When you buy through links on our site, we may earn an affiliate commission at no cost to you.

Top 8 Best Aquarium Silicone in 2022 Reviews

There you might be, simply minding your online business and sustaining your tank as standard when all of the sudden… Unwelcome water droplets are rolling down the corners of the tank! You see the moisture across the base and notice there’s an issue.

Do you have to purchase a brand new tank? You possibly can… Or you may get some sealant and repair it for a fraction of the price and just a bit further effort.

The perfect aquarium silicone sealants will do the job effortlessly. Right here’s how one can choose the correct aquarium-safe silicone, and some suggestions to get you began…

High 8 – Rated Aquarium Silicone Choices For The Market 2022

1 Momentive RTV108 Silicone

From Momentive, the RTV108 silicone is available in a 300ml tube. It’s appropriate to be used in a caulking gun or for handheld functions.

This can be a high-performance silicone constructed to resist temperature extremes in each instructions. It doesn’t include poisonous components or colorants. As a normal function one half silicone, the RTV108 bonds nicely to aquarium glass and even previous silicone left on the tank.

It’s clear, making it an excellent match for many aquariums aesthetically. Consistency of the silicone is just like paste, so it’s straightforward to use wherever within the tank. It’s FDA 21 compliant, USDA licensed, NSF commonplace 51, USP 23, and meets Mil-a-46106 army requirements.


For an excellent all-purpose clear silicone, this can be a good selection. You possibly can work on giant and small tanks for contemporary and saltwater aquariums. It’s easy to make use of and fully protected for marine life.

Are there any downsides? Let’s see…

  • Nice for tanks of all sizes
  • Efficient for bonding glass panes and sealing inside edges
  • Lengthy shelf life
  • Multi-purpose, helpful for different DIY initiatives in your tank
  • Barely thicker consistency than different Momentive RTV silicones
  • Producer doesn’t label it for aquarium use particularly

2 GE 1200 Collection Development Silicone

One other clear silicone, the GE 1200 collection development silicone is available in an ordinary 300ml tube match for a caulking gun. The brilliant inexperienced label is straightforward to identify, with the SCS1200 mannequin quantity clearly seen.

As a development grade silicone, you’ll discover this product to be robust sufficient for any tank. It may be used to bond glass panels collectively and in addition seal the within. You should use this for any tank constructing and DIY aquarium upkeep.

Curing could be performed by merely letting the silicone relaxation till it’s totally dried on. You’ll discover a rubbery, versatile consistency within the completed product. The pliability helps it to stay sturdy in a moist surroundings whereas additionally sealing towards leaks.

There aren’t any components or poisonous brokers on this silicone. As a excessive power silicone, it’s constructed to resist temperature extremes and high-pressure environments in giant tanks.


GE silicones like this one are a well-liked alternative for tank constructing. That is an particularly good possibility for bonding glass panels. It’s additionally efficient at creating watertight seals, so you should utilize it for the entire tank with out bother.

It could actually’t all be good, can it? Learn on to seek out out…

GE 1200 Series Construction Silicone
Our rating:4.4 out of 5 stars (4.4 / 5)

  • Efficient to be used throughout the aquarium
  • Bonds very nicely to glass
  • Tremendous sturdy bond fashioned that may maintain a tank collectively nicely
  • Nice for constructing or resealing giant tanks
  • Helpful for glass to steel functions
  • Might not bond nicely with acrylic
  • Extra effort required to use this than a thinner silicone

3 Black Aquarium Silicone Sealant

For a special look in your tank, the ASI black aquarium silicone sealant works nicely. Every tube accommodates 10.2fl.oz. or about 300mls of sealant. You can too get a clear model.

There aren’t any poisonous components on this silicone. Black coloring brokers within the sealant won’t negatively have an effect on marine life in your tank. This silicone is constructed for fixed immersion in water obligatory for an excellent aquarium silicone.

As a stiffer silicone, this may be utilized from any angle with out working or sagging. It’s going to face up to temperature extremes after it’s totally cured. Saltwater tanks, freshwater tanks, and vivariums can all be sealed utilizing this product.


