Comprehensive Guide to Using Epoxy Adhesive

How to Use Epoxy Adhesive to Connect Different Surfaces

Epoxies are known as extremely strong bonder in the industry. If you work with fiberglass, wood, cement, metal, or plastic and need an extremely strong bonder, these adhesives can be the best option. You can carry out your project with complete confidence by choosing an epoxy adhesive that fits the materials you are working with. In this article, we tried to acquaint you with the correct way to use epoxies. You will get the best results in your projects by using the tips and notes provided in this article. You can guarantee success in your project by buying the right epoxy adhesive.

A basic introduction to epoxy adhesive

Epoxy is a two-part adhesive consisting of resin and hardener. In order to use this adhesive properly and efficiently, its ingredients have been placed in separate containers. When you plan to adhere to a piece, all you have to do is mix the two ingredients. In order to get the right mixture, the ratio of the two materials must be proportional to the type of work you want to do, as well as the type of epoxy adhesive. When the parts have not yet cured, they may move and relocate. Therefore, in order to get the best results from using these adhesives, you should give it a few hours. After this period, the adhesive will reach its optimal strength.

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Epoxy adhesives are used in various industries due to their extremely strong adhesive properties. These products are used as permanent connectors of homogeneous and non-homogeneous surfaces, leakage of service lines, repair coating of equipment and supplies, etc. When examining the price of epoxy, note that these materials differ in terms of variety and strength, and this affects their price. Their variety and high strength make them a good choice for use in construction projects. Other applications of epoxies include crack and void filling. This feature has made this product widely used in renovations. In addition, epoxy has the ability to be sanded, perforated, or painted. These properties have greatly expanded the applications of this standard adhesive and have in fact doubled the use of epoxy.

Properties and benefits of epoxy

Epoxies are used as a versatile adhesive in the industry due to their high strength and excellent chemical and environmental resistance. Among the properties and benefits of using this product are:

  • Easy to use on all surfaces
  • Leveled stress distribution
  • Resistance to vibration and shock
  • Electrical insulation
  • A lifespan of more than 50 years
  • High resistance in alkaline and acidic environments
  • Void filling properties
  • High resistance to corrosion in different climate conditions
  • Resistant to temperature cycles
  • Protects against moisture and sunlight
  • No shrinkage and expansion after drying
  • Room temperature curing

Step by step with how to use epoxy adhesive

In this part of the article, we have explained how to use epoxy adhesive step by step

  1. First, store the resin and hardener at room temperature (at least 10 ° C). This will make the adhesive better prepared for the bond
  2. The surfaces you intend to work with epoxy should be thoroughly cleaned and dried and free of any grease or dust. You can use different solutions such as ethanol, methanol, or acetone to clean these surfaces. In addition, before using the adhesive, you should remove the excess waste from the surfaces by using sandpaper and clean the resulting dust. You should adhere the two surfaces together in less than an hour after cleaning the surface; because after this time, you will have to do the cleaning process again.
  3. To use this adhesive, you must mix the resin in the kit with a suitable ratio of hardener. For information on these ratios, refer to the technical information section of epoxy adhesives. Under no circumstances should you mix them approximately. Having a special container next to the adhesive when buying epoxy will make the job easier for you. But if there is no container with it and you do not have enough time to buy the container, you can use a plate to mix.
  4. Stir the resin and hardener for at least 3 minutes until you have a homogenous mixture.
  5. There are two main ways to apply epoxy adhesive on the surface:

Spot installation

If you use an epoxy adhesive to install large stones such as slabs, granite, or marble, it is better to put large spots of adhesive in the corners and center of the stone. Then place it on the desired surface.

Layered installation

If you use epoxy adhesive for tiles, ceramics, metal, wood, and concrete, it is better to put a layer of adhesive on the surface and spread it with a thickness of 0.5 to 0.8 mm. Of course, this thickness varies in different levels and according to the type of epoxy.

It is best to read the epoxy adhesive instructions for more details and to get acquainted with the composition. You can use a rubber mallet to test the connection between the two surfaces. Never use a metal hammer to test

6. Finally, remove excess epoxy from the surface using a spatula.

Installing stone with epoxy adhesive

Stone is one of the most important materials in the construction industry. Stone is used for building facades, floors, interior decoration, etc. due to their heavy weight, the safety of installation has always been very important. For instance, when installing a stone in a tower or skyscraper, safety must be very high so that accidents caused by a falling stone would be avoided. Therefore, the installation method and materials used are vital.

