Belzona 4351
Static Dissipative Chemical Resistant Coating
A static dissipative barrier coating with outstanding chemical resistance and engineered surface conductivity for ESD-sensitive environments.
A high-performance, solvent-free, static dissipative barrier coating with outstanding chemical resistance and engineered electrical conductivity for ESD-sensitive environments.
- SeriesBelzona 4000 Series
- Documents4
Overview of Belzona 4351
Belzona 4351 is a high-performance, two-component, solvent-free, static dissipative barrier coating with outstanding resistance to a broad range of chemicals. The system combines the chemical-resistance properties of Belzona's CR-series coatings with electrical conductivity engineered to safely dissipate static charge — critical for facilities handling flammable solvents, electronics, or explosive atmospheres.
Surface resistivity values measured per ANSI/ESD S7.1 are typically 10⁶–10⁷ ohm/square on concrete and 10⁵–10⁶ ohm/square on steel. The 6:1 by weight Base-to-Solidifier ratio mixes to a thixotropic black coating with sag resistance greater than 30 mil (750 micron). Force-curing at 180–210°F (80–100°C) ensures maximum 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
5 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
- ESD / static-dissipative flooringStatic-sensitive electronics manufacturing facilitiesLearn more
Technical Data
Composition
- Type
- Two-component, solvent-free, static dissipative barrier coating
- Mixing Ratio by Weight (Base : Solidifier)
- 6 : 1
- Mixing Ratio by Volume (Base : Solidifier)
- 4.3 : 1
Components
- Base
- Thixotropic liquid, black, gel strength 140–210 g/cm (FF paddle), density 1.42–1.46 g/cm³
- Solidifier
- Clear liquid, amber, viscosity 0.4–1 poise at 77°F (25°C), density 1.02–1.04 g/cm³
Mixed Properties
- Density
- 1.35–1.39 g/cm³
- Sag Resistance
- Greater than 30 mil (750 micron)
- Time to Peak Exotherm at 68°F (20°C)
- 30–45 minutes
- Peak Exotherm Temperature
- 320–374°F (160–190°C)
- Useable Life at 68°F (20°C)
- 20–25 minutes
Application & Coverage
- Recommended DFT per Coat
- 10 mils (250 micron)
- Theoretical Coverage
- 31.0 sq.ft. (2.9 m²)/kg at 10 mil DFT
- Volume Capacity
- 44.5 cu.in. (730 cm³) per kg
- Force Cure (optimum)
- 180–210°F (80–100°C) for maximum chemical resistance
- Note
- Application to rough or irregular surfaces may reduce coverage by 20–25%
Surface Resistivity (ANSI/ESD S7.1)
- Concrete
- 10⁶–10⁷ ohm/square
- Concrete with Belzona 4911 conditioner
- 10⁷–10⁸ ohm/square
- Steel
- 10⁵–10⁶ ohm/square
Compressive Properties (ASTM D695)
68°F/20°C cure & test
- Compressive Strength
- 14,788 psi (102.0 MPa)
- Proportional Limit
- 13,124 psi (90.5 MPa)
- Young's Modulus
- 2.16 × 10⁵ psi (1,488.3 MPa)
212°F/100°C post-cure & 68°F/20°C test
- Compressive Strength
- 17,944 psi (123.7 MPa)
- Proportional Limit
- 14,871 psi (102.5 MPa)
- Young's Modulus
- 2.31 × 10⁵ psi (1,590.3 MPa)
Flexural Properties (ASTM D790)
- Flexural Strength (68°F/20°C cure)
- 7,570 psi (52.2 MPa)
- Flexural Strength (212°F/100°C cure)
- 8,340 psi (57.5 MPa)
- Flexural Modulus (68°F/20°C cure)
- 7.94 × 10⁵ psi (5,470 MPa)
- Flexural Modulus (212°F/100°C cure)
- 7.0 × 10⁵ psi (4,830 MPa)
Tensile Properties (ASTM D638)
- Tensile Strength (68°F/20°C)
- 5,168 psi (35.63 MPa)
- Tensile Strength (212°F/100°C)
- 6,463 psi (44.56 MPa)
- Elongation (68°F/20°C)
- 0.58%
- Elongation (212°F/100°C)
- 0.83%
- Young's Modulus (68°F/20°C)
- 1.24 × 10⁶ psi (8,545 MPa)
- Young's Modulus (212°F/100°C)
- 1.08 × 10⁶ psi (7,476 MPa)
Adhesion
- Tensile Shear, grit blasted mild steel (ASTM D1002, 68°F)
- 2,400 psi (16.5 MPa)
- Tensile Shear, grit blasted mild steel (212°F post-cure)
- 2,730 psi (18.8 MPa)
