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Best Glue for Aquarium Glass: Our Top Picks 2024

If you need some good glue to repair aquarium glass, you’ve come to the right place. Let’s take a look at the top five options that the market has to offer. 

Best Glue for Aquarium Glass

Top 5 Best Glues for Aquariums Glass: Reviews

Let’s examine the top five options out there in terms of the best glue to help repair that aquarium glass.

1. Clear Aquarium Silicone Sealant: Our Top Pick

Clear Aquarium Silicone Sealant - 10.2 Fluid oz Cartridge
  • Container size: 10.2 Oz. This high modulus component RTV Silicone Sealant forms strong cohesive...
  • The bonds are unaffected by continuous immersion in water and, when fully cured, is non-toxic to...

Here we have a 10.2 ounce container of high modulus silicone aquarium sealant. This is a type of sealant that forms a very strong bond with aquarium glass without the need for any primers. The bonds created by the sealant are totally unaffected by continuous emerging in water, and are also very resistant to temperatures and movement.

It can withstand temperatures ranging from – 70 degrees up to 450 degrees Fahrenheit. In fact, this is by far one of the most durable aquarium sealants out there.

Even better is the fact that once this product is totally cured, it is also completely safe for fish. You may also like how this product features optimal resistance to this coloring, so it won’t start to become yellow over time. 

What’s also nice is that this product can be used with both saltwater and freshwater aquariums. It’s also an ideal option because it does not run or slump, so it can be applied to vertical surfaces.


  • Long-lasting
  • Very durable
  • Ideal for tanks of all sorts
  • Withstands extreme temperatures
  • Affordable


  • Requires a caulking gun

If you want a whole lot of reliable aquarium glue for a low price, this is probably your best bet.

2. Sdintar Glass Glue

Glass Glue, Glue for Acrylic, for bonding Between Glass and Glass,Glass and...
  • 【Wide application】Suitable for bonding glass, acrylic, glasses, crystal, DIY craft, mirror,...
  • 【Precision Tips】Each glue comes with three precision tips. Provides more choices in application!...

Although this is technically not labeled as aquarium glue, it is 100% non-toxic, and should therefore be totally safe for fish once it has been cured. It should not release any toxic materials into the water whatsoever, and it is 100% waterproof.

This is a very long lasting and specially formulated type of glue that works really well for glass, plexiglass, acrylic, and any other such material that an aquarium could possibly be made out of what’s also stands out is that it can resist extreme temperatures ranging from – 45 up to 95 degrees Celsius. It is also totally transparent and should not fade or discolor over time, although prolonged exposure to UV light may cause it to become slightly yellow.

Due to its special formula, it is also something that you can use for both horizontal and vertical applications with ease. All in all, for the relatively low price it comes in at, this is by far one of my favorite products on the list today.


  • Color resistant
  • Very strong bond
  • Works for most aquarium materials
  • 100% waterproof
  • Safe for fish


  • Sunlight may cause discoloration

If you just need a small bottle of aquarium glue, this is probably your best option.

3. Aqueon Silicone Sealant

Aqueon Silicone Sealant Clear 3 Ounces
  • Waterproof seal stops leaks
  • Permanently flexible; does not crack or shrink

What we have here is some very high-grade aquarium silicone sealant designed to fix aquarium glass. This is an extremely durable and long lasting sealant that if treated properly, should last for several years to come. It should not crack, shrink, or expand once it has been cured.

 Speaking of curing, once it is fully cured, it should be 100% totally non-toxic for use with both saltwater and freshwater aquariums. It should not leach any harmful substances into the water whatsoever. Even better is that it is permanently flexible, so there is a little bit of movement to account for impact and general movement.

Furthermore, this product should also not discolor with time, even with exposure to UV light. It also comes in a tube with an applicator cap that makes it very easy to apply with great precision. Of course, it is 100% waterproof, so it should be fine for use with aquariums of all sorts.