One of the safest and most durable ways to install stone is to use epoxy adhesive. Because the adhesion strength of epoxy is very high and it has excellent resistance against bad climate conditions. Epoxy adhesive is a modern method and is a good alternative to traditional methods such as sand and cement mortar or screwing stone to the substrate. In this method, after mixing the two parts of resin and hardener, large spots of glue are placed on the corners and center of the stone, and then it is installed on the desired surface.

The other two cases in which epoxy adhesive is widely used in the construction industry are repairing broken stones and cracks in concrete, and filling gaps, voids, and sealing various surfaces. By first applying the required amount of epoxy adhesive mixture with a spatula on the surface before formation.

Following are some commonly used adhesives in the construction industry:

Megatite S

This adhesive is designed for substructure and spot installation of various stones and ceramics on vertical surfaces. In addition, it has the ability to adhere a variety of concrete, iron and heterogeneous surfaces in the building or install fountains, mirror frames and a variety of stone decorations. Megatite S is also a great choice for fire exposed environments, elevators and stairwells. The mix ratio of this adhesive is 1 to 1 and the POT life at 25°C is 45 minutes.

Megatite C

A transparent epoxy adhesive that can permanently bond surfaces to make them resistant to shock and vibration. This adhesive is designed to connect different surfaces when a transparent adhesive is needed. It is used to install marble, granite, large ceramic tiles inside and outside the building, as well as to connect various types of metal, wood, concrete and other surfaces. The combined ratio of this adhesive is 3 to 1 (3 parts of resin and 1 part of hardener) and the application time at 25°C is 25 minutes.

Repair cracks and seal surfaces with epoxy adhesive

If you see cracks in stone stairs or other concrete and stone surfaces, you can easily remove them with a suitable epoxy.

Megatite LTN, Megatite LTB, Megatite LTC, Megatite LTL, and Megatite LTM are among the Megatite epoxies that are suitable for repairing and regenerating concrete and natural stones cracks. These adhesives are thin and have low viscosity. For this reason, they easily penetrate cracks, grooves, and pores and strengthen them. By adding compatible silica with epoxy resin, you can make grout, mortar, and epoxy concrete with much higher strength than ordinary concrete.

Megatite is a manufacturer of two-part epoxy adhesives for various applications in construction, petrochemical, oil, gas, power, water, and wastewater industries.

If you need a considerable amount of time to position your project pieces after using epoxy, choose an epoxy that lasts longer. Epoxy adhesives reach their initial strength in 5 to 180 minutes, depending on their type, and restraints can be removed. They take at least 4 days to reach optimal strength. With these products, you can manage your time assembling broken stone and concrete parts and shape them to your preference. This product has a high resistance to temperature shocks and can have very high strength.

Repair and bonding of metals with epoxy adhesive

You can use epoxy adhesives to bond metals together Due to the characteristics. This method can be a suitable alternative for welding, soldering, and bolts. Megatite epoxy adhesives are very strong epoxies for bonding metal surfaces. In addition to the Megatite S and Megatite C adhesives mentioned above, the following adhesives are also used to bond metals:

Megatite PM

This two-part adhesive is based on epoxy resin and amine hardeners, which is designed for manual layering on metal and fiberglass pipes and fittings. It can be used in various industries such as petrochemicals, oil, gas, seawater cooling systems, etc. High flexibility and strength after curing, good viscosity, high interlayer shear strength and quick wetting of fibers are the prominent features of this product. The mix ratio of this epoxy is 100 grams of resin and 15 grams of hardener. The time required to fully cure Megatite RT at 25°C is 4 days and at 80°C for 2 hours

Megatite PH

This product is suitable for a wide range of metals that have a temperature resistance of up to 150°C. This adhesive can be used to transport crude oil lines, fire water lines, drinking water, industrial waste and offshore platforms. The mix ratio of this epoxy is 5 to 1 (5 parts of resin and one part of hardener) and the curing time to reach a shear strength of at least 1 MPa at 25°C is 3 hours, and to achieve a shear strength of at least 10 MPa at 100 ° C is 1,5 hours.

Megatite RT

This epoxy is used for metal-to-metal bonding, repair and reconstruction of metal and fiberglass surfaces. Outstanding features of this product include thixotropic properties, temperature resistance up to 100°C and also resistance to most chemicals. The mix ratio of this epoxy is 4 to 1 (4 parts of resin, 1 part of hardener) and the curing time at 25°C to achieve a shear strength of at least 1 MPa is 3 hours and a shear strength of at least 10 MPa is 4 days.


The difference between Megatite PH, PM and RT  with Megatite S and C is that these adhesives are mostly used in industrial applications such as petrochemicals, oil, gas, power, water and wastewater, etc.

