Belzona 3111
Flexible Membrane
A single-component, liquid-applied roof coating for long-term roof protection and waterproofing.
A water-based, single-component, liquid-applied roof coating providing outstanding waterproofing and weatherproofing protection.
- SeriesBelzona 3000 Series
- Approvals3
- Documents4
Overview of Belzona 3111
A cold-applied liquid coating for long-term roof protection, providing outstanding waterproofing and weatherproofing properties. This single-component, water-based roof coating will bond strongly to all types of roofing materials, following even complex roof contours, and will allow the surface to breathe due to its microporous structure. The applied system incorporates a reinforcement sheet to allow easy control of the coating thickness during application as well as adapting to roof movement due to its outstanding elasticity.
This water-based material can be applied on almost any location including schools, hospitals and public buildings thanks to its low odor. It is certified by Energy Star and ETA-Danmark (European Technical Assessment) and has proven to provide excellent protection of roofs for in excess of 25 years.
Key Benefits
Provides long-term protection and waterproofing of roofs in excess of 25 years
Allows trapped moisture to escape while providing long-term weatherproofing protection
Water-based formulation reduces health and safety risks with low odour
Lightweight material that will not overload existing structures
Bonds strongly to virtually any rigid surface
Adapts to roof movements and building expansion due to outstanding elasticity
No mixing required - applied directly from the container by brush or roller
Cures at room temperature without hot work
Energy Star approved - reflective fillers reduce sunlight absorption and minimize air conditioning costs
Application Areas
What this product handles, grouped by equipment area — each links to the full application.
Roof Problem Areas
5 applications- Roof waterproofing & leak repairRoof repair and weatherproofing applications requiring reliable performance in adverse weatherLearn more
- Flashing & glazing-bar sealingSealing of glazing barsLearn more
- Joint, seam & upstand weatherproofingSealing of joints and seams to provide weatherproofing and waterproofingLearn more
- Roof flashing and roofingGutter linings, parapet copings, and metal flashing details take the worst of any roof's thermal and water load, with movement at every dissimilar-material joint working…Learn more
- Roof membranesBuilt-up roof systems and single-ply membranes lose integrity at penetrations, seams, and parapet flashings where UV cycling and thermal movement work the existing seal…Learn more
Tanks & Chemical Containment Areas
2 applicationsTechnical Data
Coverage & Drying
- First Layer Dry Film Thickness
- 10 mil (250 micron) including reinforcing sheet
- Second Layer Dry Film Thickness
- 6 mil (150 micron)
- Total System DFT
- 16 mil (400 micron)
- Drying Time
- Water resistant within 60 minutes under good drying conditions
- Application Limits
- Do not apply when relative humidity above 90% or surface temperature below 41°F (5°C)
Tensile & Elongation Properties (7-day cure at 73.4°F / 23°C)
- Elongation Unreinforced
- 168%
- Elongation Reinforced Crosswise
- 57%
- Elongation Reinforced Lengthwise
- 40%
- Tensile Strength Unreinforced
- 250 psi (1.7 N/mm²)
- Tensile Strength Reinforced Crosswise
- 582 psi (4.0 N/mm²)
- Tensile Strength Reinforced Lengthwise
- 1,110 psi (7.7 N/mm²)
Tear Strength (7-day cure at 73.4°F / 23°C)
- Unreinforced
- 81 pli (14 N/mm)
- Reinforced Crosswise
- 188 pli (33 N/mm)
- Reinforced Lengthwise
- 213 pli (37 N/mm)
Weathering Resistance
- After 1,000 hours ASTM D4798 accelerated weathering, the unreinforced film typically retains an elongation of 167% and a tensile strength of 285 psi (2.0 N/mm²)
- Low temperature flexibility per ASTM D522 at -26°C
- mandrel bending less than 0.5 in
Water Vapor & Wet Adhesion
- Water Vapor Transmission (ASTM D1653, unreinforced)
- 12.6 Perms after 14 days cure
- Wet Adhesion to Galvanized Steel
- 2.9 pli (0.51 N/mm)
- Wet Adhesion to Concrete
- 3.2 pli (0.56 N/mm)
- Wet Adhesion to APP Smooth
- 3.7 pli (0.65 N/mm)
- Wet Adhesion to SBS Granule
- 2.8 pli (0.49 N/mm)
Service Temperature Limits
- Minimum application temperature
- 41°F (5°C) and rising
- Maximum relative humidity for application
- 90%
- Suitable for long-term outdoor exposure including UV and infrared radiation
Mixing & Application
Certifications & Approvals
Product PDFs
Gallery
Videos
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