
Krylon Fusion All-in-One spray paint is a popular product among aquarium owners for its ability to stick to plastic surfaces. While some users have reported success in using the paint above and below the waterline, others have expressed concerns about its potential impact on aquatic life. Krylon, as a company, does not recommend their products for use below the waterline, stating that they are not immersion-rated or waterproof and may harm aquarium life. However, with proper curing time and light coats, some users have found it effective for their aquariums. With a variety of colours available, Krylon offers an appealing option for those looking to enhance their fish tanks.
| Characteristics | Values |
|---|---|
| Safe for aquarium use | Some users claim it is safe, but Krylon's official response is that their products are not recommended for use below the waterline or for immersion |
| Variety of colours | 19 different colours |
| Curing time | At least 24 hours after the final coat, preferably 48 hours |
| Surface preparation | Lightly sand the surface with extra-fine grain sandpaper and clean off any residue |
| Number of coats | 4 very light coats |
| Chipping | Cures hard and will chip during normal wear and tear |
| Comparison to other brands | More colour options than Rust-Oleum and Valspar, but Rust-Oleum and Valspar have more unique colour choices |
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What You'll Learn

Krylon Fusion's safety for aquarium use is disputed
Krylon Fusion's safety for use in aquariums is disputed. While some people claim to have used the product with no issues, Krylon itself does not recommend using any of its products below the waterline. The company states that none of its products are immersion-rated or waterproof, and they may harm aquarium life.
Krylon Fusion is a spray paint designed to bond with plastic. It is advertised as suitable for plastics and is often recommended for use in aquariums due to its ability to etch into plastic. However, Krylon does not claim that its products are safe for use in aquariums. The company warns that its products are not immersion-rated or waterproof and may only last temporarily underwater. Additionally, Krylon's products are not FDA-approved, which is important to consider regarding ingestion by aquatic life.
Despite Krylon's warnings, some people have used Krylon Fusion in their aquariums with reported success. Some recommend waiting for the paint to cure completely before submerging it, usually for at least 24 hours, but preferably 48 hours. Others suggest sanding the surface to be painted to improve the paint's adhesion and allowing it to dry for several weeks before submerging it. However, it is important to note that even with these precautions, the paint may still chip over time due to normal wear and tear in the tank.
The discrepancy in opinions regarding the safety of Krylon Fusion for aquarium use may stem from the company's liability concerns. Krylon may refrain from endorsing its products for aquarium use to avoid potential lawsuits if issues arise. Additionally, the product's popularity and affordability may contribute to its widespread use in aquariums, despite the lack of official approval from the company.
It is essential to thoroughly research and exercise caution when choosing products for use in aquariums to ensure the safety and well-being of aquatic life. While some people have reported success with Krylon Fusion, it is always advisable to prioritize the health of your aquarium inhabitants and consult expert opinions or alternative products specifically designed for aquarium use.
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Krylon's response to queries about Fusion's safety
Krylon Fusion spray paint is a popular product among aquarium enthusiasts. Many people have used it to paint items in their aquariums with varying degrees of success. Some users have reported that it works well above and below the waterline, while others have expressed concerns about its safety.
Krylon, the manufacturer of Fusion spray paint, has provided a response to queries about the product's safety for aquarium use. In an email response to a customer, Krylon stated that they do not recommend using any of their products below the waterline. They also mentioned that their products are not immersion-rated or waterproof, and while they may last for some time underwater, there is no guarantee of how long they will hold up. Additionally, Krylon products are not FDA-approved, and they warn that their products may harm aquarium life.
Krylon's response highlights important considerations for aquarium enthusiasts. The fact that their products are not immersion-rated or waterproof means that there is a risk of the paint failing when submerged in water. The lack of FDA approval and the warning about potential harm to aquarium life are also significant concerns.
However, some users have shared their experiences using Krylon Fusion in their aquariums. One person shared that they painted a PVC pipe with Fusion and used it below the waterline in their sump. They let it cure for several weeks before submerging it, and they had no issues. Another user mentioned that they used Fusion on a DIY light stand that gets splashed occasionally, and it has held up well after a year.
It is important to note that while some people have had success with Krylon Fusion in their aquariums, there are alternative products specifically designed for aquarium use, such as Plasti-Dip, which is considered harmless when completely dry. As always, it is crucial to prioritise the safety and well-being of the aquatic life in your aquarium when making any modifications or additions.
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Krylon Fusion's application process
Krylon Fusion All-In-One is a spray paint product that is designed to bond with difficult surfaces such as plastics without sanding or priming. It provides maximum rust protection and offers a broad colour palette with multiple finishes and sheens. The product is safe to use for both indoor and outdoor projects.
The application process for Krylon Fusion is as follows:
- Set up your workspace: It is recommended to work outdoors or in a well-ventilated area. Make sure your space is separate from surfaces that you do not want to get paint on, and always work on an absorbent material such as cardboard or a drop cloth. You can also create a single-use spray booth with a cardboard box for added protection.
