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RLA TruLevel TuffTop: A Technical Overview
RLA TruLevel TuffTop is a premium cementitious self-levelling compound designed for rapid floor preparation and smoothing. Suitable for thicknesses ranging from 3mm to 30mm, it delivers outstanding flow characteristics and mechanical strength with a compressive strength exceeding 40 MPa at 28 days. It supports foot traffic after just 3–4 hours and can be overlaid with floor finishes like timber, carpet, vinyl, and tiles after 18–24 hours. With a flexural strength of >8 MPa and surface hardness >50 N/mm², it’s suitable for use in commercial and industrial areas, including underfloor heating and heavy wheel load zones. When used as a wear surface, coatings can be applied after 48 hours. The product complies with EN 13813 classification CT-C40-F8.
Core Features & Specifications
- Levels floor surfaces from 3mm up to 30mm in one pour, reducing labour and layering
- Walk-on dry in just 3–4 hours at 23°C, speeding up construction schedules
- High compressive strength >40 MPa after 28 days — suitable for high-load and commercial traffic
- Compatible with timber, tile, vinyl, carpet and linoleum floor finishes
- Self-levelling, pumpable and easy to apply — reduces manual screeding effort
- Suitable for underfloor heating and wheelchair traffic areas
- EN 13813 classification: CT-C40-F8 — proven performance and compliance
The RLA TruLevel TuffTop Advantage
- Minimises downtime — accepts coatings after 48 hours and finishes after 18–24 hours
- Improves substrate strength and durability in high-traffic or point-load zones
- Versatile for internal and external use, including exposed wear-surface areas
- Reliable under Australian climate conditions (from +5°C to +35°C)
- Works seamlessly with RLA primers, moisture seals, and adhesives
Best Practices: Do's & Don'ts
Do
- Prime porous substrates with diluted RLA Universal Primer
- Use mechanical prep (e.g. shot blasting) on contaminated or sealed concrete
- Mix with 3.8–4.0 L clean water per 20kg bag for best consistency
- Apply at minimum 15mm thickness in high-traffic areas
Don't
- Don't apply over substrates with active moisture or rising damp
- Don't use solvents or acid etching during surface prep
- Don't overwater — may cause bleeding, reduced bond strength, or delamination
- Don't apply over expansion joints — reflective cracking may occur
Applications in Practice: Trade Scenarios
For Tilers (On-site Applicator): Smoothing Over Uneven Subfloors
The Engineering Challenge
Lippage, uneven screeds or inconsistent slab levels increase tile cracking risk and slow install time. Traditional patching compounds are slow and inconsistent over large areas.
The System-Based Solution with RLA TruLevel TuffTop
Apply TuffTop from 3–30mm in one pour to achieve an even, walkable surface in 3–4 hours. Compatible with most tile adhesives. Coverage approx. 2.4m² per 20kg at 5mm. Ideal for preparing commercial bathrooms or high-traffic foyers.
Best Practice Note
Always use RLA Universal Primer and ensure floor moisture is within spec. Apply with a stand-up spreader or gauge rake for even flow.
For Specifiers (Engineer/Architect): Commercial Underlayment for Vinyl or Timber
The Engineering Challenge
Specifiers need predictable drying, compatibility with various floor finishes, and assurance the levelling system won’t telegraph through vinyl or timber planks — particularly in healthcare or retail projects.
The System-Based Solution with RLA TruLevel TuffTop
TuffTop allows finishes to be installed after 18–24 hours (vinyl/carpet) or 24 hours (timber), with a flatness tolerance supporting modern LVT or engineered board installs. 28-day compressive strength of >40 MPa ensures performance under trolleys and foot traffic.
Best Practice Note
Specify minimum 5mm thickness for timber installs and confirm compatibility with floor adhesives. Use RLA Moisture Seal for high-moisture substrates prior to install.
Performance Benchmark: RLA TruLevel TuffTop vs. Standard Alternatives
| Metric | RLA TruLevel TuffTop | Standard Alternative | Advantage |
|---|---|---|---|
| Compressive Strength (28 days) | > 40 MPa Very High | 25–30 MPa | Superior load resistance and wear tolerance |
| Walk-on Time | 3–4 hours Fast | 6–12 hours | Reduces downtime and increases job turnover |
| Floor Finish Ready | 18–24 hours Quick-Set | 2–3 days | Accelerates project completion |
| Thickness Range | 3–30 mm Versatile | 5–15 mm | Wider range in a single product |
Frequently Asked Questions
How thick can I apply RLA TruLevel TuffTop in a single pour?
