Loctite is the most popular thread sealant

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A little about Loctite

The sealant went on sale in the middle of the last century and quickly gained the trust of people. Consumers highly appreciated its quality and performance characteristics.

The creator of this product, chemist Vernon Krible from Harford (Connecticut, USA), experimented with ester polymerization inhibitors. He wanted to cure in an airless space, which led to the creation of anaerobic glue.

Further work led to the creation of a material called a “liquid locknut.” It eliminated the problem of unscrewing and provided high-quality and durable fastening. This was an excellent solution for securely securing threaded connections.

This is how Loctite was born. During subsequent experiments, the range of sealants expanded significantly, and additional products with similar or different performance appeared. An example is the world famous superglue. The compositions were created on a diverse basis:

• epoxy;
• acrylic;
• silicone.

The world saw cyanoacrytal and anaerobic agents with a wide spectrum of action. An important achievement was the polymerization of one-component compositions, which expanded the range of applications.

Another development spiral was set in 1997, when the Loctite company was acquired by the world-famous Henkel concern. The corporation retained the original name of the sealant, but made it even more reliable, practical, durable and affordable.

Types of compositions

The variety of the entire line of Loctite sealants is amazing. On the shelves of construction/hardware stores you can find compounds labeled with the following values:

• 518
• 574
• 577
• 5699
• 5900
• 5910
• 5920.

The rich assortment led to the popularization of the product, and now Loctite is actively used to solve a variety of problems. It is suitable for industrial and private needs, and its reasonable price makes it accessible to a wide range of consumers.

Threaded fasteners

These compounds prevent self-unscrewing of hardware. They are used to securely and quickly connect fasteners, providing excellent sealing.

The main advantage of semi-solid and viscous products is that they fill all available space, eliminating the possibility of leakage of liquid and gaseous media.

Polymerization occurs at room temperature. Threadlockers are great for working with metal joints because they are known for their high adhesion. Other advantages of these funds include:

• vibration resistance;
• durability;
• practicality of connection;
• effective elimination of leaks on various threaded connections;
• wide range of operating temperatures.

Among the entire model range, the most popular are those labeled:

• 243;
• 270;
• 2400.

Loctite sealant is known for its economical consumption. Threadlockers are easy to apply and do not require additional tools.

Thread sealants

They deserve the most attention. Having a special composition, these products provide complete sealing of the thread. Liquid and gases do not leak even through small cracks and openings, which makes it possible to do without FUM tape, tow and other devices.

Loctite provides reliable sealing of threaded connections. The liquid, but moderately thick consistency efficiently fills gaps, eliminating leaks.

The advantages of Loctite sealant for threaded connections include:

• preservation of properties at elevated temperatures;
• low pressure after application;
• Excellent load resistance once fully cured.

For ease of use, this composition is also available in the form of a sealing thread. Loctite anaerobic sealant polymerizes even in a vacuum when in contact with metal. Silicone cures at room temperature. This is facilitated by the moisture contained in the air.

Loctite is classified by application:

• anaerobic - for metal pipes;
• silicone - for plastic threads;
• sealing thread - for conical connections made of metal and plastic.

Flange sealants

As the name suggests, these products are designed to seal flange connections. They are used on many utilities, including water and gas pipelines.

Loctite 518 sealant acts as an impermeable seal. Due to its expansion properties and good adhesion, it creates a reliable barrier between metal flanges without harming their fastening.

The advantages of this tool include:

• resistance to high medium pressure in the line;
• high-quality and fast compaction without residual shrinkage;
• tightness of the coating;
• immunity to aggressive environments;
• uniform filling throughout the available space.

Flange sealants are more effective than conventional gaskets. They are favored by their long service life and the absence of the need for regular replacement. Loctite does not deform (the seal does not break) under heavy loads on the flange connection. In solid form, it does not leave the area even with strong pressure, which is constantly observed in utility lines.

Resistance to damage also plays an important role:

• ruptures;
• abrasion;
• cracking.

The practicality of these products is also affected by the wide range of operating temperatures: from –55 to +150 degrees Celsius. Loctite sealants 5188, 574 and 518 are suitable for steel, cast iron and aluminum flanges, and the red one in the syringe is ideal for sealing joints in cars.

Industrial sealants

Industrial products are known for their good performance. Loctite 5145 is able to withstand the movement of multiple parts without compromising the tightness of the joint. Known for high adhesion and extended service life. These qualities make Loctite products indispensable for industrial needs.