With totally different coloration choices, you should utilize this to get the correct search for your tank. It’s sturdy sufficient for use in quite a lot of aquariums with out issues.

Is there a catch? We’ll see about that…

Black Aquarium Silicone Sealant
Our rating:4.3 out of 5 stars (4.3 / 5)

  • Bonds nicely to glass and acrylic
  • Shiny black look is enticing in a tank
  • Good for bigger tanks and small tanks alike
  • Sturdy maintain for glass utility
  • Units in a short time as soon as utilized
  • Full curing can take 7 to 10 days
  • Sturdy odor whereas making use of the silicone

4 Aqueon Silicone Sealant

With the Aqueon silicone sealant, you will have numerous shopping for choices. You may get it in 1oz, 3oz, and 10.3oz sizes with an non-obligatory 2-pack of 10.3oz tubes. There are additionally two totally different colours: clear or black.

This can be a sealant that’s made to be used in aquariums. It holds as much as all of the anticipated situations in each freshwater and saltwater tanks, in addition to being helpful for vivariums. As soon as sealed in place, it’s watertight and durable.

Whenever you apply this silicone, it should treatment in place with out shrinking, cracking, or contracting. It’s comprised of 100% silicone with none poisonous components.

1oz and 3oz tubes could be utilized by hand whereas the ten.3oz tube is appropriate with an ordinary caulk gun.


If you wish to make certain you’re getting the correct factor, this can be a incredible alternative. It’s meant for aquariums, so you’ll be able to have peace of thoughts that it gained’t hurt your tank in any approach.

Sounds good, proper? Let’s take a look at each side…

  • Made particularly for aquariums
  • A number of shopping for choices to swimsuit no matter you want
  • 100% protected for aquariums of all kinds
  • Bonds nicely to acrylic and glass, or a mix of each
  • Smaller tubes can get messy when in use
  • The cap on smaller tubes might break if overtightened

5 ASI Clear Aquarium Silicone Sealant

One other aquarium-specific sealant, this one from ASI is available in a ten.2fl.oz. tube. Black and clear are each accessible.

Excessive tensile power makes this sealant a good selection for aquariums of assorted sizes. ASI charges it for tanks as much as 750 gallons as a constructing and repairing sealant. You possibly can bond glass panels or create a watertight seal inside with this silicone.

Applicable for all sorts of aquariums, this is a perfect silicone for no matter form of tank you run. It’s comprised of 100% silicone with out poisonous or dangerous components to pollute the water. When cured, it stays versatile sufficient to remain in form with out shrinking or cracking.


As an aquarium-specific sealant, you gained’t have issues with this in any tanks. It has a robust maintain that’s good for small and enormous tanks alike.

Anything you need to know? There’s extra…

ASI Clear Aquarium Silicone Sealant
Our rating:4.4 out of 5 stars (4.4 / 5)

  • Units rapidly as soon as out of the tube
  • Bonds strongly to glass and acrylic tanks
  • Resists water and stays agency and watertight in aquarium situations
  • Longlasting as soon as totally cured
  • The sealant might take as much as 7 to 10 days to completely treatment
  • Consistency is sticky, could also be tougher to work with
  • You might get sturdy smells from the fumes as you apply it

6 Aquascape Black Silicone Sealant

Should you want just a few extra choices, this aquarium-specific sealant is a superb possibility. You should purchase 4.7oz or 10.1oz tubes in both black or clear.

That is 100% silicone that’s protected for marine life and acceptable for full immersion underwater. You should use it for constructing or sealing a tank, together with vivariums, saltwater tanks, freshwater tanks, and turtle tanks. The bond is watertight.

For inside waterproofing, you’ll be able to depend on this silicone holding a good bond. Silicone for aquariums can be utilized to connect items inside in addition to sealing the perimeters. Whereas curing it gained’t shrink or contract to create cracks. It’s going to match in addition to you apply it.


Should you’re on the lookout for an aquarium-specific silicone for tank constructing or repairs, this can be a nice possibility. You’ll be capable of do no matter you could and get your aquarium up and working once more rapidly, with none leaks.

