Product Overview

Nitofill PU1F is a one-component moisture-reactive polyurethane injection resin from Fosroc for the emergency sealing of active water leaks flowing through cracks, joints, voids, and pores in concrete structures. Unlike two-component epoxy injection resins (such as Nitofill UR63) that require the crack to be dry and stable before injection, Nitofill PU1F is specifically designed for wet and actively flowing water conditions — the water that would prevent epoxy from bonding is actually the trigger for the polyurethane reaction, which causes the resin to expand and foam to form a rigid cellular plug in the crack or void. When Nitofill PU1F is injected under pressure into a water-filled crack or void, it comes into contact with the water and reacts to produce carbon dioxide gas. This gas causes the resin to expand rapidly (typically 10 to 30 times its original volume in water-reactive grades), creating a rigid foam that fills the crack and adjoining voids, conforming to the internal shape of the crack and stopping the water flow. The expansion and hardening process takes place within seconds to minutes, stopping active water flow almost immediately. Nitofill PU1F is used in basement crack sealing, tunnel and underground structure water ingress control, construction joint leak stopping, and any concrete structure where active water is flowing and immediate sealing is required. Space Arc Engineering distributes Nitofill PU1F for basement waterproofing remediation, tunnel maintenance, and infrastructure repair projects across Delhi NCR, Ghaziabad, and Northern India.

Applications

• Active water leak stopping in basement walls and slabs through cracks
• Construction joint water ingress control in water-retaining structures
• Tunnel lining and underground structure active leak sealing
• Emergency sealing of water-active joints in sewage treatment structures
• Void filling around leaking pipes penetrating concrete walls
• Foundation and retaining wall crack waterproofing under active water pressure

Key Advantages

• Reacts with water — works where epoxy injection fails in wet cracks
• Rapid expansion (10 to 30 times volume) fills cracks and surrounding voids
• Stops active water flow within seconds to minutes after injection
• Single-component — easy to use with standard PU injection pump
• Rigid foam provides long-term crack sealing and structural void filling
• Essential emergency repair tool for wet underground and below-grade structures