Belzona 4341
Magma CR3
A high-performance barrier coating optimized for hot inorganic acid resistance up to 194°F (90°C).
A high-performance, two-component barrier coating optimized for resistance to hot inorganic acids such as sulfuric and hydrochloric acid up to 194°F (90°C).
- SeriesBelzona 4000 Series
- Approvals1
- Documents4
Overview of Belzona 4341
Belzona 4341 (Magma CR3) is a high-performance, two-component barrier coating optimized for resistance to hot inorganic acids — such as sulfuric and hydrochloric acid — with service temperatures up to 194°F (90°C). The system isolates concrete and metal substrates from deteriorating chemical environments in the most aggressive hot inorganic acid service.
Brush- or spray-applied to acid retaining walls, chemical drains and channels, tanks, walkways with non-slip aggregate, pump bases and casings, and tank pads. The 1.5 kg unit covers 26.7 sq.ft. (2.48 m²) at the recommended 16 mil (400 micron) DFT per coat. Force-cured at 80°C (180°F) for 4 hours for optimum chemical resistance. HDT of 205°F (96°C) at 150°C cure with compressive strength of 22,311 psi (153.8 MPa) post-cure.
Key Benefits
Outstanding resistance to a wide range of chemicals
Outstanding performance under elevated temperature conditions including dry heat and steam exposure
Exceptional compressive strength for load-bearing applications and demanding mechanical environments
No solvents, no shrinkage during cure
100% solids formulation reduces health and safety risks in confined spaces with no shrinkage on cure
Bonds strongly to virtually any rigid surface
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
- Storage/chemical tanksStorage tank failure typically starts at the bottom course where stagnant water settles, at the floor-to-shell weld where stress concentrates, or wherever the existing l…Learn more
- Tanks, bunds, chemical zonesChemical containment areas fail when concrete porosity, joint shrinkage, and existing crack networks let spilled product travel into the substrate and through the bund w…Learn more
Chutes & Hoppers
1 applicationProcess Vessels
1 applicationWater & Wastewater Treatment Plant
1 applicationTechnical Data
Composition
- Type
- Two-component barrier coating optimized for hot inorganic acid resistance
- Mixing Ratio by Weight (Base : Solidifier)
- 8.82 : 1
- Mixing Ratio by Volume (Base : Solidifier)
- 6.26 : 1
Components
- Base
- Thixotropic liquid, red/black, gel strength 70 g/cm³, density 1.58 g/cm³
- Solidifier
- Clear liquid, amber, density 1.12 g/cm³
Mixed Properties
- Density
- 1.52 g/cm³
- Sag Resistance
- Greater than 50 thou
- Time to Peak Exotherm at 68°F (20°C)
- 28 minutes
- Peak Exotherm Temperature
- 266°F (130°C)
- Useable Life at 68°F (20°C)
- 15 minutes
Application & Coverage
- Recommended DFT per Coat
- 16 mils (400 micron)
- Coverage (1.5 kg unit)
- 26.7 sq.ft. (2.48 m²) at 16 mil DFT
- Volume Capacity
- 60.7 cu.in. (994 cm³) per 1.5 kg unit
- Force Cure (optimum)
- 80°C (180°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. Post-curing may be required before exposure to chemicals.
