Belzona 4311
Magma CR1
A high-performance barrier coating with outstanding resistance to a broad range of acids and alkalis.
A high-performance, two-component barrier coating with outstanding resistance to acids and alkalis. Isolates concrete and metal substrates from chemical environments.
- SeriesBelzona 4000 Series
- Documents4
Overview of Belzona 4311
Belzona 4311 (Magma CR1) is a high-performance, two-component barrier coating with outstanding resistance to a broad range of chemicals, especially acids and alkalis. The system isolates concrete and metal substrates from deteriorating chemical environments, with weight loss less than 0.2% in 98% sulfuric acid (7 days at 20°C/68°F).
Suitable for use as a brush- or spray-applied barrier coating on acid-retaining walls, chemical drains and channels, tanks, pump bases and casings, walkways (with non-slip aggregate), and tank pads. The 1.5 L unit covers 64.6 sq.ft. (6.0 m²) and the 10 L unit covers 430 sq.ft. (40 m²) at the recommended 10 mil (250 micron) DFT per coat. Force-cured at 80°C (176°F) for 4 hours for optimum chemical resistance.
Key Benefits
Outstanding resistance to a wide range of chemicals
Exceptional compressive strength for load-bearing applications and demanding mechanical environments
100% solids formulation reduces health and safety risks in confined spaces with no shrinkage on cure
No solvents, no shrinkage during cure
Bonds strongly to virtually any rigid surface
Lightweight material that will not overload existing structures
Application Areas
What this product handles, grouped by equipment area — each links to the full application.
Tanks & Chemical Containment Areas
7 applications- Chemical containment liningProtection of tanks and secondary containment areas from chemicals and the effects of corrosionLearn more
- Acid-retaining walls, drains & channelsAcid retaining walls subject to thermal cycling or substrate movementLearn more
- Anti-slip walkways & access surfacesWalkways with non-slip aggregate incorporatedLearn more
- Pump bases & tank padsPump bases, pump casings, and tank padsLearn more
- Bund wall/coating for chemical, acid, alkali containment zonesAcid spills in containment areas demand a lining rated for the specific concentration, temperature, and dwell time of the worst-case release rather than a generic chemic…Learn more
- General metal and concrete protectionPlant equipment seldom faces a single chemical exposure, and the right coating system is chosen by the worst-case combination of acid, alkali, solvent, and temperature r…Learn more
- Rebuilding and sealing bund wallsBund walls degrade from the inside out: spalled concrete face, exposed rebar, and a network of cold-joint cracks that propagate every freeze-thaw cycle until the bund no…Learn more
Buildings & Structural Steel
1 applicationWall Problem Areas
1 applicationTechnical Data
Composition
- Type
- Two-component barrier coating
- Mixing Ratio by Weight (Base : Solidifier)
- 6 : 1
- Mixing Ratio by Volume (Base : Solidifier)
- 3 : 1
Components
- Base
- Thixotropic liquid, red or gray, gel strength 77–83 g/cm³, density 2.14 g/cm³
- Solidifier
- Liquid, black, viscosity 3–4 poise at 77°F (25°C), density 1.07 g/cm³
Mixed Properties
- Density
- 1.87 g/cm³
- Sag Resistance
- Greater than 20 mils (500 microns)
- Viscosity
- 47.5 poise at 77°F (25°C)
- Time to Peak Exotherm at 68°F (20°C)
- 37–52 minutes
- Peak Exotherm Temperature
- 212–266°F (100–130°C)
- Useable Life at 68°F (20°C)
- 20 minutes
- VOC (ASTM D2369 / EPA ref. 24)
- 0.28% (5 g/L)
- Resistance to 98% Sulfuric Acid
- Less than 0.2% weight loss after 7 days at 68°F (20°C)
Application & Coverage
- Recommended DFT per Coat
- 10 mils (250 micron)
- Coverage (1.5 L unit)
- 64.6 sq.ft. (6.0 m²) at 10 mil DFT
- Coverage (10 L unit)
- 430 sq.ft. (40 m²) at 10 mil DFT
- Force Cure (optimum)
- 80°C (176°F) for 4 hours
- Note
- Application to rough or irregular surfaces may reduce coverage by 20–25%. Below 59°F (15°C) cure times extend significantly and chemical resistance is reduced.
