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Price Per Unit: $47.17
Price Per Box: $42.45
Mapei Lamposilex: A Technical Overview
Lamposilex is a pre-blended hydraulic binder based on high-strength cements and special admixtures. Mixed at 100:28 by weight (powder:water), it forms a plastic-thixotropic paste that adheres to damp mineral substrates and can be hand-moulded into cavities—even on vertical surfaces—without formwork. It sets in approximately 1½ minutes at +20 °C and develops high early strength (e.g., ~17 MPa compressive at 30 minutes), enabling rapid control of active leaks and quick return to service. Once cured it is waterproof, water-repellent and suitable for contact with potable water in systems requiring AS/NZS 4020 compliance.
~1.5 min
Setting time at +20 °C (rapid control of active leaks)
Core Features & Specifications
- Ultra-fast set: approx. 1½ minutes at +20 °C — stop leaks immediately and reduce downtime.
- High early strength: ~17 MPa compressive at 30 min; ~32 MPa at 24 h; up to ~46 MPa at 28 d — secure, durable sealing.
- Plastic-thixotropic paste — hand-mouldable “cork” application into cracks and holes, including vertical surfaces.
- Waterproof and water-repellent after cure — reliable long-term moisture barrier.
- Suitable for potable water systems — certified to AS/NZS 4020:2018.
- Simple 100:28 (powder:water) mix by weight; ~2.5:1 by volume — consistent results on site.
- Consumption: ~1.8 kg fills 1 dm³ cavity — plan materials accurately.
- Minimum application temperature: +5 °C; pot life ~1 minute — prepare small batches.
- Packaging: 1 box with 4 × 5 kg bags — practical for staged works.
The Mapei Lamposilex Advantage
- Stops active leaks under pressure — control ingress fast and protect adjacent finishes.
- High early strength — move to the next stage sooner and keep programmes on track.
- Potable-water suitability — confidence for tanks, wet areas and reticulation nodes.
- Straightforward methods — dovetail cavity prep, hand-placed “cork,” hold 2–3 min, trim.
- Performs in real site conditions — applies to damp substrates; thixotropy resists slumping.
Proactive Troubleshooting
Scenario: Inadequate cavity preparation (no dovetail, loose fines left)
Potential Outcome: Poor key/lock-in and debonding, resulting in renewed leakage and call-backs.
Adheseal Best Practice: Dovetail to approx. 20 mm × 20 mm with wider section inside, remove incoherent material and dust, then thoroughly wet and bring to SSD (saturated surface-dry) before placement.
Scenario: Mixing too much material for the ~1 minute pot life
Potential Outcome: Premature stiffening, poor compaction and weak interfaces.
Adheseal Best Practice: Mix small, frequent batches with very cold water in warm weather; place immediately and hold 2–3 minutes on active leaks.
Applications in Practice: Trade Scenarios
For Waterproofers (On-Site Applicator): Active leak through slab/wall junction
The Professional's Challenge
An active seep under hydrostatic pressure threatens membrane works and programme timing. You need immediate control to proceed.
The Adheseal Solution
Dovetail the joint to ~20 mm × 20 mm, clean, wet to SSD. Mix Lamposilex 100:28 (or 2.5:1 by volume). Hand-mould a plug and force into the junction; hold firm for 2–3 min until set. Keep surface damp for 15–20 min when sealing rigid joints.
Best Practice Note
In warm Australian climates, shade materials and use very cold water to maintain working time.
For Remedial Contractors (Business Owner/Operator): Emergency leak in elevated tank
The Professional's Challenge
Unscheduled leakage risks asset damage and downtime costs; potable water compliance may apply.
The Adheseal Solution
Open to a dovetail, clean and wet to SSD. Prepare small batches and apply as a hand-formed “cork,” holding 2–3 min. Lamposilex is suitable for potable water applications complying with AS/NZS 4020.
Best Practice Note
Sequence multiple leaks from the top down to avoid re-pressurising lower plugs during installation.
For Builders (Specifier/Engineer): Rigid crack sealing prior to finishes
The Professional's Challenge
Moisture migration through fine cracks jeopardises finish adhesion and warranty compliance.
The Adheseal Solution
Enlarge and dovetail to ~20 mm, clean thoroughly and wet to SSD. Work Lamposilex into the cavity immediately after mixing for a dense, waterproof seal with high early strength.
Best Practice Note
After set, trim and mechanically dress the surface to profile before subsequent layers.
Frequently Asked Questions
Can Lamposilex be used to stop pressurised leaks in vertical surfaces?