RLA TruLevel TuffTop can be applied from 3mm to 30mm in a single coat without additional layers. For applications above 30mm, consult RLA technical staff for guidance on build-up or alternative products.
What is the walk-on time for RLA TruLevel TuffTop?
TruLevel TuffTop sets rapidly — surfaces are typically walkable within 3 to 4 hours at 23°C. This makes it ideal for fast-tracked commercial or industrial projects where time is critical.
Can RLA TruLevel TuffTop be used as a finished wear surface?
Yes, but only when coated. TuffTop can serve as a wear surface in commercial zones if a suitable epoxy, acrylic, or urethane coating is applied. Minimum thickness must be 5mm for wear surface use, and coatings should be applied after 48 hours.
Is RLA TruLevel TuffTop compatible with timber flooring?
Yes. Timber floor coverings can be installed over TruLevel TuffTop after 24 hours, provided the levelling layer is a minimum of 5mm and moisture levels are compliant. Always use RLA Universal Primer for optimal bond.
What primer should I use before applying RLA TruLevel TuffTop?
Use RLA Universal Primer. For porous substrates, dilute 1:2 with clean water. For non-porous surfaces, apply neat (undiluted). Let dry to a tack-free transparent film before applying the levelling compound.
Can RLA TruLevel TuffTop be used with underfloor heating systems?
Yes. RLA TruLevel TuffTop is suitable for use over underfloor heating installations. Ensure the heating system is turned off 24 hours prior and remains off for at least 7 days after application to allow proper curing.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Levelling uneven internal concrete slabs | Achieves a smooth, flat surface from 3–30mm in one pour | Tilers, Builders, Flooring Installers |
| Underlayment for vinyl, carpet, or linoleum | Fast-setting and compatible with adhesives; ready for finishes in 18–24 hours | Flooring Contractors, Fitout Teams |
| Base levelling before timber floor installations | Maintains integrity under timber; allows installation after 24 hours | Timber Floor Installers, Builders |
| Wear-surface topping in commercial zones | Forms a hard-wearing surface when overcoated; supports wheel traffic and high loads | Commercial Contractors, Asset Maintenance |
| Smoothing over liquid membranes or ceramic tile underlays | Bonds securely to non-porous surfaces with correct primer; bridges inconsistencies | Waterproofers, Remedial Specialists |
Applying RLA TruLevel TuffTop: Enhanced Protocols & Best Practices
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Surface Preparation
All substrates must be clean, dry, sound, and compliant with Australian Standards. Remove all contaminants including oils, wax, curing compounds, and adhesive residues.
Porous Substrates
Dilute RLA Universal Primer 1:2 with clean water. Apply one or two coats as needed. Allow to dry tack-free.
Non-Porous Substrates
Mechanically abrade if necessary. Apply neat RLA Universal Primer. Let dry completely before proceeding.
Timing: Primer should dry to a clear, tack-free film (approx. 2 hours at 23°C).Pro Tip: Always test moisture levels before application. Use RLA Moisture Seal if levels exceed specification. -
Mixing
Mix 20kg of RLA TruLevel TuffTop with 3.8–4.0L of clean water using a low-speed mechanical mixer. Add powder to water slowly.
Drill and Paddle Method
Mix for 3 minutes to achieve a lump-free consistency. Avoid overwatering to maintain strength.
Pump Mixing
For large areas, use a continuous mixing pump suited to self-levelling compounds.
Timing: Use within 5 minutes of mixing at 23°C. Plan for uninterrupted application.Pro Tip: Keep backup mixes ready for large surfaces to maintain wet edge and flow. -
Application
Pour or pump the compound onto the primed substrate. Spread evenly using a gauge rake, screed bar, or trowel to required thickness.
Manual Spreading
Use a stand-up spreader or trowel to move product quickly. Maintain continuous wet edge for large areas.
Pumping
Use suitable pumping equipment for areas over 50m². Ensure team coordination to avoid material setting mid-flow.
