Belzona 1212
Surface-Tolerant Epoxy
Surface-tolerant epoxy composite for emergency in-situ metal repair of oil contaminated, wet and underwater substrates.
A 2-part surface-tolerant epoxy composite for in-situ metal repair of oil contaminated, wet and underwater substrates.
- SeriesBelzona 1000 Series
- Documents6
Overview of Belzona 1212
A 2-part surface-tolerant epoxy composite engineered specifically for in-situ application to wet, oil contaminated and underwater surfaces. This multi-purpose 100% solids material exhibits rapid cure and excellent adhesion to manually prepared substrates, where grit blasting cannot be achieved.
Belzona 1212 is easy to mix and apply without the need for specialist tools and is ideal for repair kits and emergency situations, ensuring fast back in service time.
Key Benefits
Bonds tenaciously even when surface preparation is minimal or substrate is contaminated
Easy to mix and apply without specialist tools
Cures rapidly even at low temperatures for fast back in service time
Engineered to withstand demanding mechanical loads
Bonds strongly to virtually any rigid surface
Application Areas
What this product handles, grouped by equipment area — each links to the full application.
Pipelines
3 applications- On-line sealing of live leaksWeeping leaks at flange joints, valve packing, and small pipe defects waste product and corrode adjacent steel long before they justify a unit shutdown for proper repair.Learn more
- Pipe/vessel wraps for leak, corrosion protectionComposite wrap repair only delivers its rated pressure performance when the resin-fiber layup is bonded to a properly prepared substrate and cured under the qualified pr…Learn more
- Pipe/vessel wraps on-lineActive leaks on pressurized vessels, headers, and piping demand a repair approach that contains the existing leak path and restores design pressure without venting the l…Learn more
Ships & Maritime Structures
3 applications- Oil & fluid leak sealingIn-situ sealing of oil and fluid leaks on storage tanks, engines, gearboxes, transformers and sumpsLearn more
- Underwater & splash-zone repairLong-term repair of marine equipment and coastal structures, including ship hulls, rudders, propellers and ballast tanks without taking the ship out of serviceLearn more
- Wet & contaminated pipe repairPlate bonding, corrosion pit filling and localised repair of wet, sweating or oil contaminated pipes where grit blasting cannot be achievedLearn more
Electrical & Power Generation Equipment
2 applications- Transformer sealingTransformer oil leaks at radiator gaskets, weld seams, and bushing bolt circles persist because oil-wet steel rejects ordinary surface preparation and because de-energiz…Learn more
- Transformers, gearboxesOil leaks on transformer tanks, gearbox cases, and hydraulic reservoirs migrate along weld seams and bolted flanges where the oil-side film keeps any conventional adhesi…Learn more
Technical Data
Mechanical Properties
- Compressive Strength (7-day, 68°F cure)
- 10,938 psi (75.4 MPa)
- Compressive Strength (194°F post-cure)
- 12,918 psi (89.1 MPa)
- Compressive Modulus (68°F cure)
- 1.95 × 10⁵ psi (1,345 MPa)
- Tensile Strength (7-day, 68°F cure)
- 5,146 psi (35.48 MPa)
- Tensile Strength (194°F post-cure)
- 5,864 psi (40.43 MPa)
- Young's Modulus (7-day, 68°F cure)
- 1.05 × 10⁶ psi (7,246 MPa)
- Flexural Strength (7-day, 68°F cure)
- 9,790 psi (67.5 MPa)
- Flexural Strength (194°F post-cure)
- 11,215 psi (83.0 MPa)
- Shore D Hardness (7-day, 68°F cure)
- 84
- Barcol Hardness 935 (7-day, 68°F cure)
- 82
- Impact Resistance (Izod, reverse notched, 68°F cure)
- 35.2 J/m
- Impact Resistance (Izod, un-notched, 68°F cure)
- 86.4 J/m
Adhesion
- Tensile Shear, Mild Steel (Grit Blasted, Clean & Dry)
- 2,615 psi (18.0 MPa)
- Tensile Shear, Mild Steel (Transformer Oil)
- 2,920 psi (20.1 MPa)
- Tensile Shear, Mild Steel (Wet)
- 2,170 psi (15.0 MPa)
- Tensile Shear, Mild Steel (Underwater)
- 2,000 psi (13.8 MPa)
- Pull-Off Adhesion, Mild Steel (Grit Blasted, Clean & Dry)
- 4,220 psi (29.1 MPa)
- Pull-Off Adhesion, Mild Steel (Transformer Oil)
- 4,635 psi (32.0 MPa)
- Pull-Off Adhesion, Mild Steel (Wet)
- 4,665 psi (32.2 MPa)
- Pull-Off Adhesion, Mild Steel (Underwater)
- 1,925 psi (13.3 MPa)
- Cleavage Adhesion (Carbon Steel, Grit Blasted)
- 1,680 lbf/in (295 N/mm)
Heat & Environmental Resistance
- Heat Distortion Temperature (24-hour, 68°F cure)
- 111°F (44°C)
- Heat Distortion Temperature (7-day, 68°F cure)
- 120°F (49°C)
- Heat Distortion Temperature (194°F post-cure)
- 153°F (67°C)
- Dry Heat Resistance
- 392°F (200°C)
- Salt Spray Resistance
- 12 months, no visible corrosion
Abrasion Resistance
- CS17 Wheels (Dry)
- 54 mm³ loss per 1,000 cycles
- H10 Wheels (Wet)
- 1,061 mm³ loss per 1,000 cycles
Chemical Analysis
- Fluoride
- 110 ppm
- Chloride
- 552 ppm
- Sulfur
- 157 ppm
- Lead, Mercury, Cadmium
- Not Detected
Working Life
- 68°F (20°C)
- 9 minutes
Curing Time
Cure times will vary depending on the ambient conditions.
At 50°F (10°C)
- Machinable
- 2 hours
- Light loading
- 4 hours
- Full loading
- 12 hours
At 68°F (20°C)
- Machinable
- 40 minutes
- Light loading
- 90 minutes
- Full loading
- 8 hours
At 86°F (30°C)
- Machinable
- 30 minutes
- Light loading
- 60 minutes
- Full loading
- 5 hours
At 104°F (40°C)
- Machinable
- 20 minutes
- Light loading
- 30 minutes
- Full loading
- 2½ hours
Service Temperature Limits
- Lower temperature limit
- -40°C (-40°F)
- Upper temperature limit (dry)
- 55°C (131°F)
- Upper temperature limit (wet)
- 50°C (122°F)
Mixing & Application
Product PDFs
Gallery
Videos
Frequently Asked Questions
What is Belzona 1212 used for?
Belzona 1212 is a 2-part epoxy paste designed for repair and rebuilding of damp, wet, oil-contaminated, and underwater surfaces. It is commonly used on pipework, tank walls, ship hulls, splash zones, and other surfaces where surface preparation and complete drying are not feasible.
Can Belzona 1212 be applied underwater?
Yes. Belzona 1212 is specifically formulated to displace water and bond to wet, oily, and submerged surfaces. It cures in immersion conditions, making it ideal for emergency repairs on offshore, marine, and water-handling equipment without dewatering.
What surface preparation is needed for Belzona 1212?
Belzona 1212 is surface tolerant and accepts minimal preparation compared to conventional epoxies. Mechanical roughening, grit blasting, or thorough wire brushing of the substrate is recommended where possible. Loose corrosion, scale, and heavy grease should be removed prior to application.
Related Products
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