Gelcoat - what is it? Application, properties, types of gel coat

If you have found on sale gelcoat, this is what, you certainly should be interested. This material is used to obtain a qualitative finish on the surface of a composite material that is fiber reinforced. A number of common gelcoats are made on the basis of unsaturated or epoxy polyester resins.

general description

The described materials act as a modified resin, which is applied in a liquid state to the matrix. After the curing process is completed, polymers are formed which have cross-linking. The next step is the reinforcement of the composite polymer base, usually a mixture of fiberglass and polyester resin or epoxy resin with carbon fiber or glass fiber. If you are interested in gelcoat, this is what you will be able to read in this article. It is used to produce a glossy colored surface that can improve the appearance of products and their aesthetic qualities. Quite often, sea vessels and large yachts are made using composite materials, while the outer layer, which consists of gelcoat, has a thickness in the range of 0.5 to 0.8 millimeters.

Material Features

If you decide to buy gelcoat, this is what it will be important to know before making a purchase. In order to provide a more impressive resistance to hydrolysis and exposure to sunlight, special versions of the described material are being developed, which has higher physicomechanical qualities. Specialized varieties can be used to form a matrix, which are used to make the products themselves. This area of use implies a high level of strength, which will be sufficient to overcome thermal and mechanical stresses. The latter arise during the rejection of composite surfaces, as well as the removal of products from the matrix. If you are considering gelcoat, that's what it is, it will be important to know. It can be made from resins that have different origins. However, the most common are materials made of epoxy resins and unsaturated polyesters.

Main characteristics

If you decide to buy gelcoat, the application of which was described above, it is important to get acquainted with the basic quality characteristics, among them you can highlight the impressive physical and mechanical properties, as well as resistance to ultraviolet, moisture and a variety of environmental factors. Pigments and premium-quality base resin are used in the manufacture. The gelcoat also differs in its low emission of harmful components. For a variety of applications for sale, you can find a wide range of this product.

Application Features

Gelcoat, the properties of which are described in the article, contains some dangerous components by the type of styrene. It can cause the development of an allergic reaction. It is important to take into account before use that the material is flammable and harmful for inhalation, since it irritates the respiratory system, eyes and skin. It is important to note that gelcoat can cause serious damage to health if you inhale its vapors for a long time. The master should keep the material as far away as possible from sources of ignition, do not smoke during use, try not to inhale evaporation, and in case of contact with eyes rinse with plenty of running water and consult a doctor. Before applying, wear protective clothing for face and eyes, as well as gloves. Use the material only in well-ventilated areas. In case of fire, it is recommended to use foam, water spray, dry chemicals, water mist.

Recommendations for use

If you have found a gelcoat for sale, what you need such a material for, you can read in the article. Already before use, you can read the rules of use. Thus, the temperature of the material and equipment should not exceed 25 degrees, but should not fall below +18 degrees. If the temperature is excessively low, the solidification step will not succeed. This can cause defects. Before use, the material should be mixed in a container, and then put the necessary amount in a container, the volume of which will be sufficient to add 2% of the catalyst. Ingredients should be mixed thoroughly after the joint. Applying the gelcoat should be done by brush in two layers, you need to do this with the utmost care to get even layers without bubbles and dents. Between the layers it is important to wait time for hardening.

Features of applying gelcoat for spraying

On sale you can find gelcoat, intended for spraying. It is important to apply several thin layers, without waiting for the drying of the previous one. At the same time, the nebulizer must be installed at the lowest pressure, with a nozzle of small diameter. It is important to wait about 4 minutes between layers to release air. The final thickness of the gel coat is 0.8 millimeters.

Types of gelcoat

Gelcoats, presented by manufacturers in a variety of varieties, used in the role of the outer color layer, are not the only option. Substances by the method of application can be divided into internal and external, the first of which are called polyester enamels. Another type is the topcote, which is applied inside the body, made of fiberglass. This makes the surface even more attractive. Such a substance passes quickly to the solidification stage, because during the manufacturing process, wax is added to its ingredients.

Conclusion

Gelcoat, properties, the types of which have been described in the article, can be purchased by you in the store of the corresponding goods. It is important not only to choose the right material, guided by the instructions on the package, but also to approach the application step properly.