Sika Injection-201 CE — Hydrophobic PU Injection Grout for Flexible Crack Sealing (16 kg)

Not every crack or joint requiring polyurethane injection is actively leaking. Many waterproofing injection applications involve cracks that are damp, dry, or only intermittently wet — conditions where a hydrophilic system that depends on water to react will not perform consistently. For these situations, the correct injection chemistry is hydrophobic — a polyurethane resin that cures independently of water presence, delivers a reliable flexible seal across variable moisture conditions, and handles the full range of crack and joint geometries encountered in concrete waterproofing work.

Sika Injection-201 CE from Sika India Pvt. Ltd. is a hydrophobic single-component polyurethane injection grout engineered for flexible crack sealing and construction joint waterproofing in concrete structures. Unlike hydrophilic systems that are triggered by water, the 201 CE formulation cures consistently in dry, damp and moist conditions — making it the reliable choice for injection applications where moisture levels vary along the crack length or where the crack is not actively flowing but needs a permanent flexible seal against future water ingress.

The cured polyurethane forms a soft, permanently flexible seal that fills the crack geometry completely and moves with the structure under thermal cycling, minor settlement and load-induced deflection — without cracking, debonding or losing its watertight integrity over time. This flexibility makes it particularly well suited to construction joints, expansion joints and dormant cracks in below-grade structures where long-term movement accommodation is as important as initial watertightness.

For waterproofing injection work in basements, tunnels, underground car parks, water retaining structures and below-grade concrete where crack and joint conditions are variable and the injection seal needs to perform reliably regardless of moisture level — Sika Injection-201 CE delivers the hydrophobic PU injection performance that consistent, durable flexible sealing demands.

A construction chemical injection solution from Sika for flexible crack and joint sealing across variable site conditions — Injection-201 CE is the hydrophobic PU injection grout where moisture-independent curing and permanent flexibility are the specification requirements.