Overview
Belzona 5821 is a two-component, ceramic-filled, 100% solids epoxy coating applied by brush or spray, developed to protect metallic and non-metallic surfaces operating under continuous immersion and direct contact with aqueous solutions.
Belzona 5821 provides outstanding protection against corrosive effects caused by salts, water, acids, alkalis, alcohols and hydrocarbons. It can be applied to virtually all rigid substrates including cast iron, stainless steel, brass, copper, concrete, wood, fiberglass and aluminum.
Benefits
Effectively protects critical equipment operating under continuous immersion and in direct contact with aqueous solutions.
Its 100% solids, solvent-free formulation provides a safer application with improved health and safety conditions.
Can be easily applied by brush or spray.
Applied and cured at ambient temperature with no hot work required.
Performance across acids, alkalis, and solvents
Helps eliminate the need for equipment replacement and reduces operational downtime.
Provides excellent adhesion to virtually all rigid substrates including cast iron, stainless steel, brass, copper, concrete, wood, glass-reinforced plastic (GRP/FRP) and aluminum.
Applications
Protection of metallic surfaces exposed to the marine environment against corrosion, erosion and environmental damage.
Protective coating for surfaces exposed to salt water, chemicals and corrosion.
Protection against corrosion, wear and flow-induced erosion damage.
Protection against surface damage that causes wear, corrosion and loss of performance.
Protection against cavitation, erosion and seawater damage to help extend equipment service life.
Specs
| TECHNICAL DATA | ||
| Mixing ratio (Base:Solidifier) | 3 : 1 by volume | 5 : 1 by weight |
| Working life | 105 minutes at 20°C (68°F) | |
| Shelf life | 5 years | |
| Service temperature | Down to -40°C (-40°F) | Up to 50°C (122°F) in aqueous solutions |
| Pull-off adhesion | Grit-blasted steel: 36.5 MPa (5,290 psi) | Tensile shear, mild steel: 20.8 MPa (3,020 psi) |
| Additional adhesion | Stainless steel: 20.7 MPa (3,000 psi) | Aluminum: 19.1 MPa (2,770 psi) |
| Compressive yield strength | 39.9 MPa (5,790 psi) | |
| Coverage rate | 2-coat system at 400 µm (16 mil): theoretical coverage 2.5 m²/L (27 ft²/L) Color: Yellow or Slate Gray | |
Curing Times
| CURE TIMES | |||
|---|---|---|---|
| Temperature | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) |
| Light loading | 36 hours | 18 hours | 9 hours |
| Full mechanical/thermal loading or water immersion | 8 days | 5 days | 2 days |
| Chemical contact | 12 days | 7 days | 5 days |
Product PDFs
Gallery