Megatite HC

Megatite brand has designed and formulated this product with the aim of planting bolts and bars in concrete. Using it will increase the strength of concrete surfaces. The cure time is 20 minutes at 25 degrees.

Megatite SF

This adhesive has strong adhesion and can be used for emergency repairs of metal and concrete pipes and tanks. This adhesive permanently adheres the surfaces together. The mix ratio is 1:1. It takes 10 minutes to harden at 25 degrees, and reaches its optimal strength within an hour. This epoxy can be used for both construction and industrial applications.

Key points for using epoxy adhesive on wood

If your work involves wood, you will need a quality wood epoxy. Wood epoxies have a high viscosity and do not drip when used. Megatite brand has formulated adhesives for working with wood that have high strength and durability. These epoxies include Megatite C and Megatite SF. The time required for these products to cure is 10 to 45 minutes at 25°C.

Epoxy adhesive for fiberglass

Fiberglass products come in all shapes and sizes, from park benches to car parts and industrial pipes. Despite fiberglass products in most industries, it is not surprising that some of them need occasional repairs. Imagine for example a hole in a GPR tube! In these cases, Megatite PM adhesive is suitable and available as an epoxy adhesive for pipeline contractors. Megatite RT adhesive can also be used for manual layering on fiberglass-based products such as GRP, GRE, ABS, SMC, etc.

To ensure proper adhesion of the two surfaces you intend to bond with epoxy, make sure that the surfaces are completely clean and dry. If the surfaces used are smooth, first sand the surface slightly using sandpaper. It can be used on plastic, wood, stone, and ceramics surfaces. This product is resistant to bad climate conditions, sunlight, and vibration.

Infiltration into dry and wet substrates with marine epoxy

If you are looking for a suitable adhesive for use on offshore platforms, Megatite RT and Megatite PM can be the best option. These epoxies are two-part adhesives with room temperature curing. These products have resistance to corrosion and abrasion and for this reason are used in repair, reconstruction, permeant connection, and repairing leakage. These epoxies are extremely strong and versatile, which makes them a great tool for surfaces that are constantly submerged in water.

Marine epoxy is used to protect ship hulls from corrosion and destruction in the marine environment, to increase the abrasion resistance of ship decks, and to prevent ship moss, which causes corrosion and slows down ships. This marine epoxy resin can also be used in corrosive fluid transmission lines, oil transmission lines, fire water lines, etc. To use this adhesive, you have to mix all the hardeners with all the resin. Stir for 3 minutes and place in a 0.5 to 0.8 thick layer on surfaces.

Say goodbye to epoxy adhesive stains

When buying epoxy adhesive, put in mind the fact that this material has high durability; Therefore, you should keep the surface clean when using it. Because the remaining stains are difficult to remove. But if you have spilled some epoxy on other surfaces while working with the adhesive, do not worry, just solve the problem by reading some tips on cleaning epoxy.


Removal of cured epoxy

If your epoxy has cured and hardened, you should use a relatively aggressive method. Using most solvents, thinners, and alcohols will not help soften the epoxy. To remove the cured epoxy, methods such as burning, sanding, and heating above 200 degrees should be used.


Removal of uncured epoxy

Uncured epoxies are soft; therefore, they are easier to clean than cured ones. You can use acetone or isopropyl alcohol to remove the caused stains. To do this, you have to dip a piece of cloth in them and clean the stained surface. This should continue until the adhesive comes off the surface.

Removal of epoxy from the skin

If the epoxy has been spilled on your skin, it is best to remove it as soon as possible. The best option is to use a natural substance such as vinegar. Dip a cotton ball in vinegar and rub it on the affected area. Of course, the use of soap and water will also be effective. But if this substance comes in contact with the eyes, rinse immediately with plenty of water for 20 minutes. In cases where epoxy has been eaten, do not attempt to vomit. It is best to keep the patient warm and see a doctor immediately.


Solve problems with epoxy

It can be said that epoxies are the best anti-corrosion coatings. So that if you cover the surface with epoxy, it will become a waterproof, Anti-shock, and anti-corrosion surface. The anti-corrosion properties of epoxy increase the importance of its use in various industries. The chemical structure of epoxies makes this material have a very high adhesion property. This adhesion property of epoxy helps to withstand the stresses of the upper layers in this material. These features ultimately lead to no cracking or fracture of the final surface. Epoxy can be formulated in different ways and therefore has a variety of applications. By using high-quality epoxy, you can save a lot of money and increase the quality of the final product.

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