Belzona 1121
Super XL-Metal
An epoxy-based repair composite with extended working life for metal repair.
A 2-part epoxy-based repair composite with extended working life, designed for metal repair and protection.
- SeriesBelzona 1000 Series
- Approvals1
- Documents6
Overview of Belzona 1121
A 2-part repair composite for metal repair and resurfacing based on 100% solids epoxy resin reinforced with silicon steel alloy. This repair material has been developed to offer an extended working life, ideal for large applications where greater volumes of material are required or to provide adequate working time at higher temperatures.
Belzona 1121 (Super XL-Metal) will not corrode and resists a wide range of chemicals. It is easy to mix and apply without the need of specialist tools and can be machined using conventional tools.
Key Benefits
Versatile solution for multiple application types
Engineered for demanding performance requirements
Easy to mix and apply without specialist tools
No solvents, no shrinkage during cure
Application Areas
What this product handles, grouped by equipment area — each links to the full application.
Valves, Pipes & Fittings
6 applications- Flange sealing & repairSealing of joints and flangesLearn more
- Pipework, valves & fittingsPiping, pipeline, and pipeworkLearn more
- Shimming & equipment reseatingShimming and reseating of irregular equipmentLearn more
- Structural metal bondingHigh strength structural adhesive for metal bondingLearn more
- Shaft & hydraulic ram repairRepair of damaged shafts and hydraulic ramsLearn more
- On-site flange repairFlange faces deform from heat cycling, gasket-witness machining, and dropped-tool damage, and a leaking flange usually has to be re-machined back to spec or the line sta…Learn more
Pumps
2 applicationsMechanical Power Transmission
1 applicationProcess Vessels
1 applicationSeparators
1 applicationTechnical Data
Mechanical Properties
- Compressive Strength
- 9,000 psi (62.0 MPa)
- Compressive Modulus
- 4.6 × 10⁵ psi (3.2 GPa)
- Ultimate Tensile Strength
- 3,185 psi (22.0 MPa)
- Young's Modulus
- 7.9 × 10⁵ psi (5.4 GPa)
- Flexural Strength
- 2,800 psi (19.3 MPa)
- Flexural Strain at Break
- 0.62%
- Shore D Hardness
- 85
- Impact Resistance (Izod, un-notched)
- 1.23 ft-lb/in (65.9 J/m)
Adhesion
- Tensile Shear, Carbon Steel
- 3,500 psi (24.1 MPa)
- Tensile Shear, Aluminum
- 2,500 psi (17.2 MPa)
- Tensile Shear, Copper
- 2,600 psi (17.9 MPa)
- Pull-Off Adhesion (Steel)
- 7,000 psi (48.3 MPa)
- Cleavage Adhesion (Carbon Steel)
- 1,050 lbf/in. (18.8 kgf/mm)
Heat & Environmental Resistance
- Glass Transition Temperature (Tg)
- 130°F (54°C)
- Dry Heat Resistance
- 392°F (200°C)
- Salt Spray Resistance
- 1,000 hours, no visible corrosion
Abrasion Resistance
- CS17 Wheels (Dry)
- 66 mm³ loss per 1,000 cycles
- H10 Wheels (Wet)
- 1,345 mm³ loss per 1,000 cycles
Working Life
From commencement of mixing, use within:
- 41°F (5°C)
- 90 minutes
- 59°F (15°C)
- 45 minutes
- 77°F (25°C)
- 35 minutes
- 86°F (30°C)
- 25 minutes
Curing Time
For ¼ in. (6 mm) thickness — reduced for thicker, extended for thinner sections
At 41°F (5°C)
- Movement / no loading
- 28 hours
- Light loading
- 4 days
- Full mechanical or thermal loading
- 10 days
- Chemical immersion
- 24 days
At 50°F (10°C)
- Movement / no loading
- 15 hours
- Light loading
- 2 days
- Full mechanical or thermal loading
- 5 days
- Chemical immersion
- 12 days
At 59°F (15°C)
- Movement / no loading
- 9 hours
- Light loading
- 27 hours
- Full mechanical or thermal loading
- 3 days
- Chemical immersion
- 7 days
At 68°F (20°C)
- Movement / no loading
- 4¾ hours
- Light loading
- 16 hours
- Full mechanical or thermal loading
- 1½ days
- Chemical immersion
- 4 days
At 77°F (25°C)
- Movement / no loading
- 2½ hours
- Light loading
- 9 hours
- Full mechanical or thermal loading
- 1 day
- Chemical immersion
- 2½ days
At 86°F (30°C)
- Movement / no loading
- 1½ hours
- Light loading
- 5 hours
- Full mechanical or thermal loading
- 16 hours
- Chemical immersion
- 1½ days
Service Temperature Limits
- Lower temperature limit
- -40°C (-40°F)
- Upper temperature limit (dry)
- 60°C (140°F)
- Upper temperature limit (wet)
- 50°C (122°F)
Mixing & Application
Certifications & Approvals
Product PDFs
Gallery
Frequently Asked Questions
How do you use Belzona 1121 to fill holes in metal without welding?
Belzona 1121 is a 2-part epoxy composite for metal repair and resurfacing. The paste is applied directly onto the application site with a plastic applicator or spatula. Press down the product firmly to fill all cracks, remove entrapped air, and ensure maximum contact with the surface. Belzona 1121 can be contoured to the correct profile with a plastic applicator or allowed to cure and then machined down to create a smooth profile. In addition, Belzona 9341 (Reinforcement tape) can be stippled over cracks, gaps, and holes, allowing it to fill holes in metal without welding.
What is the cure time of 2-part epoxy, Belzona 1121?
The cure time for 2-part paste-grade epoxy system, Belzona 1121 varies depending on the ambient conditions and will be reduced for thicker sections and extended for thinner sections. Please see the product's Instructions for Use for more information.
Where can you buy epoxy repair composite, Belzona 1121?
Epoxy repair composite, Belzona 1121, can be bought from a local authorized Belzona distributor.
Related Products
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