Technical Guide / Waterproofing

Waterproofing Basements in Malta: Bitumen vs. Crystalline

Malta's limestone bedrock is porous. When the rains hit in winter, hydrostatic pressure builds up against basement walls. Choosing the wrong chemical barrier is the most expensive mistake a developer can make.

1. The Foundation Defense: ZNR Bitumen 2K

For external retaining walls (Positive Side), flexibility is key. As the building settles, rigid waterproofing cracks. ZNR Bitumen 2K Plus is fiber-reinforced and rubberized.

Use Case: External Basement Walls, Retaining Walls.
Why: It bridges cracks up to 2mm. Even if the limestone shifts, the membrane stretches.
View Product Specs >

2. The "Negative Side" Solution: Crystalline

What if the water is already coming in? You can't apply Bitumen on the inside; the water pressure will push it off the wall (delamination).

This is where ZNR Crystalline Waterproofer is essential. It is not a coating; it penetrates the concrete capillaries and grows crystals that block water paths. The wetter the wall gets, the stronger the crystals grow.

Use Case: Leaking Elevator Pits, Internal Basement Repairs.
Why: It withstands high negative hydrostatic pressure.

3. Emergency Stops: Hydraulic Plug

For active leaks (water gushing out), standard mortar washes away. ZNR Water Plug sets in 30 seconds, expanding to seal the hole instantly.

Cartel 72 is the exclusive distributor for ZNR Construction Chemicals in Malta.

Browse the Full Chemical Catalogue >