Katerina Swanson
Loctite threadlocker is a product designed to seal threaded fasteners, preventing them from loosening and protecting them from rust and corrosion. It is available in various strengths and colours, each with different properties and applications. For example, the blue Loctite 242 is a medium-strength thread locker suitable for use on metal parts in oil and
| Characteristics | Values |
|---|---|
| Oil tolerance | Yes |
| Diesel fuel resistance | Yes |
| Unleaded fuel resistance | Yes (once cured) |
| Gasoline resistance | Yes |
| Surface-insensitive properties | Yes |
| Improved high-temperature performance | Yes |
| Chemical resistance | Yes |
| Suitable for use in extreme environmental/chemical conditions | Yes |
| Suitable for fasteners less than 6mm | Yes (Loctite Purple) |
| Suitable for fasteners up to 3/4" | Yes (Loctite Red) |
| Suitable for metal parts | Yes (not plastic) |
| Suitable for inactive metals | Yes (Loctite 243) |
| Suitable for oil pan bolts | Yes |
| Suitable for valve covers | Yes |
| Suitable for stainless steel | Yes (Loctite 243) |
| Suitable for aluminum | Yes (Loctite 242) |
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What You'll Learn
- Loctite 243 is unleaded resistant and can be used on oil-impregnated parts
- Loctite 242 is oil-tolerant and suitable for metal parts
- Loctite 263 is a high-strength thread locker with increased oil tolerance
- Loctite Red Threadlocker is designed for extreme environmental/chemical conditions
- Loctite Epoxy Weld is resistant to diesel fuel and other shop fluids
Loctite 243 is unleaded resistant and can be used on oil-impregnated parts
LOCTITE® 243 is a general-purpose threadlocker that provides a medium-strength bond. It is suitable for use on oil-impregnated parts as it can cut through oil effectively and lock properly. It is also suitable for use on most "as-received" fasteners with light coatings of corrosion prevention oils without cleaning. However, for heavily oiled or contaminated fasteners, it is recommended to use a degreaser such as LOCTITE® SF 7070 to clean the surfaces before applying LOCTITE 243.
LOCTITE 243 is an upgraded version of LOCTITE 242 and is designed to have improved oil tolerance and surface-insensitive properties. It works on all metals, including passive substrates such as stainless steel, aluminium, and plated surfaces, without the need for a primer. It prevents fastener loosening on vibrating assemblies, such as pumps, gearboxes, or presses, and seals against fluids, contaminants, and corrosion to improve lifespan.
LOCTITE 243 is also known for its ease of application, with a nozzle that prevents spillage. It is suitable for medium-strength thread locking needs across metal threads. The standard continuous operating temperature range for LOCTITE 243 is -55˚C to +150˚C. Once cured, LOCTITE 243 is unleaded resistant.
In summary, LOCTITE 243 is a versatile and effective threadlocker that can be used on oil-impregnated parts and provides a medium-strength bond on all metals. It offers improved oil tolerance, prevents fastener loosening, and is unleaded resistant once cured.
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Loctite 242 is oil-tolerant and suitable for metal parts
LOCTITE® 242 is a medium-strength, medium-viscosity, thixotropic threadlocking adhesive designed for metal thread sizes up to M36. It is suitable for general-purpose applications and can be used for applications up to 150°C. It is designed for metal parts, including oil pan bolts and valve covers, and can be used in an oil environment.
LOCTITE® 242 is part of the LOCTITE® threadlocker family, which includes LOCTITE® 243, a higher-viscosity product with improved performance characteristics. LOCTITE® 243 is often preferred for critical applications, such as in the oil and gas industry, heavy machinery, and high-temperature environments. It offers improved shear strength and resistance to temperature fluctuations.
While LOCTITE® 242 is suitable for use in an oil environment, it is important to note that it is not specifically designed to be diesel fuel-resistant. LOCTITE® 243, on the other hand, is known to be unleaded resistant once cured. Additionally, LOCTITE® Epoxy Weld is resistant to diesel fuel and other shop fluids, making it suitable for use in fuelling environments.
When deciding between LOCTITE® 242 and other products, it is essential to consider the specific requirements of the application, such as temperature range, gap size, and the level of security needed. LOCTITE® 242 is a versatile and reliable option for general-purpose applications involving metal parts and can withstand moderate temperatures and provide adequate strength and impact resistance.
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Loctite 263 is a high-strength thread locker with increased oil tolerance
LOCTITE® 263 is a high-strength thread locker with increased oil tolerance. It is a red, dual cure, acrylic dimethacrylate ester fluorescent thread locker that is designed for the permanent locking and sealing of threaded fasteners. It works on active metals such as brass and copper, as well as passive substrates like stainless steel and plated surfaces. LOCTITE 263 is suitable for use on most "as-received" fasteners with light coatings of corrosion prevention oils without cleaning. However, for heavily oiled or contaminated fasteners, it is recommended to use LOCTITE® SF 7070 to degrease and clean surfaces prior to application.
