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Foundation Membrane – FPO

Siegelt Foundation Membrane – FPO is a flexible, self-sealing waterproofing system engineered to protect basements, foundations and below-ground concrete structures from groundwater, moisture and long-term deterioration.
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  • Basement waterproofing
  • Building foundations
  • Below-ground concrete walls
  • Raft foundations and base slabs
  • Retaining walls
  • Underground structures
  • Subterranean utility areas
  • Structures exposed to groundwater
  • Residential, commercial and infrastructure projects
  • Self-Sealing Waterproofing: Forms a secure bond with freshly poured concrete, helping prevent water migration beneath the membrane.
  • Reliable Groundwater Protection: Creates a durable barrier against groundwater, soil moisture and damp conditions.
  • High Flexibility: Adapts to substrate profiles, structural details and minor movement without compromising protection.
  • Ageing Resistance: Maintains its elasticity and waterproofing performance throughout long-term service.
  • High Mechanical Strength: Withstands tearing, stretching and construction-site stresses during installation.
  • Quick Installation: Supports a simple and efficient application process, reducing installation time and labour requirements.
  • Reduced Sealant Requirement: Designed for installation without extensive dependence on chemical-based construction sealants.
  • Long-Term Assurance: Supported by a 10-year warranty for dependable waterproofing performance.
  • Membrane Material: Flexible Polyolefin, also known as FPO
  • Backing Layer: Modified polypropylene needle-punched non-woven fleece
  • Available Colours: Grey and black
  • Temperature Resistance: –30°C to +60°C
  • Mechanical Properties: High tensile strength and tear resistance
  • Bonding Performance: Designed to integrate securely with freshly poured concrete
  • Water Tightness: Provides a continuous waterproof barrier against groundwater and moisture ingress
  • Water-Vapour Performance: Engineered to control vapour transmission while maintaining waterproofing integrity
  • Ageing Performance: Highly elastic and resistant to long-term environmental deterioration
  • Warranty: 10 years

Ensure the installation surface is stable, level and free from sharp projections, standing water, debris and loose materials.

During installation:

  • Position the membrane with the designated bonding layer facing the fresh concrete
  • Align and lay each membrane section evenly across the prepared surface
  • Maintain the recommended overlap between adjoining sheets
  • Seal overlaps, joints, terminations and penetrations according to the approved system method
  • Avoid wrinkles, folds, punctures and excessive tension during installation
  • Provide additional detailing around corners, pipe penetrations and structural transitions
  • Protect the installed membrane from damage caused by reinforcement work and site traffic
  • Inspect and repair any damaged areas before concrete placement
  • Pour and compact the concrete carefully to ensure complete contact with the membrane
  • Follow the approved project drawings and waterproofing specifications throughout installation

Always refer to the Siegelt Technical Data Sheet and project-specific installation methodology for optimum waterproofing performance.