  • Very easy to use
  • Non-toxic and fish safe
  • Does not discolor
  • Very long lasting bond
  • Ideal for use with salt and freshwater tanks


  • Somewhat expensive

This is a great option to consider if you need something reliable and you are willing to invest a few extra dollars.

4. Loctite Clear Silicone Waterproof Sealant

Although this product is primarily designed for construction purposes, it is labeled as being aquarium safe. This means that once it is totally cured, it should not leach any toxic substances in the water, and it should not be harmful to your fish in any way.

If it’s strong enough to be used for construction purposes, then it should also be more than strong enough to be used as aquarium sealant. In fact, this is likely some of the strongest glue on the list today, and is compatible with a very wide range of materials. Also worth noting is that it shouldn’t peel, shrink, expand, or crack once it has been cured. This means that it should perfectly seal any leaks or seams on your aquariums.

Furthermore, thanks to its special nature, you should also be able to apply it vertically and horizontally alike, with minimal effort. Thanks for being flexible, it should also have great impact resistance. Of course, it is also designed to be 100% waterproof, so you should have no problems using it for aquariums and related purposes.


  • Flexible
  • Impact resistant
  • Very durable
  • Cost effective
  • Easy to apply


  • May discolor over time

If you are looking for a great waterproof sealant that can be used for virtually any purpose, this is likely the best option at your disposal.

5. DAP 688 Purpose 100% Silicone Raw Building Material

Here we have some more very high-quality all-purpose adhesive and sealant that is made with silicone rubber. Being made with silicone means that it is compatible with aquarium glass, acrylic, and virtually everything in between. It forms an extremely strong bond that is almost impossible to undo, and yes, it is totally waterproof.

It should be fine for aquariums of all types, and this includes both saltwater and freshwater tanks. This product should be completely and totally non-toxic to all freshwater and saltwater fish once it is cured.

However, it does also stay completely flexible, which means that it can handle some movement and impact. I also like how it comes with a special applicator nozzle, as applying it in a precise manner is made easy and efficient. 

Thanks to its formulation, it is also something that can be used for vertical applications without running down everywhere. In case it matters for you, it is compatible with a wide variety of materials.


  • Long-lasting
  • Dries clear
  • Easy application
  • Cost-effective


  • May discolor over time

If what you need is a durable, flexible, and solid bond, then this is always a great product to consider.

Glue for Aquarium Glass Buyers Guide: What to Look Out For

Let’s quickly take a look at some of the most important considerations for you to keep in mind when choosing the best glue for your aquarium.

Intended Purpose

Always pay attention to the intended purpose of the product in question. It is always best if you go for a product that is specifically intended for aquariums, although some multipurpose or all-purpose adhesive may do just fine, so long as they can bond with glass or acrylic, and are waterproof.

Water Resistance

Of course, when you’re talking about aquariums here, which means that you need a product that is totally waterproof. Once it is cured, no amount of water, even if fully submerged, should be able to undo the bond.

Closeup image of Applying silicone sealant by Caulking gun

Temperature Resistance

The product in question should also be very resistant to temperatures. Temperatures for various aquariums can differ quite greatly, and external temperatures need to be accounted for as well. Something that can handle both extreme heat and cold is recommended.

Impact Resistance

You always want to go for a type of glue that has great impact resistance. You need something that can handle a bit of movement and stay flexible. Or else, if the aquarium suffers an impact or some sort of movement, the bond may break.

Color and Yellowing Resistance

The aquarium glue that you get should always dry totally clear, or else it won’t look very nice. On that same note, it should also be UV resistant so it does not fade or change colors over time.

Safety and Toxicity

We are talking about your fish and plants here, so whatever aquarium glue you go with absolutely needs to be 100% non-toxic when cured. You don’t want to end up poisoning your aquarium inhabitants.

Ease of Application

Getting something that comes with a simple application nozzle is also recommended. This will allow for easy application. You may also want to look for a product that is thick enough to allow for vertical application.