Product Overview

AquaForte Impermax is a professional‑grade liquid rubber waterproofing membrane designed for ponds, koi systems, lakes, water features, and any structure requiring a durable, flexible, fully bonded liner. Once cured, Impermax forms a seamless, elastic, UV‑resistant membrane that adheres to concrete, stone, metal, wood, polyester, and most existing liners.

Available in Black and Grey, and in 10kg and 2.5kg tins, Impermax is ideal for both full pond builds and repairs or patching.

Key Features

• Seamless waterproof membrane — no folds, joins, or weak points
• Highly elastic coating — up to 400% flexibility to resist cracking
• UV‑resistant finish — long‑term stability in outdoor environments
• Strong adhesion — bonds to concrete, metal, wood, polyester, tiles, and more
• Safe for fish and plants once fully cured
• Easy application — brush, roller, or airless sprayer
• Ideal for new builds or refurbishments
• Available in two colours — Black for depth, Grey for visibility during maintenance

Technical Data

• Colours: Black / Grey
• Sizes: 10kg & 2.5kg
• Coverage:
  • Approx. 1.5–2kg per m² per coat (depending on substrate)
  • Typically 2–3 coats required
• Curing Time:
  • Touch dry: 2–4 hours
  • Full cure: 24–48 hours (temperature dependent)
• Elasticity: Up to 400%
• Application Temperature: +5°C to +35°C
• Finish: Smooth, flexible, fully bonded membrane
• Compatibility: Concrete, render, metal, wood, polyester, tiles, EPDM (with primer), PVC (with primer)

Performance Comparison

Why Choose AquaForte Impermax

• Creates a professional waterproof barrier without specialist equipment
• Perfect for koi ponds, ornamental ponds, waterfalls, lakes, and reservoirs
• Ideal for repairing leaks or refurbishing old concrete ponds
• Long‑lasting, UV‑stable, and resistant to movement and micro‑cracks
• Trusted by installers, landscapers, and koi professionals across Europe

How to Use

1. Prepare the surface — clean, dry, dust‑free, and structurally sound
2. Prime if required — especially on EPDM, PVC, or very porous concrete
3. Apply first coat using brush, roller, or sprayer
4. Allow to dry (2–4 hours)
5. Apply second coat for full waterproofing
6. Optional third coat for high‑pressure or koi systems
7. Allow full cure (24–48 hours) before filling with water

FAQ

Is Impermax safe for koi?
Yes — once fully cured, Impermax is 100% fish‑safe.

Can it be used over old paint or coatings?
Yes, provided the surface is stable, clean, and well‑bonded.

How long does Impermax last?
Typically 20+ years with correct preparation and application.

Can I use it on flexible liners?
Yes — but primer is required for EPDM or PVC.

Which colour should I choose?

• Black: deeper aesthetic, hides algae
• Grey: easier to see fish, debris, and maintenance issues