- Pull-off, 10 mm thick grit blasted mild steel (ASTM D4541/ISO 4624, 68°F)
- Greater than 3,070 psi (21.2 MPa)*
- Pull-off, 10 mm thick grit blasted mild steel (212°F post-cure)
- Greater than 4,890 psi (33.7 MPa)*
- * Failure of dolly adhesive (bond strength exceeds dolly capability)
Hardness
- Shore D (ASTM D2240, ambient cure)
- 82
- Shore D (212°F/100°C post-cure)
- 84
- Barcol 935 (ambient cure)
- 78
- Barcol 935 (212°F/100°C post-cure)
- 83
- Koenig (ISO 1522, 68°F)
- 139
- Koenig (212°F)
- 151
Impact Resistance (Izod Pendulum, ASTM D256)
68°F/20°C cure & test
- Reversed Notched
- 3.7 KJ/m² (37.1 J/m)
- Un-Notched
- 5.1 KJ/m² (46.2 J/m)
212°F/100°C post-cure
- Reversed Notched
- 3.4 KJ/m² (42.7 J/m)
- Un-Notched
- 4.6 KJ/m² (63.7 J/m)
Heat Resistance
- HDT (68°F/20°C cure, 264 psi fiber stress)
- 113°F (45°C)
- HDT (212°F/100°C cure)
- 185°F (85°C)
- DSC degradation onset (ISO 11357)
- 392°F (200°C)
- Service
- down to -40°F (-40°C); wet up to 140°F (60°C) per chemical resistance limitations
Chemical Resistance
- Excellent resistance to a broad range of chemicals, particularly acids and alkalis
- Refer to Chemical Resistance chart for detailed compatibility information
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)
- 25 minutes
- 77°F (25°C)
- 20 minutes
- 86°F (30°C)
- 15 minutes
Curing Time
Allow Belzona 4351 to solidify before subjecting it to the conditions indicated:
At 59°F (15°C)
- Light pedestrian traffic
- 16 hours
- Vehicular traffic
- 48 hours
- Full chemical resistance
- 14 days
At 68°F (20°C)
- Light pedestrian traffic
- 12 hours
- Vehicular traffic
- 36 hours
- Full chemical resistance
- 7 days
At 77°F (25°C)
- Light pedestrian traffic
- 8 hours
- Vehicular traffic
- 24 hours
- Full chemical resistance
- 6 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
- 6 hours
- Vehicular traffic
- 20 hours
- Full chemical resistance
- 5 days
Service Temperature Limits
- Wet Heat Resistance
- Up to 140°F (60°C) per chemical resistance limitations
- Dry Heat Resistance
- DSC degradation onset 392°F (200°C)
- Lower Service Temperature
- -40°F (-40°C)
- HDT (68°F/20°C cure)
- 113°F (45°C)
- HDT (212°F/100°C cure)
- 185°F (85°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
Product PDFs
Gallery
Frequently Asked Questions
What is Belzona 4351 (Static Dissipative Chemical Resistant Coating) used for?
Belzona 4351 is a static dissipative chemical-resistant coating designed to provide both chemical protection and controlled electrical conductivity. It is ideal for areas where flammable chemicals, solvents, or fine powders are handled and electrostatic discharge must be controlled, such as fuel storage areas, chemical processing zones, and cleanrooms.
What is the mixing ratio of Belzona 4351 (Static Dissipative Chemical Resistant Coating)?
The mixing ratio of Belzona 4351 (Static Dissipative Chemical Resistant Coating) is 6 : 1 (Base : Solidifier) by weight and 4.3 : 1 (Base : Solidifier) by volume. Please see the Product Specification Sheet (PSS) for more information.
How do you apply Belzona 4351 (Static Dissipative Chemical Resistant Coating)?
To apply Belzona 4351, the surface must be clean, firm, and dry, free of rust, paint, and other surface contaminants, and conditioned with Belzona 4911 (Magma TX Conditioner). The static dissipative grounding system must be installed per the Instructions for Use prior to coating. Add the Solidifier to the Base and mix thoroughly until homogeneous. Apply to the prepared surface using a short-bristled brush or roller, ensuring uniform film thickness for consistent dissipative performance. Please see the Instructions for Use (IFU) for more information.
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