Prymax Pond Sealer Black 1kg

A tough, single-pack polyurethane sealer made for protecting concrete-rendered ponds below the waterline. This black version of Prymax Pond Sealer gives a strong, clean finish that’s resistant to water, oil, and everyday chemicals. It forms a hard, non-absorbent surface thats easy to keep clean, helping to reduce maintenance and preserve the look of your pond long-term.

This product should be used specifically below the waterline. For areas above the waterline or any surrounding paving, use Prymax Marine Clear Seal. Beyond pond sealing, its also suitable for damp-proofing internal render, plaster and plasterboard, as well as sealing dusty concrete floors. It can be used on internal wood surfaces and externally on walls, but should be overpainted for UV protection.

Key Features:

• One-pack formulation no mixing needed
• Long-lasting finish with excellent durability
• Water-resistant and chemical-resistant
• Easy to clean and maintain
• Suitable for multiple surfaces indoors and out
• Fast-drying: touch dry in under an hour
• Full chemical resistance after 72 hours
• Can handle light foot traffic after 12 hours

Application requires two coats of clear followed by two coats of black, all within three hours of each other. If that window is missed, allow to cure for 24 hours and lightly sand before recoating.

This black variant gives a professional, dark finish that works well in garden ponds and contemporary landscaping. Its a practical choice for both new builds and refurbishments.