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Underwater Application + Cures Underwater + Eco-friendly and Non-toxic to Fish | Suitable for Cold Northern Climates, Humid Southern Regions and Marine Environments
This product is a high-performance underwater adhesive sealant, suitable for aquariums, seafood tanks, marine parks, crystal brick walls, swimming pools, boat hulls, water tanks, drainage pipes and similar applications.
It supports direct application in damp environments and underwater, allowing leaks to be repaired without draining the water.
It remains flexible across a wide temperature range from -40°C to +90°C, is resistant to shrinkage, water and oil, and withstands marine climates, truly achieving underwater bonding and long-lasting leak prevention.
Key Selling Points
✅ Underwater Application: Work whilst the water is present; no need to empty fish tanks or pools
✅ Strong Bond: Bonds underwater within 24 hours; can easily support the weight of two buckets of water
✅ High and Low Temperature Resistance: Does not crack or soften between -40°C and +90°C
✅ Shrinkage Resistance: Dimensionally stable after curing; no delamination
✅ Formaldehyde-free · Low VOC: Harmless to fish and humans
✅ Water and oil resistant: Does not dissolve or degrade during prolonged immersion
Applications
Fish tanks, glass brick walls, seafood display tanks
Marine parks, aquariums, swimming pools
Ships, navigation buoys, underwater equipment
Washbasins, buckets, drainpipes, sewage pipes
Leak-proofing and repair of metal/glass containers
Test Results
Glass fish tank waterproofing ✅ No further leaks after application
Metal container waterproofing ✅ No further leaks after application
Underwater bonding strength ✅ Supported two buckets of water after 24-hour curing
Fish safety ✅ Formaldehyde-free; fish remain healthy and alive
Instructions for Use
Clean the substrate
Remove dust, grease, rust and silt to ensure the surface is clean.
Bevel the nozzle at a 45° angle
Extrude the adhesive at a 45° angle to the substrate, ensuring sufficient adhesive to fill the gap completely.
Allow to cure
Wait for at least 24 hours; do not use until fully cured.
Specifications and Coverage
Specifications: Reference bonding length Suitable applications
60ml per tube: Approx. 1.5–2 metres Small aquariums, water pipes, washbasins
2-tube pack: Approx. 3–4 metres Medium-sized aquariums, seafood tanks
3-pack: approx. 4.5–6 metres Aquariums, pool repairs
5-pack: approx. 7.5–10 metres Large-scale projects or spares
Free application tools: Finger cots + Nozzle
Frequently Asked Questions (FAQ)
Can it be applied directly underwater?
Yes. This product is specifically designed for bonding in damp environments and underwater, with no need to drain the water.
Is it toxic to fish?
No. It is formaldehyde-free, low in VOCs and does not pollute the water; it has passed fish survival tests.
Can it be used outdoors in northern regions during winter?
Yes. It withstands temperatures as low as -40°C and resists shrinkage, making it suitable for use in both the severe cold of the north and the damp conditions of the south.
How long does it take to dry?
Surface tack is achieved in approximately 1–2 hours; full cure is recommended after 24 hours or more.
Can it bond metal, glass and plastic?
Yes. It offers good adhesion to most substrates, including glass, metal, ceramics and hard plastics.
