Fish Safe Marine Sealant

£17.99

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Heavy-duty underwater sealant for instant, safe repairs – even while submerged.

✅ Bonds instantly underwater without removing fish
✅ Solvent-free and isocyanate-free – safe for ponds and aquariums
✅ Adheres to a wide range of materials including rubber, vinyl, wood, and more

More Information

Use this pond calculator to work out the exact litres of paint needed.

Gold Label Underwater Sealant is a professional-grade solution for repairing and sealing in aquatic environments. Perfect for both pond and aquarium use, it works instantly on wet surfaces and can be applied underwater without needing to remove fish. Its non-toxic, solvent-free formulation makes it safe for all aquatic life.

This high-quality, heavy-duty sealant is perfect for sticking together a wide variety of materials including, various forms of rubber, vinyl, plastic, ceramic, concrete, wood and much more.

For detailed instructions and safety information, please refer to the product data sheet.

How to Use

Clean all surfaces to remove grease, algae, or other debris.

Apply the sealant directly to the surface needing repair or bonding.

For areas where movement may occur, leave at least 5mm bead thickness between materials.

Curing Times:

Initial tack: 2–3 hours

Paintable: after 4 hours

Full cure: 24 hours (may continue hardening for up to 7 days)

Temperature: Do not apply below 10°C.

When used with livestock present, ensure the product cannot be ingested during curing.

For detailed instructions and safety information, please refer to the product data sheet.

Technical Information

Available in Black or Clear 290ml tubes

Solvent-free and isocyanate-free – safe for aquatic environments

Compatible with materials such as:

Rubber (including butyl and EPDM liners)

Vinyl

Plastic

Ceramic

Concrete

Wood

For detailed instructions and safety information, please refer to the product data sheet.

Delivery

Speedy delivery is our promise! Expect your order to arrive promptly, typically between 24-48 hours, thanks to our efficient service.

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Transform your pond in days

☑️ Suitable for multiple surfaces
Designed for concrete, masonry, fibreglass, and marine plywood ponds and water features.
☑️ Easy to apply pond paint
The easy-to-use formula applies like regular paint, with a brush or roller, for a professional-looking finish.
☑️ Quick drying waterproof coating
Enjoy minimal downtime - apply the second coat next day and refill your pond in just 7 days.
☑️ Fish safe pond paint
Our non-toxic formula ensures no harmful chemicals leach into the water once cured, keeping your fish happy and thriving.

Where can A1 Pond Paint be used?

Garden Ponds
Water Features
Aquariums
Koi Ponds

Bring your pond vision to life

Before
After

Before
After

See A1 Pond Paint in action

Real ponds, real results...

Read what some of our customers think of our great pond paint after they've used it

★★★★★ Mr Harry W

Excellent product

Excellent product easy to apply very good coverage. Wouldn’t hesitate in recommending this product to anyone considering a pond refurbishment or a new pond.

★★★★★ Mr Pete F

Easy to use

I was so pleased with your product and ease of its application, that I would like to share photos of our finished water feature.
Many thanks for your assistance in choosing the right product. I will recommend you to anyone who I know attempting this type of project.

★★★★★ Mr Sheldon B

Best product

For waterproofing any project that will hold animals or fish the best product I have found is A1 Pond Paint from Antel. It is completely safe once dried and that is what makes it worth the money. It is water based but sets like a resin. It's a two part paint so mix small batches at a time because it actually goes a long way. I have built two large grow beds for a large aquaponic system (Pictured below) and a few other bits and I still have about half a tin left.

★★★★★ Mr Noge M

Stunning

Just wanted to say thanks to Julian for his advice. Never painted a pond and his help was very much appreciated. Must say the difference before and after is stunning!

Featured is My Weekly Gardening

A1 Pond Paint Preserves Water Features in Kensington Palace’s Diana Memorial Garden

A1 Pond Paint Enhances the Refurbishment of the Burj Al Arab Aquarium

FAQs about our Pond Paint

Is Pond Paint safe for fish?

Yes, A1 Pond Paint is completely fish safe once fully cured. After around 7 days, the coating becomes chemically inert, meaning it will not release any harmful substances into the water. This makes it suitable for ponds with fish and other aquatic life.

What surfaces can pond paint be used on?

A1 Pond Paint can be applied to a wide range of surfaces including concrete, masonry, fibreglass, and marine plywood. It is designed to create a strong waterproof coating on rigid pond structures and water features.

Can I use pond paint on a pond liner?

No, pond paint is not suitable for flexible pond liners. It is designed for solid surfaces such as concrete or fibreglass and will not adhere properly to liner materials.

How many coats of pond paint do I need?

Two coats are recommended for best results. This ensures full coverage and creates a durable, waterproof barrier that protects your pond from leaks and damage.

How long does pond paint take to dry?

Pond paint is typically touch dry in around 6 hours and hard dry in approximately 12 hours at 20°C. Drying times may vary depending on temperature and ventilation.

How long should I wait before refilling my pond?

You should wait at least 7 days before refilling your pond. This allows the paint to fully cure and ensures it is completely safe for fish and aquatic life.

How much pond paint do I need?

As a guide, 1 litre of pond paint covers approximately 6–7 square metres on a smooth surface. Coverage will vary depending on surface condition and porosity, so it’s recommended to allow extra for rough or absorbent surfaces.

What is the best pond paint for concrete ponds?

Epoxy-based pond paints, like A1 Pond Paint, are considered one of the best options for concrete ponds. They provide a strong, waterproof seal and long-lasting protection against leaks and surface damage.

Do I need to prime a pond before painting?

In most cases, priming is not required if the surface is clean, dry, and properly prepared. However, very porous surfaces may benefit from a first thin coat to improve adhesion.

How long does pond paint last?

When applied correctly, pond paint can last for many years. Its durability depends on surface preparation, application, and environmental conditions, but epoxy coatings are known for long-term performance.

What’s the difference between pond paint and pond sealant?

Pond paint creates a durable, waterproof coating on the surface, while sealants are typically used for joints, cracks, or smaller repairs. For full pond waterproofing, paint is usually the better option.

Need help choosing your perfect Pond Paint?

Our friendly team is here to assist! Whether you're unsure which colour would best suit your pond or have questions about using A1 Pond Paint, we're happy to help.

Get expert advice now 👉

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Fish Safe Marine Sealant