Betoflex 5S

Betoflex 5S is a high-performance elastomeric waterproofing membrane specifically formulated for demanding structural applications. It features excellent resistance to high soil temperatures, hydrostatic pressure, chemical attack from groundwater sulfates, and structural movement, designed to support watertight integrity for roofs, below-grade substructures, and podiums.

Product Overview

Betoflex 5S - Plain belongs to the Waterproofing Primers, Membranes & Protection Boards family. It is intended for protected roofs, basements and foundations, podiums and infrastructure decks. Final product selection must account for substrate condition, exposure, application method and compatibility with adjoining layers. Betoflex 5S is a high-performance elastomeric waterproofing membrane specifically formulated for demanding structural applications. It features excellent resistance to high soil temperatures, hydrostatic pressure, chemical attack from groundwater sulfates, and structural movement, designed to support watertight integrity for roofs, below-grade substructures, and podiums.

Best-fit Applications

• Protected roofs
• Basements and foundations
• Podiums
• Infrastructure decks

Technical Benefits

• Flexible sheet barrier
• Strong detailing continuity
• Works in multilayer protected assemblies

Technical & Performance Specifications

Physical Property	Declared Performance Value	Test Standard
Thickness	4.0 mm nominal	ASTM D5147
Tensile Strength (L/T)	850 / 650 N/5cm	ASTM D5147
Elongation at Break (L/T)	45% / 50%	ASTM D5147
Low Temperature Flexibility	-5°C to -15°C	ASTM D5147
Heat Resistance	No flow at 120°C	ASTM D5147
Water Absorption	< 0.2%	ASTM D5147

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Application Guidelines & Installation Method

Step 1: Prepare a clean, dry and smooth substrate.

Step 2: Apply the specified primer.

Step 3: Align and roll out the membrane, provide required side and end laps, and seal laps as detailed in the approved TDS.

Step 4: Check that joints are watertight.

Step 5: Protect completed waterproofing from subsequent works with protection board or the relevant approved protective material.

Standard Compliance

Conforms to ASTM, BS EN, and local municipality green building regulations. Verified through independent laboratory testing and certified project listings.