SikaSwell S-2 is a one-part polyurethane hydrophilic sealant designed to seal construction joints and penetrations in reinforced concrete structures. The sealant expands when exposed to water, forming a watertight barrier that helps prevent water ingress through concrete joints, service penetrations and structural interfaces.
The product is commonly used in conjunction with SikaSwell hydrophilic waterstop profiles to fix and seal joints prior to concrete placement. Its moisture-curing polyurethane formulation provides strong adhesion to common construction substrates while maintaining the ability to swell repeatedly when exposed to water during wet and dry cycles.
SikaSwell S-2 is widely used in basements, retaining walls, lift pits, tunnels and water retaining structures where reliable joint sealing is required within concrete construction.
β’ One-part polyurethane hydrophilic sealant
β’ Expands in contact with water to seal construction joints
β’ Compatible with SikaSwell A and SikaSwell P profiles
β’ Excellent adhesion to common construction substrates
β’ Suitable for wet and dry exposure cycles
β’ Easy application using standard sausage guns
β’ Fixing SikaSwell hydrophilic waterstop profiles
β’ Sealing concrete construction joints
β’ Pipe penetrations through walls and slabs
β’ Service penetrations and cable ducts
β’ Basement and underground structures
β’ Retaining walls and water retaining structures
β’ Product type: Hydrophilic polyurethane sealant
β’ Composition: 1-part moisture curing polyurethane
β’ Colour: Oxide red
β’ Density: 1.24kg/L
β’ Skinning time: ~60 minutes
β’ Curing rate: ~2mm per 24 hours
β’ Recommended water pressure resistance: up to 2 bar
β’ Packaging stocked: 600ml sausage (unipac)
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