Compressive Properties (ASTM D695)
68°F/20°C cure & test
- Compressive Strength
- 21,019 psi (144.9 MPa)
- Proportional Limit
- 8,902 psi (61.4 MPa)
- Young's Modulus
- 2.13 × 10⁵ psi (1,468.3 MPa)
212°F/100°C post-cure & 68°F/20°C test
- Compressive Strength
- 24,666 psi (170.1 MPa)
- Proportional Limit
- 10,963 psi (75.6 MPa)
- Young's Modulus
- 2.98 × 10⁵ psi (2,057.6 MPa)
Flexural Properties (ASTM D790, 68°F/20°C)
- Flexural Strength
- 7,420 psi (51.2 MPa)
- Flexural Modulus
- 7.02 × 10⁵ psi (4,840 MPa)
Tensile Properties (ASTM D638)
- Tensile Strength (68°F/20°C)
- 6,717 psi (46.31 MPa)
- Tensile Strength (212°F/100°C post-cure)
- 6,730 psi (46.40 MPa)
- Elongation (68°F/20°C)
- 0.76%
- Elongation (212°F/100°C post-cure)
- 0.91%
- Young's Modulus (68°F/20°C)
- 1.29 × 10⁶ psi (8,920 MPa)
- Young's Modulus (212°F/100°C post-cure)
- 9.88 × 10⁵ psi (6,811 MPa)
Adhesion
- Tensile Shear, grit blasted steel (ASTM D1002)
- 2,990 psi (20.6 MPa)
- Pull-off, steel (ASTM D4541/ISO 4624, 68°F)
- 4,710 psi (32.5 MPa)
- Pull-off, steel (ASTM D4541/ISO 4624, 212°F post-cure)
- 5,460 psi (37.7 MPa)
- Pull-off, concrete with Belzona 4911 conditioner (68°F)
- 770 psi (5.3 MPa)*
- Pull-off, concrete with Belzona 4911 conditioner (212°F)
- 815 psi (5.6 MPa)*
- * Cohesive failure in concrete
Hardness
- Shore D (ASTM D2240, 68°F)
- 83
- Barcol 934-1 (ambient cure)
- 22
- Barcol 934-1 (100°C post-cure)
- 33
- Barcol 935 (ambient cure)
- 77
- Barcol 935 (100°C post-cure)
- 81
Abrasion (Taber, ASTM D4060, 1 kg load, per 1,000 cycles)
- Dry (CS17 wheels)
- 75 mm³
Impact Resistance (Izod Pendulum, ASTM D256)
68°F/20°C cure & test
- Reversed Notched
- 4.6 KJ/m² (48.6 J/m)
- Un-Notched
- 5.1 KJ/m² (51.8 J/m)
212°F/100°C post-cure
- Reversed Notched
- 4.2 KJ/m² (51.9 J/m)
- Un-Notched
- 4.9 KJ/m² (62.8 J/m)
Heat Resistance
- HDT (ambient cure, 264 psi fiber stress)
- 118°F (48°C)
- HDT (100°C post-cure)
- 172°F (78°C)
- Tg (ambient cure)
- 131°F (55°C)
- Tg (100°C post-cure)
- 203°F (95°C)
- DSC degradation onset (ISO 11357)
- 423°F (217°C)
- Service
- down to -40°F (-40°C); wet up to 140°F (60°C)
Atlas Cell Immersion Test
- No blistering (ASTM D714 rating 10) or rusting (ASTM D610 rating 10) after 6 months immersion in deionized water at 140°F (60°C) per NACE TM 0174 procedure A
Electrical Properties
- Dielectric Strength (ASTM D149 Method A)
- 6.7 kV/mm at 250 V/s
Weathering Resistance
- Barrier properties retained following 10,000 hours accelerated weathering exposure (ISO 11341). Note
- a loss of gloss and change in appearance will be observed.
Shelf Life
- Separate Base and Solidifier components have a 5-year shelf life from date of manufacture in original unopened containers stored between 41°F (5°C) and 86°F (30°C)
Working Life
From commencement of mixing, use within:
- 59°F (15°C)
- 35 minutes
- 68°F (20°C)
- 20 minutes
- 86°F (30°C)
- 15 minutes
- 104°F (40°C)
- 10 minutes
Curing Time
Allow Belzona 4311 to solidify before subjecting it to the conditions indicated:
At 59°F (15°C)
- Light pedestrian traffic
- 8 hours
- Vehicular traffic
- 24 hours
- Full chemical resistance
- 14 days
At 68°F (20°C)
- Light pedestrian traffic
- 6 hours
- Vehicular traffic
- 18 hours
- Full chemical resistance
- 7 days
At 86°F (30°C)
- Light pedestrian traffic
- 4 hours
- Vehicular traffic
- 12 hours
- Full chemical resistance
- 3 days
At 104°F (40°C)
For optimum chemical resistance: allow to reach light pedestrian traffic, then force cure at 180°F (80°C) for 4 hours.
- Light pedestrian traffic
- 3 hours
- Vehicular traffic
- 10 hours
- Full chemical resistance
- 2 days
Service Temperature Limits
- Wet Heat Resistance
- Up to 140°F (60°C) for typical applications, refer to chemical resistance data for chemical contact limitations
- Dry Heat Resistance
- DSC degradation onset 423°F (217°C)
- Lower Service Temperature
- -40°F (-40°C)
- Heat Distortion Temperature (ambient cure)
- 118°F (48°C)
- Heat Distortion Temperature (100°C post-cure)
- 172°F (78°C)
- Storage Temperature
- 41°F (5°C) to 86°F (30°C) in unopened containers
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Frequently Asked Questions
What is a chemical-resistant coating?
Belzona engineers chemical-resistant coatings, which are epoxy-based liquid or paste-grade coatings that provide a barrier between harsh acids and alkalis and the substrate. The coating protects the substrate from chemical attack and endures the chemical attack instead. Belzona 4311 (Magma CR1) is a high-performance brushable coating that delivers excellent resistance against a broad range of chemicals.
What is the mixing ratio of Belzona 4311 (Magma CR1)?
The mixing ratio of the high-performance coating, Belzona 4311 (Magma CR1), is 6 : 1 (Base : Solidifier) by weight and 3 : 1 (Base : Solidifier) by volume. Please see the Product Specification Sheet (PSS) for more information.
How do you apply Belzona 4311 (Magma CR1)?
To apply the anti-corrosion coating, Belzona 4311 (Magma CR1), the surface must be clean, firm, and dry, free of rust, paint, and other surface coatings and contaminants. Condition the area using Belzona 4911 (Magma TX Conditioner). To mix the material, add the entire contents of the Belzona 4311 Solidifier component to the Base unit and mix thoroughly until a completely homogeneous liquid is achieved. Apply using a short-bristled brush or squeegee to the prepared surface. A second coat can be applied as soon as possible without disturbing the first coat. Please see the Instructions for Use (IFU) for more information.
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