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How to choose aquarium silicone sealant

Fans of ornamental fish often cannot decide which aquarium sealant is better in quality and composition. It is important to choose glue that will not be toxic or harmful to aquatic creatures.

Modern manufacturers provide a wide range of products, and choosing aquarium sealant is not difficult if you know some of the features.

Silicone sealant for the aquarium should be non-toxic to fish

Sealants are classified based on the composition of the base and the interaction between the bonding materials. In accordance with the basis of the following types of glue:

  • acrylic;
  • polyurethane;
  • thiokol;
  • bituminous;
  • silicone.

All types of sealants are one-component and two-component. Single components are simpler and easier to use, have a longer shelf life.

Before using the two-component one, it is necessary to pre-mix the reagents in order to obtain directly the adhesive mass.

The advantages of a two-component adhesive are higher density and strength compared to a single component.

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There are special requirements for aquarium sealant. Since the sealant for the aquarium should not be auxiliary substances in the form of solvents, oils, fungicides and other additives that can adversely affect fish and plants, you should choose all-silicone glue.

Silicone for the aquarium when interacting with water does not emit toxic substances.

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Silicone sealant for the aquarium should be highly elastic and quickly harden in air. Silicon in the composition of such silicone glue allows you to achieve the desired strength, flexibility and softness of the compound.

Due to its properties, silicone glue prevents the appearance of cracks on the glass under the load on the seam.

The structure of the aquarium adhesive consists of the following components:

  • silicone rubber base;
  • adhesive part;
  • plasticizer;
  • strength amplifier;
  • vulcanizer;
  • dye.

Any dye can affect the composition of the water in the aquarium.

The basis of the glue is artificial rubber, which has a high temperature. The adhesive provides a reliable connection of the binder with the surface, the plasticizer gives increased elasticity.

In addition to these components, the composition also contains an amplifier of strength and a vulcanizer, which turns the viscous mass into a dry plastic substance.

Depending on the presence of pigments, aquarium silicone may be transparent, black or white. Most often, black silicone is used to impart a decorative effect to an aquarium, but one should not forget that any dye can affect the qualitative composition of the water.

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Silicones are divided into acidic and neutral. Acidic silicone is often used in construction work, but it can also be used when sizing aquariums or terrariums.

The main disadvantages of this glue are acetic odor and a long drying time. Until the acetic acid vapors disappear one hundred percent and the glue dries completely, the glued container must be held empty for several days.

Then for some time you need to leave the aquarium with water, while the water must be changed frequently.

Neutral sealants do not have odor, have adhesive properties higher than that of acid silicones, but the price is correspondingly more expensive. If it is difficult to decide which silicone for the aquarium is better to choose, then, undoubtedly, it is worth purchasing a neutral one.

To buy silicone for an aquarium, you need only the one on which there is a special mark – the inscription “Aquarium” or the pictogram in the form of a fish. It is important to pay attention to the date of manufacture, because after the expiration date, the adhesive loses its qualities.

It is better to give preference to well-known trademarks with a name that have already established themselves as reliable manufacturers. Before finally choosing which sealant is better for an aquarium, it makes sense to first try several options of silicone glue. The most popular and proven manufacturers:

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Experienced aquarists when working with glue follow simple rules. So, excess or old sealant is best removed with a blade.

Excess acid silicone is removed with a piece of cloth soaked in vinegar. When a crack appears in the upper part of the aquarium, you must use a glass lining that is pre-sewn.

Excess silicone is best removed with a blade.

If air bubbles are found in the fresh seam, they can be removed by adding a new portion of glue followed by a screed on the walls of the aquarium. When air is detected in the already frozen silicone, it is necessary to fill the empty spaces with a sealant with a syringe.

If the bubbles are large in diameter or are in the middle of the seam, it is worth re-sticking the connection.

The strength of the seams depends on the exact adherence to the technology of glass gluing. Do not neglect the rules: You must carefully prepare the surface for bonding and be sure to degrease.

Before you start using the tank, you need to wait until the silicone is completely dry. Using a special screed for the aquarium will help to achieve better fixation of glass.

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