G4 Pond Sealer – 1 kg – Clear or Black
Deep-Bonding Concrete Sealer for Ponds & Water Features
 
Bonda G4 Pond Sealer is a high-performance, deep-bonding plastic coating specifically formulated to seal concrete ponds and water features. It locks in free lime within the concrete, helping to prevent leaching that can raise pH levels and harm aquatic life.
Designed for professional use, G4 can be applied without a primer and performs reliably even at low temperatures, making it ideal for UK conditions.
 
Why G4 Is the Correct Sealer for Concrete Ponds
Seals in lime – protects water quality
Deep-bonding formulation – penetrates concrete for long-term performance
No primer required – faster, simpler application
Low-temperature application – extends working season
A proven solution for new builds and refurbishments.
 
Material & Performance
Forms a durable plastic coating
Strong adhesion to concrete surfaces
Creates a waterproof, long-lasting seal
Suitable for permanent submersion once cured
Commonly used by professional pond builders and landscapers.
 
Typical Applications
Concrete ponds
Rendered ponds and water features
Concrete waterfalls and streams
Refurbishment of existing concrete structures
Ideal where traditional liners are impractical or undesirable.
 
Available Options
Size: 1 kg
Colours:
Clear
Black
Choose clear to retain the natural concrete look, or black for a darker, more natural pond finish.
 
Application Notes
Surface must be clean, dry, and free from dust or contaminants
Apply evenly using brush or roller
Allow adequate curing before filling
Always follow manufacturer guidelines for curing and commissioning.
 
Bottom Line
G4 Pond Sealer is a trusted, professional-grade solution for sealing concrete ponds and water features. Deep bonding, primer-free application, and low-temperature usability make it a reliable choice for long-lasting, watertight results.