Compressive Properties (ASTM D695)
68°F/20°C cure & test
- Compressive Strength
- 14,401 psi (99.3 MPa)
- Proportional Limit
- 7,788 psi (53.7 MPa)
- Young's Modulus
- 2.09 × 10⁵ psi (1,441.3 MPa)
212°F/100°C post-cure & 68°F/20°C test
- Compressive Strength
- 22,311 psi (153.8 MPa)
- Proportional Limit
- 11,950 psi (82.4 MPa)
- Young's Modulus
- 2.18 × 10⁵ psi (1,499.6 MPa)
Flexural Properties
- Flexural Strength (ASTM D790)
- 5,000 psi (34.5 MPa)
Adhesion
- Tensile Shear, grit blasted mild steel (ASTM D1002, 68°F cure)
- 1,500 psi (10.3 MPa)
- Tensile Shear, grit blasted mild steel (212°F post-cure)
- 1,600 psi (11.0 MPa)
- Tensile Shear, grit blasted aluminum (ASTM D1002, 68°F cure)
- 1,190 psi (8.24 MPa)
- Tensile Shear, grit blasted aluminum (212°F post-cure)
- 1,350 psi (9.29 MPa)
- Pull-off, grit blasted mild steel (ASTM D4541/ISO 4624, 7-day cure at 68°F)
- 3,540 psi (24.4 MPa)
- Pull-off, grit blasted aluminum (7-day cure at 68°F)
- 2,930 psi (20.2 MPa)
Hardness
- Barcol 934-1 (ambient cure 68°F)
- 13
- Barcol 934-1 (60°C/140°F post-cure)
- 19
- Barcol 934-1 (100°C/212°F post-cure)
- 32
- Barcol 935 (ambient cure 68°F)
- 80
- Barcol 935 (60°C/140°F post-cure)
- 85
- Barcol 935 (100°C/212°F post-cure)
- 84
Impact Resistance (Izod Pendulum, ASTM D256)
68°F/20°C cure & test
- Reversed Notched
- 3.9 KJ/m² (40.8 J/m)
- Un-Notched
- 4.4 KJ/m² (46.9 J/m)
212°F/100°C post-cure
- Reversed Notched
- 3.8 KJ/m² (48.4 J/m)
- Un-Notched
- 4.4 KJ/m² (55.3 J/m)
Heat Resistance
- HDT (68°F/20°C cure, 264 psi fiber stress)
- 142°F (61°C)
- HDT (122°F/50°C cure)
- 176°F (80°C)
- HDT (212°F/100°C cure)
- 185°F (85°C)
- HDT (302°F/150°C cure)
- 205°F (96°C)
- DSC degradation onset (ISO 11357)
- 374°F (190°C)
- Service
- down to -40°F (-40°C); wet up to 194°F (90°C) per chemical resistance limitations
Chemical Resistance
- Optimized for hot inorganic acids up to 194°F (90°C), including sulfuric and hydrochloric acid
- Post-curing may be required before exposure to chemicals
- Recommended that all proposed applications are checked with TKL at Harrogate or Miami for suitability before proceeding
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:
- 50°F (10°C)
- 35 minutes
- 68°F (20°C)
- 15 minutes
- 86°F (30°C)
- 10 minutes
Curing Time
Allow Belzona 4341 to solidify before subjecting it to the conditions indicated:
At 59°F (15°C)
- Light pedestrian traffic
- 12 hours
- Full chemical resistance
- 7 days
At 68°F (20°C)
- Light pedestrian traffic
- 8 hours
- Full chemical resistance
- 5 days
At 86°F (30°C)
For optimum chemical resistance: allow to solidify for 12 hours at 68°F (20°C), then force cure at 180°F (80°C) for 4 hours.
- Light pedestrian traffic
- 4 hours
- Full chemical resistance
- 3 days
Service Temperature Limits
- Wet Heat Resistance
- Up to 194°F (90°C) per chemical resistance limitations
- Dry Heat Resistance
- DSC degradation onset 374°F (190°C)
- Lower Service Temperature
- -40°F (-40°C)
- HDT (68°F/20°C cure)
- 142°F (61°C)
- HDT (122°F/50°C cure)
- 176°F (80°C)
- HDT (212°F/100°C cure)
- 185°F (85°C)
- HDT (302°F/150°C cure)
- 205°F (96°C)
- Storage Temperature
- 41°F (5°C) to 86°F (30°C) in unopened containers
- Application
- Below 59°F (15°C) cure times extend significantly and chemical resistance is reduced
Certifications & Approvals
Product PDFs
Gallery
Frequently Asked Questions
What is Belzona 4341 (Magma CR3) used for?
Belzona 4341 (Magma CR3) is a high-performance chemical-resistant epoxy coating engineered for the protection of substrates exposed to severe chemical environments, including concentrated acids and aggressive industrial chemicals. It provides outstanding resistance for tank linings, chemical containment areas, and pump components.
What is the mixing ratio of Belzona 4341 (Magma CR3)?
The mixing ratio of Belzona 4341 (Magma CR3) is 8.82 : 1 (Base : Solidifier) by weight and 6.26 : 1 (Base : Solidifier) by volume. Please see the Product Specification Sheet (PSS) for more information.
How do you apply Belzona 4341 (Magma CR3)?
To apply Belzona 4341 (Magma CR3), the surface must be clean, firm, and dry, free of rust, paint, and other surface contaminants, and conditioned with Belzona 4911 (Magma TX Conditioner). Add the entire Solidifier component to the Base unit and mix thoroughly until completely homogeneous. Apply to the prepared surface using a short-bristled brush, roller, or squeegee in two coats, observing the recommended overcoat window between layers. Please see the Instructions for Use (IFU) for more information.
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