Aquascape Black Silicone Sealant
Our rating:4.2 out of 5 stars (4.2 / 5)

  • Made particularly to be used in aquariums
  • Nice buying choices to fit your wants
  • Simple to use and use
  • Cures inside just a few days
  • Applies evenly and stays versatile after curing
  • Fumes launched whereas making use of the silicone are sturdy
  • Packaging for the smaller tube is just not one of the best
  • Sticky texture makes it arduous to squeeze out of the tube

7 Dap 00688 All-Objective Adhesive Sealant

For smaller aquarium jobs, the DAP 00688 all-purpose adhesive sealant is an possibility. It is available in a 2.8oz tube with a resealable cap and an applicator nozzle. This can be a clear silicone sealant.

This silicone sealant works nicely to patch up aquarium sealant or to make small repairs in a tank. In case you have a smaller aquarium, one tube might go fairly far. When totally cured, it’s watertight and 100% protected for marine life.

After you’ve utilized the sealant, it gained’t crack or shrink when it’s completed curing. Should you apply it correctly, it should stay sturdy in most tank sizes and can work in all water situations. It’s immune to saltwater and freshwater, and it really works in temperature extremes.


Should you’ve bought a smaller restore job otherwise you’re engaged on a small tank, you’ll be able to do this sealant. Due to the small package deal measurement, it’s handy to retailer and simple to use if you solely want just a little little bit of silicone.

Dap 00688 All-Purpose Adhesive Sealant
Our rating:4.1 out of 5 stars (4.1 / 5)

  • Simple to use and shut for storage
  • The adhesive is powerful sufficient to bond glass and acrylic panels
  • Stays versatile when cured
  • Cures inside 2 to three days
  • Multi-purpose and versatile in use, not only for aquariums
  • Measurement is just not handy for bigger sealing initiatives
  • Units slowly after making use of
  • Applicator nozzle tough to scrub out for re-use

8 Loctite Clear Silicone Waterproof Sealant

Much like different small tube choices on this record, the Loctite clear silicone waterproof sealant is available in a 2.7oz tube. You may get 1 or purchase the 6-pack in the event you want extra of it. It’s clear, not coloured.

This silicone repairs, seals, and builds. You should use it for something in your aquarium, together with ornamental initiatives and further installations throughout the tank. It holds up nicely to fixed immersion in contemporary or saltwater tanks.

This can be a 100% silicone product with none dangerous components or any coloring brokers. It’s fully protected to be used in an aquarium, as soon as it has cured totally.


Loctite has an excellent status for aquarium-safe sealant. This small tube delivers a robust maintain for any aquarium initiatives.

Good? Sure. However is there one thing else you need to know? Learn on…

Loctite Clear Silicone Waterproof Sealant
Our rating:3.9 out of 5 stars (3.9 / 5)

  • Aquarium protected
  • Bonds on quite a lot of supplies, together with glass and acrylic
  • Nice to be used as a watertight sealant and a water-resistant glue in your tank
  • Units and cures rapidly
  • Sturdy and stays versatile in water
  • Packages are small, could also be tough to make use of for bigger initiatives
  • Applicator tip could also be tough to re-use
  • Packing is just not sturdy and will burst if squeezed too arduous

Which Silicones Are Protected For Aquarium Use?

Silicone is just not all created equal. For one of the best aquarium silicone, deal with these traits:

  • 100% Silicone

The primary signal you need to search for is assurance that what you’re shopping for is 100% silicone. Some other components could make it ineffective and unsafe to be used in an aquarium. Should you’re going to make use of silicone in any sort of aquatic tank, it needs to be 100% silicone.

  • Added Properties (Anti-Fungal, and so on.)

Silicone for fish tanks, reef tanks, and different aquariums should not have any components. When used within the house, many silicone merchandise have anti-fungal or mildewcide additives. Whereas helpful for house functions, these can leach chemical compounds into your aquarium water, particularly ammonia.

Best Aquarium Silicone -in 2022 Reviews

  • Colorants

Silicone sealants with coloration components might not treatment the identical approach that clear silicone does. Some colorants can flake off or dissolve into the water. If you’d like a coloration, ensure you get an aquarium protected coloured silicone.

