APP Modified Bitumen Membrane – Plain & Mineral-Slated Finish
APP Modified Bitumen Membrane (Betoflex 4P/5P & 4P-SL/5P-SL) is a range of high-performance torch-applied waterproofing membranes manufactured from distilled bitumen modified with Atactic Polypropylene (APP) polymers and reinforced with non-woven polyester fabric.
Product Overview
This product range offers advanced material performance and long-term durability. Formulated to meet high standards of protection and reliability under various site conditions. APP Modified Bitumen Membrane (Betoflex 4P/5P & 4P-SL/5P-SL) is a range of high-performance torch-applied waterproofing membranes manufactured from distilled bitumen modified with Atactic Polypropylene (APP) polymers and reinforced with non-woven polyester fabric.
Best-fit Applications
- • Torch-applied waterproofing for flat, sloped, and inverted roof assemblies
- • Substructure tanking, basement raft slabs, retaining walls, and underground vaults
- • Multi-story car park decks, bridge decks, podium slabs, and wet rooms
- • Mineral-slated finish membranes for exposed roofing without additional wearing screed
Technical Benefits
- • Superior high-temperature resistance and softening point suited for extreme Middle East climates
- • High tensile strength, elongation, and puncture resistance due to spunbond polyester core
- • Excellent dimensional stability and cold flexibility
- • Seamless torch-welded overlaps form a continuous monolithic waterproof barrier
Technical & Performance Specifications
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
Products
Plain APP Plastomeric Membranes (4mm)
Betoflex 4P
Plain APP Plastomeric Membranes (4mm)Explore individual technical documents, specifications, and compatible systems for this named grade.
Plain APP Plastomeric Membranes (5mm)
Betoflex 5P
Plain APP Plastomeric Membranes (5mm)Explore individual technical documents, specifications, and compatible systems for this named grade.
Mineral-Slated APP Membranes (4mm)
Betoflex 4P-SL
Mineral-Slated APP Membranes (4mm)Explore individual technical documents, specifications, and compatible systems for this named grade.
Mineral-Slated APP Membranes (5mm)
Betoflex 5P-SL
Mineral-Slated APP Membranes (5mm)Explore individual technical documents, specifications, and compatible systems for this named grade.
Technical Submittals & Documents
Current TDS
Version: 2026.1 • Released: Feb 2026SDS
Version: 2026.1 • Released: Feb 2026Technical Validation Required
Coverage rates, curing periods, and chemical resistance parameters must be verified against Geobit's project-specific submittals. Do not rely on third-party marketing claim sheets.
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