The scope of application of these funds is wide. Sealants are used to seal assemblies, as well as to connect various parts in complex mechanisms.

One- and two-component industrial sealants prevent moisture, gases, steam and small particles from penetrating into the joint. In addition, they are known for the following characteristics:

• good adhesion to most modern materials used for industrial needs;
• weather resistance;
• durability, and aging is not accompanied by deformation/cracking;
• immunity to caustic and aggressive chemicals.

Industrial sealants are silane-modified and butyl. Products of the second type have good adhesion even to glass, ceramic and other smooth surfaces.

Due to their high consumer qualities, Loctite industrial sealants are suitable for modeling/assembling light structures, reducing production costs and increasing the pace of work. They allow you to do without additional fastening devices.

Shaft/sleeve retainers

Loctite sealants in this group are designed for rigid fitting of cylindrical automotive parts, including shafts, bushings and bearings. Having good binding properties, sealants provide a reliable connection to the assembly and increase its load-bearing capacity.

The widespread use of these tools is also due to the correct distribution of the load throughout the entire node. This ensures the safety of mechanical components and reduces the likelihood of premature wear.

Sealants made on the basis of methacrylate are known for the following features:

• perfectly fill the gap;
• protect metal products from the harmful effects of moisture and prevent the development of corrosion processes;
• reduce mechanical fatigue of parts and increase the service life of the entire assembly.

Loctite 660 is the most popular among the line under consideration. This sealant has an activator, due to which full technological strength occurs 15 minutes after application. When cured, it forms a layer 0.5 mm thick.

Main varieties with characteristics

Thanks to a wide range of adhesive and sealing compounds, as well as special means that protect mechanisms from the negative influence of the environment and contact substances, Loctite adhesive can be selected for any user’s needs.

Loctite adhesive can be selected to suit any user's needs.

Loctite 243 glue

This is a one-part anaerobic sealant that serves to tightly connect two threaded parts. Thanks to the use of a clamp, there is no self-screwing effect, which is especially noticeable in units with a high degree of vibration. The form of production is a spray equipped with a spray dispenser.

Main technical characteristics:

• Has medium strength;
• The polymerization effect occurs in an anaerobic environment, that is, in the absence of air. Intensively hardens in the gaps between contacting metal parts;
• Shows effectiveness on metal products with galvanic coating or stainless steel;
• Thermal resistance level during technical operation is +180°C.

Instructions for use:

1. Surfaces are pre-treated with a cleaner. Loctite 7061 or 7063 is recommended.
2. The sealant is applied.
3. The unit is being installed.
4. Leave for 45 minutes to harden. This is the time of readiness for use.

Thanks to the use of a clamp, there is no self-screwing effect, which is especially noticeable in units with a high degree of vibration.

Loctite 243

This thread locker is used to seal elements and prevent them from screwing together. It has average fixation strength and, after application to contacting surfaces, is ready for use after 45 minutes of exposure. Works on interacting metal-to-metal surfaces. The temperature range of exposure is allowed at the upper limit of +180°C. Release form: tubes with a sprayer, volumes from 10 ml to 1 liter.

This thread locker is used to seal elements and prevent them from screwing together.

Loctite 401

This adhesive composition has a cyanoacrylate base and has a wide range of applications.

Specifications:

• Effective for materials that are difficult to bond;
• Foreign moisture does not have an intensive effect on the vulcanization process and time;
• Operating temperature range from -40°C to +120°C;
• Suitable for bonding rubbers, metals, porous surfaces (wood, paper, fabric, leather), plastics and polyolefins.

Mode of application:

1. Clean the surface using Loctite 7063.
2. Spread the composition sparingly over the surface.
3. Connect the parts, fixing them for 5 to 10 seconds. Primary setting occurs.
4. Dry at room temperature, as in this case vulcanization occurs faster and better.
5. Can be used after 24 hours of drying.

Effective for materials that are difficult to bond.

Loctite 406

One-component adhesive on a cyanoacrylate base with a low viscosity level. Fast-acting and suitable for surfaces that are difficult to bond with other compounds.

Specifications:

• Suitable for elastomers, plastics and other plastics, rubber and natural rubbers. Suitable for fixing metals;
• Operating temperature range from -40°C to +120°C;
• Has medium strength.

