Educational articles, Safety tips and storage conditions

What is stone glue؟ What are its uses؟

This two-component product is based on epoxy or polyester resins. It is used for gluing and connecting granite, various types of ceramics, construction stone facades and prefabricated cement pieces, large ceramics and large iron plates.

Features of stone glue:

1_ Making connections in the shortest possible time

2_ The stone glue has excellent strength and stability.

3. With high strength and stability, it maintains its quality under any conditions.

4_ Moisture resistance and water absorption

5_ Ability to fill empty spaces and cracks on the surface of the stone

Types of stone glue according to structure

1_ Polyester stone glue

These adhesives are based on polyester and due to their relatively low cost, ease of use and speed of operation, they are among the first choices of manufacturers . They can be used in all construction works for sealing or gluing. These adhesives are relatively more stable against color change under ultraviolet radiation compared to epoxy type.

These products can be stored at room temperature and should not be placed at a temperature higher than 75 degrees Fahrenheit (24 degrees Celsius) .Because high heat and cold have a negative effect on the useful life of these adhesives . Therefore, be sure to avoid placing them under sunlight or conditions that allow freezing or melting.

2_ Epoxy stone glue

One of the paste adhesives that is available in one-component and two-component packages in the market is called epoxy glue. Epoxy adhesives are based on epoxy base, and in adhesives where epoxy is a single component, the components in the formulation are already combined, and it should be noted that for Reacting must be under high temperature.

These types of adhesives should be stored at low temperature or sometimes in the freezer. But about the two-part epoxy glue, it should be said that they consist of two separate parts and you should combine it with the specified ratio to have an acceptable adhesion.

Epoxy stone glue should be used immediately after the combination, otherwise the glue will harden and cannot be used. You should also throw away the amount of extra glue left.

They are used for gluing various stones, including natural stones, glass stones, ceramics and fiberglass. These adhesives have high adhesive strength, resistance to environmental factors and good strength.

3_ Powder stones glue

Powdered stone glue is another type of stone glue, which is often called tile glue. This type of adhesives should be used by adding water to it, and because resin is located in their structure and this resin is combined with water, the strength of adhesion is They have a good ratio and are suitable for gluing all kinds of ceramic tiles. It is worth noting that these adhesives should not be used for plaster surfaces.

The process of choosing the right stone glue

Choosing the right stone glue depends on several factors such as the type of stone, application conditions, environment and conditions used. To choose the right stone glue, the following steps can be followed:

Determining the type of stone

The type of stone is very important and must be predetermined. Types of stones include granite, marble, limestone, ironstone and artificial stones. Each type of stone needs its own glue.

Application conditions

Application conditions include ambient temperature, number and size of joints, type of loading and environmental conditions. Determining these conditions can help in choosing the right glue.

Checking the characteristics of the adhesive

Adhesive characteristics include corrosion resistance, heat resistance, moisture resistance, oil and fat resistance, adhesion to different surfaces, and hardness. Important features should be examined and compared with the type of stone and the conditions of application.

Adhesion test

Before using rock glue, an adhesion test should be performed to ensure that the glue used is suitable. To test adhesion, place the adhesive on a small sample of rock and check the adhesion after a certain period of time.

Manufacturer’s advice

Some glue manufacturers recommend a suitable glue for each type of stone and according to the type and characteristics of the stone. For example, for pluripotent stones such as marble, adhesives with high adhesion capability and a suitable flexibility factor are recommended. On the other hand, for stones with dry and non-sticky surface such as granite, adhesives with high adhesion and density are used.

To choose the right glue, one should pay attention to the physical and chemical characteristics of the stone as well as the characteristics of different adhesives. Also, attention should be paid to the recommendations of stone and glue makers and expert advice and related experts should be used if necessary.

Teaching how to use stone glue

Preparation of stone attachment site

One of the most important factors that you should consider for using stone glue is the correct preparation of the local principles on which you intend to stick the stone.

*Clean the desired surface from any dust, oil and pollution.

*If the surface is under cement work, be sure to completely soak the surface with water several times before starting the project.

*If the desired surface is made of tiles, you must hit the tiles with an ax or hammer to make them uneven.

*To stick the stone on the plaster wall, you need to prepare the bed from the previous day. For this purpose, cover the surface completely with a primer twenty-four hours before starting the project.

Stone glue preparation

Before consumption, you should remove the stone glue from the main container only as much as you consider using it and stir it completely. After the solution is even and only 15 minutes before starting work, add the hardener to the container.

For example, Hardner’s allowed consumption is only one percent of the total volume of rock glue.

Note that if you intend to use a kilo of stone glue, you must mix ten grams of hardener with it. After using the stone glue, do not transfer the remaining mixture to the main container under any conditions.

Adhesive application

Apply glue to the surface of the stone using a brush, pulley or glue ointment. If needed, you can use other tools such as adhesive brushes.

Connecting parts

To connect the stone pieces, press them together and it is better to use glue to keep them connected to each other.


After applying the glue, it is better to wait for it to dry completely. The drying time may vary depending on the type of glue and environmental conditions. After drying completely, the stone pieces will be connected.

Safety tips when using adhesive stone

Do not forget glasses and safety gloves when using stone glue

Keep the product away from children at a maximum temperature of 30 degrees Celsius.

Avoid smoking when using stone glue and place it away from the heat source.

The desired place must have proper ventilation.

If the stone glue enters your eyes, wash it quickly and see a doctor immediately.

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