  • Curing

The curing course of is what transforms gelatinous silicone right into a hardened sealant. Most silicones treatment totally inside just a few days. Verify the curing time and take that into consideration if you’re sealing your tank. Additionally, it’s a good suggestion to verify with curing will leach out any chemical compounds.

  • Tensile Power

Tensile power is the quantity of pressure a particular silicone can deal with. Most aquariums don’t want a excessive tensile power, however it’s higher to play it on the protected aspect in the event you’re unsure. Excessive tensile power means the tank can maintain up higher beneath increased strain.

For instance, bigger tanks want a better tensile power than smaller tanks. Because the tank measurement will increase, you desire a stronger silicone to keep away from leaks afterward.

How To Take away Aquarium Silicone From Glass

Earlier than you’ll be able to reseal your tank, it’s important to take away the previous silicone from the within. It’s necessary that you simply make a distinction right here: silicone on the inside of the tank is just not the identical because the silicone bonding two panes of glass collectively. Let me clarify…

There are two alternative ways silicone is utilized in an aquarium. Silicone bonds panes of glass collectively to type the form of the aquarium. A separate layer of silicone can also be utilized across the inside corners of the tank to cease leaks.

Best Aquarium Silicone in 2022

This course of is for removing the inside corner silicone, however the primary ideas will also be used for bonding silicone. All you want is a razor blade or comparable software and a few type of acetone.

First, drain the tank of water, fish, and different components. Then, slide the razor blade beneath the silicone from each side till it peels away, being cautious to not lower between glass panes. Lastly, take your acetone and use it to wipe away any remaining residue left by the silicone.

Acetone could be something from Windex to white vinegar. Be sure that no matter you utilize gained’t go away any dangerous residue behind. Whenever you’re performed eradicating the silicone, vacuum out all of the particles and prepare to reseal it.

How To Use Aquarium Silicone Sealant

At this level, the previous silicone out of your tank is gone. You’ve wiped away the remaining residue. There’s a clear slate prepared so that you can apply new silicone. Right here’s the way you do it…

For this half you want painter’s tape, aquarium protected silicone, and persistence. Apply painter’s tape across the corners the place you’re going to put the silicone. Depart a couple of quarter inch of house within the corners to permit the silicone to bond to the glass. The tape helps hold your workspace cleaner, although it’s not strictly obligatory.

Best Aquarium Silicone

As soon as your tape is down, take your silicone and apply a fair bead across the edges of the tank. Subsequent, use your finger to press it into the perimeters towards the glass and clean it out. Whereas the silicone continues to be moist, take away the tape from the tank.

At this level, your solely step left is to attend for the silicone to treatment. Learn the directions and details about the silicone you used to know the way lengthy you need to wait. Some might treatment in 24 hours whereas others take 3 days.

After it cures, you’ll be able to fill the tank up and take a look at for leaks. It’s a good suggestion to go away it sitting exterior filled with water for just a few days to check it totally. If it doesn’t leak in that point, you’re able to arrange your tank once more.

Prepared… Set… Seal!

Don’t fear, it truly is as straightforward because it appears. Even in the event you’ve by no means performed it earlier than, you’ll be able to reseal and restore your tank sealant and keep away from shopping for a completely new tank. All you want is one of the best aquarium silicone you will get and just a little further time to do the work.

Search for the ASI black aquarium silicone sealant in the event you’ve bought a full tank to seal or the Loctite clear silicone waterproof sealant in the event you’ve simply bought just a little work to do.

No matter silicone you select, verify that it’s aquarium protected! The well being and security of your fish is the highest precedence if you’re sorting by means of the top-rated aquarium silicones.

2 thoughts on “Top 8 Best Aquarium Silicone in 2022 Reviews”

  1. Our 100-percent silicone aquarium sealant is easy to apply and waterproof to stop leaks. The high strength silicone creates a permanent seal that will not crack Or shrink and is non-toxic making it perfect for use on all aquariums. For standard aquariums use clear and Black Seal aquariums use Black sealant.

Leave a Comment