Maya Ellison
Waterslide decals are a popular choice for customising plastic surfaces with intricate designs and logos. While they offer a high-quality finish, sealing them correctly is key to ensuring their longevity and durability. The sealing process involves applying a clear coat over the decal after it has been applied to the surface. This process protects the decal from physical damage, UV light, and moisture. It is important to note that not all waterslide decal papers need sealing; however, inkjet printed decals require sealing with a clear, acrylic-based sealant or varnish to prevent the ink from running off when submerged in water. The sealant should be sprayed or brushed on in several thin coats, allowing adequate drying time between coats to prevent smudging or dissolving the decal.
| Characteristics | Values |
|---|---|
| Type of sealant | Clear, water-based acrylic sealer or clear varnish |
| Application | Spray or brush on a light coat |
| Number of coats | 3 |
| Distance from decal paper | 30 cm |
| Dry time between coats | 3 minutes |
| Cure time | 24 hours or more |
| Sealant brands | Rust-Oleum 2X Clear, Rust-Oleum Crystal Clear Enamel, Rustoleum 2X Clear Gloss, Krylon Triple Thick Crystal Clear, Flex Seal Clear, Plaid Mod Podge Acrylic sealer |
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What You'll Learn
Choosing the right sealant
Type of Decal Paper
Not all decal papers require sealing. Some types, such as laser-printed decal papers, can be applied directly without needing to go through the sealing process. Inkjet waterslide decal papers, on the other hand, typically require sealing. Make sure to check the specifications of your decal paper to determine if sealing is necessary.
Compatibility with the Surface Material
It is important to choose a sealant that is compatible with the surface you are applying the decal to. For instance, if you are applying the decal to plastic, select a sealant suitable for plastic surfaces. Other common surfaces include wood, metal, glass, and ceramics.
Sealant Formulation
Clear, water-based acrylic sealants or clear varnishes are generally recommended for sealing waterslide decals. These sealants can be applied by spraying or brushing. Spray sealants are preferred by some as they can be easier to apply evenly. However, if you choose to spray, ensure you are in a well-ventilated area or wear a mask to protect yourself from inhaling the sealant.
Cure Time
Different sealants will have varying cure times, which is the time required for the sealant to fully dry and set. Some sealants may take as little as 5 minutes, while others may need 24 hours or more. It is crucial to follow the manufacturer's instructions for cure time to ensure the sealant is effective and does not cause issues like cracking or sliminess.
Water Resistance
If the item you are applying the decal to will come into contact with water, it is essential to choose a sealant with water-resistant or waterproof properties. Not all clear sealants are created equal in this regard, so be sure to check the manufacturer's specifications.
Finish
The finish of the sealant can also be a factor in your decision. Some sealants may leave a glossy finish, while others may result in a more matte or eggshell texture. Consider the desired aesthetic of your project and choose a sealant that aligns with that look.
In summary, when choosing the right sealant for your waterslide decal on plastic, opt for a clear, water-based acrylic sealant or varnish that is specifically recommended for use on plastic surfaces. Follow the manufacturer's instructions for application and cure time, and consider the finish you wish to achieve for the final product.
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Preparing the decal for sealing
Before sealing a waterslide decal on plastic, there are a few important preparation steps to follow. Firstly, ensure that you are using the correct type of decal paper. While some decal paper, such as Laserjet Waterslide Decal Paper, does not require sealing, Inkjet Waterslide Decal Paper does. Therefore, it is crucial to verify that you are using the appropriate paper for sealing.
Once you have confirmed that your decal paper requires sealing, the next step is to print your desired image onto the decal paper. Set your printer to print on high-quality "glossy photo paper" and ensure that you are printing on the glossy side of the paper. After printing, allow the image to dry thoroughly. This step is crucial, as rushing it can impact the quality of your project. Give it at least three minutes to dry completely.
Now, it's time to apply your decal to the plastic surface. Smooth surfaces, such as plastic, are ideal for waterslide decals. Ensure that the plastic surface is clean and free of any debris or imperfections. Carefully follow the instructions for applying the decal, as this can vary depending on the specific decal paper you are using.
After successfully applying the decal to the plastic surface, it is essential to let it dry completely and ensure that it is firmly adhered to the plastic. This step is crucial because applying the sealant too soon can cause issues with the adhesion of the decal. Once the decal is completely dry and securely attached, you can proceed to the sealing process.
