Basilisk Liquid Repair System ER7
Basilisk Liquid Repair System ER7 is a bio-based liquid solution for repairing and sealing cracks in existing concrete structures. Simply spray or pour onto the surface for an effective, non-invasive repair.
The liquid repair system uses limestone-producing micro-organisms to autonomously fill cracks up to 0.8 mm, providing frost protection and a watertight seal without structural modification.
Benefits of Basilisk Liquid Repair System ER7
Quick & Easy Application
Simply spray or pour the liquid repair solution onto the concrete surface. No special equipment or extensive preparation required — ideal for fast turnaround projects.
Crack Filling up to 0.8 mm
The bio-based liquid solution penetrates and fills cracks up to 0.8 mm wide with limestone, sealing them from within for a durable, watertight repair.
Frost Protection
Sealed cracks prevent water ingress, protecting the concrete structure from freeze-thaw damage and extending the service life in cold climates.
Organic Solution
100% bio-based and environmentally friendly. The limestone-producing micro-organisms provide a sustainable, non-toxic repair that is compatible with all concrete types.
Non-Invasive Repair
No need for structural modification or heavy equipment. The liquid system works on the surface level, making it ideal for occupied buildings and sensitive structures.
Autonomous Sealing
Once applied, the bacteria continue to produce limestone whenever moisture enters cracks, providing ongoing autonomous protection over time.
Applications & Opportunities
Basilisk ER7 is ideal for quick, non-invasive repair of cracked concrete surfaces across many structure types.
How to Apply — Basilisk Liquid Repair ER7
Watch the application process and review the step-by-step workflow your crew will follow on site. Switch tabs to compare all three Basilisk products.
Bio-based liquid sprayed or poured onto cracked concrete — seals cracks up to 0.8 mm at up to 500 m²/hour.
Basilisk Liquid Repair ER7 — Step by Step
- 1Clean the surface; remove loose debris from cracks
- 2Spray or pour ER7 directly onto cracked concrete
- 3Liquid penetrates by gravity and capillary action
- 4Limestone-producing bacteria seal cracks and continue to protect on future water ingress
Straight from Basilisk
With Basilisk Liquid Repair System ER7, cracks and leaks in concrete structures repair themselves. Traditional repair methods such as injections are more expensive, more time consuming and more disruptive. ER7 is a bio-based liquid that is simply sprayed or poured onto the cracked concrete surface. It penetrates cracks up to 0.8 mm and uses limestone-producing micro-organisms to seal them autonomously, providing a watertight, frost-protected repair. With the right equipment, a production of up to 500 m² per hour is possible.
Source: basiliskconcrete.com
When to Specify Basilisk Liquid Repair ER7
Use this guide to match the right product to your structure, exposure, and crack profile.
Best fit when
- •Surface and shrinkage cracks up to 0.8 mm wide
- •Large areas where injection repair would be slow and costly
- •Occupied or sensitive structures requiring non-invasive repair
- •Decks, balconies, and slabs needing frost / freeze-thaw protection
- •Projects targeting fast turnaround (up to ~500 m²/hour)
Consider another product when
- •Spalled concrete or exposed rebar — use MR3 patch mortar instead
- •Structural cracks wider than 0.8 mm
- •New construction — specify Healing Agent in the mix design
Situation-by-Situation Recommendations
Parking decks & bridge decks
Spray-apply ER7 across full deck surfaces to seal map and shrinkage cracks. Pilot data shows ~93% reduction in water permeability and 15+ years of added design life.
Balconies & cantilever slabs
Ideal for hairline cracks where injection is impractical. Non-invasive application protects rebar from corrosion without taking the structure out of service.
Basement walls & floors
Pour or brush ER7 over leaking shrinkage cracks to deliver a watertight seal — without breaking up the slab or injecting from outside.
Water-retaining structures
Use to seal a high count of fine cracks (e.g. the Buitenveldert tunnel project repaired 1,000 shrinkage cracks with ER7). Bacteria stay dormant and reactivate on future water ingress.
Precast elements
Treat micro-cracks that develop during transport, lifting, and curing — preserving warranty performance without rejecting elements.
Industrial flooring
Quick spray application minimizes downtime in operating facilities; frost protection extends life in cold-storage and exterior industrial slabs.
Proven Performance & Service Life
Real-world pilot data backs the ER7 system's ability to meaningfully extend the life of existing concrete.
In a Basilisk pilot project on a bus lane, the design life was extended by a minimum of 15 years after ER7 application.
Water permeability dropped by 93% on average in the same pilot study, dramatically reducing moisture-related deterioration.
Freeze/thaw resistance increased by 57% on average, supporting the longer service life in cold-climate applications.
Technical Details
How It Works
The liquid solution contains limestone-producing micro-organisms that activate upon contact with water in cracks. They produce limestone (CaCO₃) that fills and seals cracks from within, creating a durable and watertight bond compatible with the existing concrete.
Application Method
Simply spray or pour the ER7 solution onto the cracked concrete surface. The liquid penetrates into the cracks by gravity and capillary action. No special equipment, injection, or structural modification is needed.
Ongoing Protection
The bacteria remain dormant until activated by water ingress. This means the system continues to provide autonomous healing long after the initial application, extending the lifespan of the concrete structure.
Key Specifications
| Type | Bio-based liquid solution |
| Crack Filling Width | Up to 0.8 mm |
| Application | Spray or pour |
| Material | 100% organic / bio-based |
| Frost Protection | Yes |
| Healing Mechanism | Limestone-producing bacteria |
Download Technical Documentation
Access the full product data sheet, brochure, and safety data from Basilisk.
Manufactured by Basilisk Self-Healing Concrete · Distributed by Stonix
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