Yes. The mix forms a plastic-thixotropic paste that can be hand-moulded into cracks and holes on vertical substrates. Hold the “cork” in place for 2–3 minutes until set for reliable sealing under pressure.
Is it suitable for potable water applications?
Yes. Once cured, Lamposilex is suitable for use in potable water and is certified to AS/NZS 4020:2018, making it appropriate for tanks and reticulation nodes that require contact-water compliance.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Instantly stopping active water leaks (including under pressure) | Ultra-fast set (~1.5 min) and high early strength control ingress rapidly | Waterproofers, Remedial Contractors |
| Sealing rigid wall–slab junctions | Dense, waterproof plug; damp-cure practice minimises shrink and improves seal | Builders, Waterproofers |
| Waterproof sealing of cracks and holes | Thixotropic, hand-mouldable paste for verticals; reliable mechanical key via dovetail | Builders, Remedial Contractors |
| Potable water infrastructure interfaces | Suitable for contact with potable water (AS/NZS 4020:2018) | Plumbers, Asset Maintenance |
Applying Mapei Lamposilex: Enhanced Protocols & Best Practices
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Surface Preparation
Dovetail cavities (~20 mm × 20 mm), remove loose material and dust, wet to SSD.
Dovetail Opening
Cut with the wider section inside to create mechanical key and resist pressure blow-out.
Moisture Conditioning
Thoroughly pre-wet; remove free water with compressed air or sponge to achieve SSD.
Timing: Prepare just ahead of mixing to exploit the ~1 minute pot life.Pro Tip: Start with the highest leak point when multiple leaks are present to avoid re-pressurising lower repairs. -
Mixing
Mix 100:28 by weight (2.5:1 by volume) to a smooth, lump-free paste.
Manual Mix
Add powder to water while stirring with trowel until uniform. Prepare small batches only.
Warm Weather Control
Keep material out of sun; use very cold water to maintain working time.
Timing: Pot life ~1 minute at +20 °C; place immediately after mixing.Pro Tip: In cool conditions, store materials warm and use ~+20 °C water to avoid delayed set. -
Placement & Finishing
Hand-mould a plug and force into the cavity; hold 2–3 minutes until set, then trim excess.
Active Leaks
Apply from the top down when multiple leak points exist; maintain firm pressure during initial set.
Rigid Joints
Pack the mix tight with a trowel/float; keep surface damp for the first 15–20 minutes.
Timing: Initial set ~1.5 min at +20 °C; early high strength allows rapid return to works.Pro Tip: After hardening, dress the repair mechanically to match profile before membranes/finishes.
Limitations & Safety
Product Limitations
Do not add lime, cement or gypsum to Lamposilex.
Minimum application temperature +5 °C; pot life ~1 minute at +20 °C — prepare small batches only.
In warm weather, keep material out of direct sun and use very cold water. In low temperatures, use ~+20 °C water and store materials in a heated room.
Safety & Handling Requirements
Personal Protective Equipment
Wear safety glasses and suitable gloves; avoid skin and eye contact. Use protective clothing to minimise dust exposure during cutting and cleaning.
Ventilation Requirements
Ensure adequate ventilation during mixing and placement, particularly in confined spaces such as basements and tanks.
Fire & Handling Precautions
Non-flammable mineral powder. Handle bags to avoid damage; store dry and indoors. Keep out of reach of children.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing and seek medical advice if irritation persists.
Skin:
Wash with soap and water. Remove contaminated clothing. Seek medical attention if irritation occurs.
Inhaled:
Move to fresh air and rest in a comfortable position. Seek medical attention if symptoms persist.
Swallowed:
Rinse mouth. Do not induce vomiting. Seek medical advice immediately.
Seek medical attention immediately in all cases of serious exposure.
Mapei Lamposilex Application Guide
Concrete & Masonry
Surface Preparation
Enlarge cracks/holes to a dovetail (~20 mm × 20 mm) with the wider part internal. Remove degraded/incoherent material and dust. Thoroughly wet substrate and bring to SSD (saturated surface-dry) before placement.
Primer Requirements
No primer typically required
Apply immediately after mixing; compact firmly. Keep surface damp for 15–20 minutes when sealing rigid joints.
Rigid Wall–Slab Joints
Surface Preparation
Open the junction to a dovetail profile, clean thoroughly, wet to SSD. Sequence works top-down where multiple leaks are present.
Primer Requirements
No primer typically required
Place Lamposilex immediately after mixing and hold in place for 2–3 minutes on active leaks; then keep surface damp for 15–20 minutes.
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