Sika Igolflex R| Flexible rubber / bitumen emulsion coating 
Product Category: Bituminous Waterproofing Coating
Brand: Sika
Model Code: Sika® Igolflex® R
Description
Sika® Igolflex® R is a solvent-free rubber bitumen waterproofing coating, designed to form a flexible, thick protective membrane for concrete structures. It provides protection against water penetration, salts, and mild soil acids, making it ideal for underground and foundation waterproofing.
Applications
Used as protective waterproof coating for:
Retaining walls
Basements
Settlement tanks
Underground concrete structures
Function
External waterproofing
Vapour barrier system
Key Features
Flexible and crack-bridging
Suitable for dry and damp substrates
Easy application (no mixing required)
Non-sag on vertical surfaces
Good resistance to soil chemicals (salts & mild acids)
Weather and ageing resistant
Odourless and fungus resistant
Product Information
Type: Rubber-bitumen emulsion coating
Composition: Bitumen
Packaging
20 kg pail
Appearance
Pasty consistency (thick coating)
Shelf Life
9 months
Storage
+5°C to +30°C
Protect from sunlight and frost
Dry, sealed packaging
Technical Properties
Density: 0.96 – 1.20 kg/L
Solid Content: ≥55%
System Structure & Consumption
Standard Waterproof System
Layer
Application
Consumption
Primer
Diluted 1:1 with water
~0.35 kg/m²
1st Coat
Undiluted
~0.70 kg/m²
Reinforcement (optional)
Fiberglass mat (75 g/m²)
—
2nd Coat
Undiluted
~0.70 kg/m²
3rd Coat
Undiluted
~0.70 kg/m²
Application Conditions
Temperature: +8°C to +35°C
Substrate must be damp but without standing water
Drying & Curing
Tack free: 30–60 minutes
Between coats: 6–12 hours
Full cure: 2–4 days
Before screed: ≥72 hours
Substrate Preparation
Surface must be:
Clean
Sound
Free from contaminants
New concrete:
Properly cured
Smooth or wood-float finish
Existing surface:
Remove defects and weak areas
Important Preparation
Fill cracks and voids
Remove protrusions (>3 mm)
Provide fillet (25×25 mm) at corners
Masonry must be flush pointed
Application Method
Stir product manually (no mechanical mixing required)
Apply primer coat (diluted)
Apply 2–3 coats (0.6–0.8 kg/m² each)
Apply each coat after full drying
Apply layers in cross direction
Tools
Brush
Roller
Spray (industrial application)
Important Notes
Do NOT apply in wet or rainy conditions
Do NOT expose to water before curing
Overlap joints ≥100 mm
Protect membrane before screed application
Performance Advantages
Strong underground waterproofing solution
Flexible and durable membrane
Resistant to soil chemicals
Easy application for site work
Cost-effective system
Limitations
Not for UV-exposed surfaces (must be covered)
Not for exposed roof waterproofing
Requires protection layer (screed / backfill)
Cleaning
Clean tools with water immediately
Hardened material → mechanical removal
Safety & Handling
Follow SDS guidelines
Store properly in sealed packaging
Additional Notes
Lab-tested values
Site conditions may affect results
Local regulations may vary
Summary
Sika® Igolflex® R is a reliable bituminous waterproofing solution for below-ground structures, providing flexibility, chemical resistance, and durable protection, making it ideal for basements, retaining walls, and foundation waterproofing systems.