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RLA Safe2O: A Technical Overview
RLA Safe2O is a non-hazardous, one-component, liquid-applied waterproofing membrane based on advanced Silyl Modified Polymer (SMP) technology. Its solvent- and isocyanate-free formulation makes it safer for applicators while delivering Class III performance to AS 4858 and AS 4654.1. Green Tag certified for environmental assurance, Safe2O provides outstanding adhesion, flexibility, and water resistance. The unique formulation allows single-coat horizontal applications at 1.2 mm WFT, reducing labour and material use compared to multi-coat systems.
Core Features & Specifications
- SMP technology — solvent and isocyanate free for safer use.
- Green Tag certified — verified environmental performance.
- Class III waterproofing to AS 4858 & AS 4654.1 — internal & external compliant.
- Single coat on horizontal surfaces — 1.2 mm WFT saves time and labour.
- Flexible and elastomeric — >300% elongation for movement accommodation.
- In-built root inhibitor — suitable for planter boxes and subterranean use.
The RLA Safe2O Advantage
- Reduces application stages — single coat for horizontal saves time.
- Safer for applicators — low hazard profile without performance compromise.
- Versatile — above ground and selected below-ground applications.
- Durable — tough, elastomeric finish withstands environmental stress.
Proactive Troubleshooting
Scenario: Applying over unprimed substrate
Potential Outcome: Poor adhesion, potential membrane delamination.
Adheseal Best Practice: Always prime according to substrate type — porous, non-porous, or damp — with the correct RLA primer.
Scenario: Inadequate film build
Potential Outcome: Reduced waterproofing capacity and possible failure under hydrostatic load.
Adheseal Best Practice: Use a wet film thickness gauge to confirm WFT of 1.2 mm for single coat horizontal or 0.6 mm per coat for verticals.
Applications in Practice: Trade Scenarios
For Waterproofers (Specifier/Installer): Retaining Wall Waterproofing
The Professional's Challenge
Preventing water ingress and root penetration in backfilled retaining wall situations.
The Adheseal Solution
Apply Safe2O in two vertical coats at 0.6 mm WFT each (total 1.2 mm DFT), incorporating a root inhibitor for long-term performance.
Best Practice Note
Backfill after 72 hours cure, protecting membrane with suitable board to avoid damage.
For Landscapers (On-Site Applicator): Planter Box Waterproofing
The Professional's Challenge
Delivering durable, root-resistant waterproofing in planters under constant moisture exposure.
The Adheseal Solution
Prime substrate, install bond breaker at junctions, and apply Safe2O at 1.2 mm WFT (horizontal) in a single coat, ensuring full coverage.
Best Practice Note
Allow 48 hours before screeding and ensure drainage provisions are functional before planting.
Frequently Asked Questions
Can RLA Safe2O be used externally?
Yes — it is compliant to AS 4654.1 for external above-ground waterproofing, including decks, balconies, and planter boxes.
Is it safe for potable water contact?
No — Safe2O is not certified for potable water storage. For drinking water applications, use RLA Moisture Seal (AS 4020 compliant).
Can I apply tiles directly onto Safe2O?
Yes — once fully cured, it can be tiled using RLA polymer-modified adhesives. Sand-seeding while wet can improve mechanical key for screeds or adhesives.
Do I need a bond breaker?
Yes — bond breakers must be installed at all substrate junctions and movement joints before membrane application.
Applications & Benefits
| Application | Key Benefit | Primary Trades |
|---|---|---|
| Internal wet areas | Compliant Class III membrane | Waterproofers, Builders |
| Balconies & decks | Durable, flexible external waterproofing | Waterproofers |
| Planter boxes | Root inhibitor prevents damage | Landscapers |
| Retaining walls | Resists moisture ingress in backfilled walls | Waterproofers |
Applying RLA Safe2O: Enhanced Protocols & Best Practices
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Surface Preparation
Clean substrate, prime as required, install bond breakers and reinforcement at junctions.
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Application
Apply by roller, brush, or trowel to achieve required WFT — 1.2 mm in single coat (horizontal) or 0.6 mm per coat (vertical).
Recoat Time: 4 hours at 23°C / 50% RH.
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Curing
Allow 48 hours before screeding or tiling. Protect from rain for first 24 hours.
Limitations & Safety
Limitations
- Do not apply if rain is expected within 24 hours.
- Not suitable for permanent immersion or potable water storage.
- Apply only within 10°C–35°C.
Safety & Handling
Wear gloves and safety glasses. Use in well-ventilated areas. Wash skin with soap and water after contact.
RLA Safe2O Application Guide — Substrate Preparation
Concrete, Screed, Render
Preparation
Clean, remove laitance, and ensure sound substrate. Cure new concrete for 28 days, screeds/renders for 7 days.
Primer
Prime with RLA Moisture Seal if damp, or RLA Universal Primer if dry.
Compressed & Fibre Cement Sheeting
Ensure sheets are installed as per manufacturer guidelines. Prime with RLA Universal Primer.
Timber (PAA Structural / Marine Plywood)
Dry, clean, and secure. Prime with RLA Universal Primer. Seal edges and penetrations before membrane.
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