- Wear protective gear: It is important to always wear a painting mask when working with spray paint.
- Prepare the surface: Clean the surface to be painted with a cleaner like TSP to remove any dirt, chalking, or grease. If painting smooth plastic, it is recommended to lightly sand the surface with extra-fine-grain sandpaper and clean off any residue.
- Apply the paint: Hold the spray can the recommended distance away from the surface to minimize drips and areas of excess paint. This distance will be outlined on the can. Apply several light coats, waiting 30-60 seconds between each coat until you are satisfied with the appearance. Always start and finish your spray pattern off the object and release the spray tip at the end of each pass to ensure even coverage.
- Allow the paint to dry: Krylon Fusion All-In-One is dry to the touch in 20 minutes and can be handled in about one hour.
- Cure time: If using the painted item in an aquarium, allow at least 24 hours for the paint to cure completely before immersing it in water.
It is important to note that Krylon Fusion may chip during normal wear and tear, especially when used in an aquarium. To help reduce chipping, it is recommended to lightly sand the surface before painting and to apply multiple light coats.
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Alternative paints for aquarium use
While Krylon Fusion All-in-One spray paint is often used for aquarium decorations, many people wonder if it is safe for their fish. It is always a good idea to research products before using them in your aquarium, as many paints absorb water and begin to bubble, peel, and break off in tiny flakes, which can be harmful to fish.
There are several alternative paints available that are safe for aquarium use. Firstly, epoxy paint is not only safe for your fish, but it can also be beneficial to their health. The epoxy resin keeps potential pathogens away, improving the water quality and creating a safer environment for your fish. Epoxy is also beneficial due to its high UV resistance, which is important if your aquarium is in a well-lit place. Another advantage of epoxy paint is that it prevents moss growth and makes cleaning your aquarium easier.
Latex paint is another alternative, as it is water-based and suitable for aquarium use, provided it does not contain harmful chemicals. Latex paint is a good option because it usually covers the surface in fewer coats, dries quickly, and is easy to clean. Additionally, it resists chalking and is resistant to mildew and mold, making it a durable paint for aquariums.
Acrylic paint is another option, but it is not widely used for aquariums as it can start to crack or flake off over time. If you choose to use acrylic paint, you can prevent cracking by coating it with a non-toxic sealant.
Other spray paints that are advertised as suitable for plastics are also safe to use in aquariums. Brands such as Valspar, Rust-Oleum, and Plasti Dip offer a variety of colours and are safe for aquarium use. However, Plasti Dip becomes rubber after curing and is designed to peel off when scratched, so it may not be suitable for all projects.
It is important to remember that all painting products will be toxic before they are fully cured, so they should be handled with caution during and after application.
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Krylon Fusion's safety above the waterline
Krylon Fusion spray paint is considered safe by many for use above the waterline in aquariums. It is available in 19 different colours, which means you will be able to find what you are looking for unless you are looking for something very specific.
Krylon Fusion is designed to etch onto plastic, and it does so very efficiently. It is also affordable and easy to apply. However, it is not FDA-approved, so it is not recommended for use below the waterline. Krylon themselves have stated that none of their products are immersion-rated or waterproof, and they may harm aquarium life.
If you are going to use Krylon Fusion above the waterline, it is recommended that you let it cure for at least 24 hours before immersing it in water, although 48 hours is preferable. If you are painting smooth plastic, it is best to lightly sand the surface with extra-fine-grain sandpaper first and then clean off any residue. You should then apply at least four very light coats of paint. Because Fusion cures hard, it will chip during normal wear and tear in the tank.
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Frequently asked questions
Krylon Fusion All-in-One paint is not recommended for use in aquariums by the manufacturer. In an email response to a customer, Krylon stated that none of their products are immersion-rated or waterproof, and that their products may harm aquarium life. However, some people have used Krylon Fusion in their aquariums with no issues reported. It is important to note that all painting products are toxic before they are fully cured, so it is recommended to wait at least 24 hours, and preferably 48 hours, after the final coat before immersing any painted objects in water.
Some alternative paints that are advertised as safe for use on plastics and in aquariums include Rust-Oleum, Valspar, and Plasti Dip. It is important to research and follow the instructions for any paint being considered for use in an aquarium to ensure the safety of the fish and other aquatic life.
If you choose to use Krylon Fusion All-in-One paint for your aquarium, there are a few considerations to keep in mind. First, make sure the surface you are painting is clean and lightly sanded with extra-fine grain sandpaper to improve paint adhesion. Apply at least four very light coats of paint and allow the paint to cure completely before immersing it in water. Be aware that the paint may chip during normal wear and tear in the tank.











































