear safety glasses with side shields or chemical goggles, suitable protective gloves (polychloroprene, nitrile rubber, or butyl rubber), and protective clothing including overalls and a PVC apron. Use suitable respiratory protection, such as a Type AX-P Filter, to avoid breathing dust.
Use only in well-ventilated areas. Prevent concentration in hollows and sumps.
Store in original, securely sealed containers in a cool, dry area, protected from environmental extremes. Store away from incompatible materials and foodstuff containers. Dispose of contents and container in accordance with local regulations. Do not pour mixed product down drains to avoid blockages.
Proper substrate preparation and priming are critical for ensuring optimal adhesion and long-term performance of RLA TruLevel BulkFill UT.
Surface prep: Substrates must be dry, sound, and clean, free of wax, grease, oil, old adhesive, curing compounds, and any other contaminants. Mechanically prepare the surface using shot blasting or diamond grinding to achieve a roughened, open-porous profile. Vacuum thoroughly to remove all loose material and dust. Do not use solvents or acid etching.
Primer: Required. Prime all concrete with RLA Universal Primer. For porous concrete, dilute primer 1:2 with clean water. For non-porous (e.g., burnished concrete), apply RLA Universal Primer neat. Allow primer to dry completely (approx. 2 hours at 23°C) until it forms a tack-free transparent film.
Surface prep: Ensure tiles are clean, sound, and free from contaminants. Mechanically remove any coatings, curing, or sealing compounds. For extremely non-porous surfaces, a light grind or sand is recommended to enhance adhesion.
Primer: Required. Apply RLA Universal Primer neat (undiluted). Allow primer to dry completely (approx. 2 hours at 23°C) until it forms a tack-free transparent film before application.
Surface prep: The membrane must be clean, fully cured, and free from any contaminants or residues that could impair adhesion. Consult the membrane manufacturer for compatibility if unsure.
Primer: Required. Apply RLA Universal Primer neat (undiluted). Allow primer to dry completely (approx. 2 hours at 23°C) until it forms a tack-free transparent film before application.
| Property | Value |
|---|---|
| Colour | Grey |
| Bulk Density | 1.34 kg/dm³ |
| Wet Density | 2.1 kg/dm³ |
| Packaging | 20 kg bag |
| Mixing Ratio | 3.6-3.8 litres of water per 20 kg bag |
| Open Time | 30-40 minutes |
| Setting Time | 2-3 hours |
| Application Temperature Range | +5°C to +35°C |
| Maximum Thickness | 70 mm |
| Foot Traffic | 3-4 hours |
| Waiting Time Before Subsequent Bonding | 24-36 hours |
| pH of Mix | Approximately 12 |
| Coverage | Approximately 2.4 m² per 20 kg bag at 5 mm thick |
| Classification | CT-C30-F6 (EN 13813) |
| Flexural Strength (28 days) | >6 N/mm² (EN 13892-2) |
| Compressive Strength (28 days) | >30 N/mm² (EN 13892-2) |
| Abrasion Resistance (28 days) | ≤150 g (EN 12808-2) |
| Surface Hardness (28 days) | >50 N/mm² (EN 13892-6) |
| Shelf Life | 12 months |
Here are some common examples on where RLA Aftek TruLevel BulkFill UT used by our customers.