LOCTITE 263 is a high-strength product, ideal for heavy-duty applications such as studs into motor housings. It prevents fastener loosening and leakage from shock and vibration, making it suitable for use in extreme environmental and chemical conditions. The product cures fully in 24 hours and is available in both liquid and semisolid anaerobic forms. It is important to note that the red products are so strong that they require heat to be disassembled.
LOCTITE 263 is a reliable and trusted product, used in the assembly and maintenance of nearly every professional race car engine. It is also suitable for use in a range of other applications, such as repairing electric trolling motors for fishing. The product's high strength, oil tolerance, and resistance to high temperatures make it a versatile and effective solution for various industrial applications.
LOCTITE 263 is part of a range of LOCTITE thread locker products, each designed for specific applications. For example, LOCTITE 242 and 243 are suitable for use in oil and gasoline environments, while LOCTITE Red 271 is designed for the permanent locking and sealing of threaded fasteners. The specific characteristics of LOCTITE 263, including its high strength and oil tolerance, make it a unique and valuable addition to the LOCTITE thread locker range.
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Loctite Red Threadlocker is designed for extreme environmental/chemical conditions
Loctite Red Threadlocker is designed for extreme environmental and chemical conditions. It is the highest-strength product in the Loctite range, curing fully in 24 hours and available in both liquid and semisolid forms. It is designed for permanent locking and sealing of threaded fasteners, protecting threads from rust and corrosion and preventing loosening from shock and vibration.
Loctite Red Threadlocker is suitable for fasteners up to 3/4". Its powerful bonding is such that it requires heat to be disassembled. A primerless grade is also available.
Loctite's range of threadlockers includes products that are resistant to diesel fuel and unleaded gasoline. For example, Loctite 243 is recommended for use on stainless steel and includes a primer that helps it to bond to the surface by cleaning off any oils. Loctite 242, a general-purpose threadlocker, is designed for use on metal parts in an oil environment and can also be used in a gasoline environment.
Loctite Epoxy Weld is resistant to diesel fuel, gasoline, and most shop fluids, making it suitable for use in fuelling environments. Loctite 263 is a high-strength threadlocker with increased oil tolerance and improved high-temperature performance.
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Loctite Epoxy Weld is resistant to diesel fuel and other shop fluids
Loctite is a well-known brand of adhesives and sealants that offers a wide range of products for various applications. One of their popular products is the Loctite Epoxy Weld, a high-strength bonding compound that provides a quick and convenient alternative to welding.
Loctite Epoxy Weld is specifically designed to be resistant to diesel fuel and other shop fluids, making it ideal for use in fuelling environments and with machinery, appliances, tools, and automotive components. It can effectively resist fluids such as diesel fuel, gasoline, antifreeze, hydraulic fluid, motor oil, transmission fluids, and water. This makes it a versatile option for applications where exposure to these fluids is common.
The product is a two-part adhesive system, consisting of an epoxy resin and a hardener. When mixed in equal volumes, they react quickly to form a tough, rigid, and high-strength bond. The cured epoxy can be easily sanded, drilled, machined, or painted, making it suitable for a wide range of repair and rebuilding projects.
Additionally, Loctite Epoxy Weld offers high-temperature performance and can withstand temperatures up to 350°F (177°C) intermittently. This heat resistance, combined with its fluid resistance, makes it a durable and reliable solution for many applications.
Loctite also offers a range of threadlocker products that are designed to be tolerant of oil and other contaminants. For example, the LOCTITE® 243™ threadlocker is an upgraded version that offers improved oil tolerance and surface-insensitive properties. It can be used on oil-impregnated parts and provides sealing against fluids, contaminants, and corrosion.
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Frequently asked questions
Yes, Loctite Threadlocker is impervious to oil and diesel fuel. It is designed to seal against fluids, contaminants, and corrosion to improve lifespan.
LOCTITE® 243™ threadlocker is an upgraded version of LOCTITE 242 ®, and is more of a general-purpose adhesive. It is designed to have improved oil tolerance and can be used on oil-impregnated parts.
Benefits of using LOCTITE® threadlockers include sealing against fluids, contaminants, and corrosion to improve lifespan, providing lubricity to achieve controlled friction during assembly, and preventing galling and seizing for reliable disassembly.
Yes, Loctite 263 is a high-strength threadlocker that is formulated to deliver the best performance on active and passive metals. It has increased oil tolerance and improved high-temperature performance.
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