Sikadur Combiflex SG — Flexible Epoxy-Bonded Joint Sealing Waterproofing System | Sika

Expansion joints and movement joints in concrete structures are permanent vulnerabilities. Every building has them, every structure needs them — and every one of them is a potential entry point for water if they aren't sealed with something that genuinely moves with the structure over time. Sikadur Combiflex SG from Sika India is the joint waterproofing system that structural engineers and waterproofing contractors specify on demanding projects precisely because it handles that movement without compromise — and the epoxy-bonded system it uses gives it a level of structural permanence that tape-over-primer approaches can't match.

Combiflex SG works as a complete flexible joint sealing system — a highly elastic strip bonded directly to the concrete substrate using Sikadur epoxy adhesive. That epoxy bond is what sets this apart from alternatives. Sikadur is itself one of the most trusted structural adhesives in the construction chemical space, and when it bonds the Combiflex strip to the prepared concrete surface, it creates a connection that resists hydrostatic pressure, chemical attack, and the kind of continuous structural movement that gradually destroys weaker joint treatments. The strip flexes. The bond doesn't.

It's used wherever joint waterproofing needs to last — expansion joints in water-retaining structures, movement joints in tunnels and bridges, construction joints in basement waterproofing walls, and joints in any below-grade structure where long-term watertightness is non-negotiable. The applications are demanding by nature, which is exactly why a system backed by Sika's global engineering standards gets specified there.

As a waterproofing solution for joints and cracks that actually move, Sikadur Combiflex SG doesn't just seal the gap — it accommodates it. And in a project environment where joint failure means water in the structure, that distinction is everything.