aquarium silicone vs regular silicone

Aquarium silicone vs Regular silicone

When it comes to aquariums, there are a few things that you don’t want to cut corners on, especially ones that affect the safety of your fish. One of those is the sealant you use to create your tank’s lid and seams.

Silicone is a common material for security, as it is inexpensive and waterproof; however, not all silicone can be used for aquarium life.

So, what’s the difference between aquarium silicone and regular silicone? Which should you be using for your tank? Keep reading for all the answers.

What is Aquarium silicone?

Aquarium silicone is a type of silicone specifically formulated for use in aquariums.

Formula: Aquarium silicone is made from a variety of different materials, but the most common type is silicon dioxide (SiO2). This material is found in sand, glass, and many types of rocks.

Silicon dioxide is very resistant to heat, water, and chemicals, making it an ideal choice in aquariums.

Features: It is made to be safe for fish and other aquatic creatures. Such a product can resist water and salt degradation. Aquarium silicone is also available in various colors, though clear silicone is the most popular choice.

Aquarium silicone is also clear, which allows light to pass through it. This feature makes it ideal for creating aquarium backgrounds or using in place of glass in some aquarium designs.

Uses: Aquarium silicone has many uses, including sealing aquariums, holding decorations in place, and creating custom shapes and designs. It is also frequently used to repair leaks in aquariums.

Aquarium silicone is available in both liquid and gel form.

  • Liquid aquarium silicone is easy to apply and can be used for a variety of purposes.
  • Gel aquarium silicone is thicker than liquid silicone and is better suited for creating custom shapes and designs.

Aquarium silicone is typically sold in tubes or bottles, and it can be found at most pet stores or online retailers.

What is Regular silicone?

what is aquarium silicone

Formula : Regular silicone is a type of synthetic rubber that is made from silicon, oxygen, and other ingredients.

Features: It has many benefits over natural rubber, including its resistance to heat, cold, and UV light.

Regular silicone is available in various colors, including clear, white, black, and red. It can also be translucent or opaque.

Uses: Regular silicone can be used in various applications, such as seals, gaskets, and adhesives; therefore, it is used in many industries, including the automotive, aerospace, and construction industries.

There are two main types of regular silicone: non-reactive and reactive.

  • Non-reactive silicone does not cure when exposed to air, while reactive silicone will cure when exposed to air.
  • Reactive silicone is often used in medical applications because it forms a strong bond with human tissue.

Differences Between Aquarium and Regular Silicones

Aquarium silicone vs Regular silicone

Aquarium silicone is the best choice for use in an aquarium environment. If you use regular silicone in your aquarium, be sure to clean it regularly.

  • Aquarium silicone is more flexible than regular silicone, making it less likely to crack or break under the weight of water or rocks.
  • It is also more resistant to algae and bacteria growth, making it safer for use in an aquarium environment.
  • Regular silicone can be used in an aquarium environment, but it is not as well suited for the task as aquarium silicone. Regular silicone is more likely to crack or break under the weight of water or rocks, and it is also more susceptible to algae and bacteria growth.
  • Aquarium silicone is more expensive than regular silicone, but its superior performance is worth the investment. A
  • Aquarium silicone is typically clear, while regular silicone may be opaque. Regular silicone can also discolor the water.

Frequently Asked Questions (FAQs)

Can you use regular silicone in fish tanks?

In general, regular silicone is not appropriate for use in fish tanks since it typically contains chemicals that can harm the fish and plants kept in the tank. So it would be best if you used silicone aquarium sealant instead. Aquarium-safe silicone does not contain any toxins, and it is designed to create a waterproof cushion that will not be affected by prolonged exposure to water. Although aquarium silicone is generally more expensive than regular silicone, its superior performance is worth the investment for a happy and healthy aquarium environment.

How long should silicone dry before adding water aquarium?

Depending on the thickness and length of application, it is preferable to let the silicone cure for at least 24-48 hours before adding water to the aquarium. This process allows the silicone to harden and dry thoroughly, creating a safe and reliable seal around any cracks or crevices in the walls of the aquarium. During this time, you must keep the aquarium away from heat or cold sources, as exposure to high temperatures can cause the silicone gasket to soften and weaken. Another thing to note is that after drying is complete, you should slowly pour water into the tank to be careful not to put extra pressure on the silicone seal. This will help ensure that your new aquarium doesn’t leak for years.

What kind of silicone is safe for aquariums?

For the best aquarium-safe silicone, you should choose special silicone that is both water- and food-grade, non-toxic, and capable of forming a waterproof layer on any material. It is often labeled as “saltwater safe” and is water resistant, so it won’t degrade or become brittle over time. It is also essential to check that the aquarium’s silicone does not contain additives, such as biocides, which can harm the fish and other organisms in the tank.


The winner is aquarium silicone. This type of silicone is specially formulated to be safe for fish and other aquatic creatures, making it the perfect choice for your aquarium projects.

Now that you know the difference between aquarium silicone and regular silicone, you can make the best decision for your next project. Have you ever used aquarium silicone before? What was your experience like? Let us know in the comments below!

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