Timing: Application must be completed within open time of 30 minutes at 23°C.Pro Tip: Do not rework or retemper product once initial set begins — discard any partially set mix. -
Drying & Next Steps
Allow to set and harden before foot traffic. Proceed with coatings or floor coverings after appropriate cure time based on site temperature.
Foot Traffic
Allow minimum 3–4 hours at 23°C before walking on surface.
Floor Coverings
Vinyl, carpet, and tiles: after 18–24 hours. Timber: after 24 hours. Epoxy coatings: after 48 hours.
Timing: Always check site conditions — cold weather may extend drying time.Pro Tip: Don’t apply floor finishes until surface is fully dry. For wear-surface use, minimum thickness is 5mm.
Limitations & Safety
Product Limitations
Do not apply over substrates with active rising damp. Use RLA Moisture Seal where moisture levels exceed tolerance.
RLA Moisture Seal
Do not use in areas exposed to water pooling unless overcoated with a suitable membrane or coating.
RLA waterproofing membranes
Not designed for application over expansion joints or structural movement cracks.
Do not re-temper or add water to partially set product — discard and remix fresh batch.
Extended drying times may occur in cold conditions below 10°C — monitor ambient temperature.
Safety & Handling Requirements
Personal Protective Equipment
Wear chemical-resistant gloves, safety goggles, and long-sleeve clothing to prevent skin and eye contact. Use a P2 dust mask when mixing.
Ventilation Requirements
Use in well-ventilated areas. For internal use, ensure cross-flow ventilation or mechanical extraction is available during mixing and placement.
Fire & Handling Precautions
Product is non-flammable, but avoid ignition sources during storage of packaging. Store off ground in a dry, cool location. Avoid skin contact when handling bags.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if present. Continue rinsing. Seek medical attention if irritation persists.
Skin:
Remove contaminated clothing. Wash skin thoroughly with soap and water. Do not reuse clothing until washed.
Inhaled:
Move to fresh air. Keep at rest in a comfortable position. Seek medical advice if symptoms persist.
Swallowed:
DO NOT induce vomiting. Rinse mouth. Give water to drink and contact Poisons Information Centre immediately.
Seek medical attention immediately in all cases of serious exposure.
RLA TruLevel TuffTop Application Guide
Standard Concrete (Internal)
Surface Preparation
Ensure surface is dry, clean, and free from curing compounds, oil, wax, or adhesives. Mechanically prepare using diamond grinding or shot blasting if contaminated. Moisture content must be within allowable limits.
Primer Requirements
Primer required for optimal bond
Use diluted RLA Universal Primer (1 part primer : 2 parts water). Apply one coat with a roller and allow to dry tack-free.
RLA Universal PrimerPorous Substrates (Screeds, Cement Sheet)
Surface Preparation
Clean thoroughly. Highly porous surfaces may require two primer coats to avoid pinholing. Surface must be free of loose particles and dust.
Primer required for absorbent substrates
Apply RLA Universal Primer diluted 1:2 with clean water. For very porous screeds, apply a second coat once the first is dry.
RLA Universal PrimerNon-Porous Substrates (Ceramic Tiles, Burnished Concrete)
Surface Preparation
Mechanically roughen surface to open pores and remove coatings, sealers, or curing compounds. Ensure substrate is dry and free of contaminants.
Primer required – apply neat
Apply neat RLA Universal Primer (undiluted). Allow to cure fully to a tack-free transparent film before application.
RLA Universal PrimerSubstrates with High Moisture (Green Slabs)
Surface Preparation
Verify moisture content exceeds limits. Mechanically clean and roughen surface. Remove all dust and loose debris before moisture seal application.
Moisture barrier required
Apply RLA Moisture Seal as per TDS instructions. Once cured, apply RLA Universal Primer over the sealed surface prior to levelling.
RLA Moisture Seal + RLA Universal PrimerOld Adhesive Residue (After Removal)
Surface Preparation
Remove all loose adhesive mechanically. Clean thoroughly. Conduct moisture testing and ensure a sound, contaminant-free surface is achieved.
Primer recommended for optimal bond
Apply neat RLA Universal Primer once the surface is properly prepared. Ensure full coverage to reduce risk of pinholing or bond loss.
RLA Universal Primer
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