Mode of application:

1. Using Loctite 7063 cleaner, treat surfaces to remove grease and dirt.
2. A thin layer of glue is applied to one surface.
3. Avoid excess composition as this will prolong the curing time.
4. Connect to surface 2 and fix for 10 seconds.
5. After 1 day of complete drying under natural room conditions, the product can be used.

One-component adhesive on a cyanoacrylate base with a low viscosity level.

Shaft-sleeve clamp Loctite 638

Refers to fasteners of anaerobic principle of action, used for connections operating on the principle of a shaft - a cylindrical hole. The play between them in this case should not be more than ¼ mm (that is, 0.25 mm). With its help, the greatest strength of fixation of the parts to be worn is achieved when drying and operating at a temperature range from +100C to +230C. Most often they are fixed in cylindrical holes in the bushing body, and also for securely fastening the inner rings of the bearing to the shaft.

Specifications:

• Operating temperature range -55°С…+180°С;
• Primary fixation occurs after 4 minutes;
• The product can be fully used after 24 hours when dry at a temperature of +22°C.

Directions for use:

1. To obtain effective fixation, surfaces are cleaned and degreased with products from the same manufacturer.
2. The gap between the shaft and the bushing or sleeve must be completely sealed with this locking compound.
3. If this type of anaerobic composition is used for a sliding joint of parts, then it must be applied around the pin and only along the front part of the part being put on, for example, a bushing.
4. If it is necessary to assemble elements for a press-type landing connection, the retainer is applied both to the shaft and to parts with a cylindrical hole.
5. Next, the parts are placed on top of each other. In order for the latch to completely fill the space, it is necessary to rotate them around the axis.
6. After installation, do not expose the parts to mechanical stress until they are completely dry for 24 hours.

With its help, the greatest strength of fixation of the worn parts is achieved when drying and operating at a temperature range from +100C to +230C.

Popular materials

The line of these products is very diverse, as is the price range. This allows you to choose the right product for each task or find a universal composition with a wide spectrum of action. For convenience and easy orientation, it is worth considering several of the most well-known models.

Loctite 5900

Popular one-component black sealant. Hardens at room temperature. Known for its increased resistance to motor oils. Among the advantages it is worth highlighting:

• no shrinkage and corrosion;
• wide temperature range - from –55 to +200 degrees Celsius;
• hardening at room temperature.

The sealant is intended for hydraulic and pneumatic connections. Suitable for filling metal threads that have small gaps.

Loctite 290

Well-known threadlocker with low viscosity and good strength. It has a smaller temperature range than Loctite 5900, but prevents loosening of the alignment of elements and the formation of leaks in the assembly. This sealant is suitable for M6 type connections and is actively used in carburetor screws, as well as in instrumentation.

Teroson MS 9220

Another equally popular remedy that deserves attention. The structural MS-polymer sealant has a one-component composition (cures upon contact with a moist environment). It has a characteristic black color and is used in the production of:

• automotive technology;
• railway cars;
• semi-trailers;
• sea ​​vessels.

Teroson MS 9220 has excellent adhesion to galvanized steels, Teflon, glass, aluminum and other materials. Withstands short-term exposure to +120 degrees Celsius.

Application rules

Before applying Loctite sealant, the surface must be completely cleaned of dust, dirt, moisture and oil stains. To remove carbon deposits, you can use a stiff brush, as well as various degreasers.

Next you need:

1. Thread the tube into the gun.
2. Squeeze out the gel and apply it evenly to the surface.
3. Press the product tightly.
4. If necessary, carefully remove excess sealant.

In the professional field, a sealant syringe is often used. It is applied without a gun and is immediately ready for use. This product is indispensable for service stations. Before further use of the mechanism or assembly, you must ensure that the sealant is completely cured and ready for use.

Rules for using glue

When the consumer learns what Loctite is and what properties it has, it is necessary to imagine the general methods of using adhesives and sealants. Here are the manufacturer's recommendations:

• Surfaces must be degreased. Only in this case will the adhesive properties manifest themselves intensively;
• It is recommended to apply the composition to one surface. And only if it is written that both parts need to be lubricated, perform such a manipulation;
• Avoid excess sealant or glue, as this prolongs the time of fastening the parts and may negatively affect their fixation relative to each other;
• Be sure to wait the specified time until it dries completely. It usually lasts from several hours to 1 day. The only exception is Loctite super glue.

It is recommended to apply the composition to one surface.

With Loctite products from Henkel, the consumer will always find something that can satisfy his needs for fixing materials.