It is important to note that you should not cut out your decal before sealing. Cutting the decal before spraying can cause the decal to glue to the backing, and the paper backing may not release when submerged in water. Keep the entire sheet intact and place it on a protected surface, with the printed side facing up. Be mindful of wind if spraying outdoors, and always spray in a well-ventilated area while wearing a mask to protect your respiratory system from inhaling the sealant.
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Applying the sealant
Firstly, ensure that your decal is completely dry and firmly adhered to the plastic surface. Place the decal on a flat, protected surface such as newsprint or cardboard, with the printed side facing up. Hold the spray can about one foot or 30 cm from the decal paper and start by spraying a light, even coat of clear spray paint or sealant over the printed image. It is important to spray outside or in a well-ventilated area while wearing a mask to protect yourself from inhaling the sealant.
After spraying the first coat, allow adequate drying time before applying additional coats. Each layer should be thin to prevent the decal from wrinkling or distorting. Three coats of sealant are generally recommended, with a three-minute dry time between each coat. However, you may need to adjust the drying time depending on the manufacturer's instructions and environmental conditions.
Once you have applied all the coats, allow the decal to cure. The cure time can vary depending on the manufacturer's recommendations and environmental factors such as temperature. A longer cure time of 24 hours or more is generally recommended to ensure the decal is fully sealed and durable.
It is important to note that not all clear sealant sprays perform equally well on waterslide paper. Choose a sealant that is compatible with the surface material and always test on a small area first if you are unsure. Additionally, avoid spraying the sealant too heavily, as it may cause running or cracking of the ink.
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Drying and curing the decal
Drying the Decal:
- After printing your image onto the waterslide decal paper, allow it to dry completely. This step is essential, so give it at least three minutes to dry. Do not rush or skip this step, as it will impact the adhesion of the decal.
- If you're using a laser printer, you can skip the drying step and proceed to cut and apply your decal.
Curing the Decal:
- Once the decal is applied to the plastic surface, ensure it is completely dry and firmly adhered.
- Choose a suitable sealant for the plastic surface. It is recommended to use a clear, water-based acrylic sealer or a clear varnish compatible with the decal and plastic material.
- Apply the sealant in several thin coats, spraying or brushing it on. Hold the spray can about one foot or 30 cm away from the decal, and be careful not to spray too heavily to avoid running or cracking.
- Allow adequate drying time between coats to prevent smudging or dissolving the decal. Each manufacturer will specify the cure time for their product, but it is generally recommended to leave the decal to cure for at least 24 hours in a well-ventilated area.
- After curing, your decal will be protected from physical damage, UV light, and moisture.
Remember that the curing process is critical to the success of your project. Always follow the manufacturer's instructions for cure times and safety precautions when working with sealants.
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Aftercare and maintenance
The aftercare and maintenance of your sealed waterslide decal on plastic are important to ensure its longevity and durability. Here are some detailed instructions to help you care for your project:
- Protect from Physical Damage: Waterslide decals are fragile and can be prone to discolouration, cracking, or lifting off the surface when exposed to humidity or water. Keep your project away from moisture and humidity sources to prevent damage.
- UV Light Protection: Ensure your project is not exposed to direct sunlight or UV light for extended periods. The UV rays can cause the colours to fade or discolour over time.
- Handle with Care: Waterslide decals are susceptible to wear and tear and physical damage. Avoid frequent handling, and always handle your project with clean hands and care to prevent accidental damage to the decal.
- Cleaning: When cleaning your project, use a soft, damp cloth to gently wipe away any dust or dirt. Avoid using harsh chemicals or abrasive cleaning agents, as they may damage the decal.
- Recoating: Over time, the clear coat over your decal may start to wear off. If you notice any areas where the clear coat is thinning or missing, reapply a thin layer of the clear acrylic sealer or varnish to protect the decal. Ensure to follow the same process of thin coats and adequate drying time as mentioned earlier.
- Storage: If you need to store your project, ensure it is stored in a cool, dry place away from direct sunlight. Consider wrapping it in a soft cloth or tissue paper to prevent accidental scratches or damage during storage.
Remember, the lifespan of your waterslide decal will depend on factors such as the quality of the decal, the surface it is applied to, and the environmental conditions it is exposed to. With proper aftercare and maintenance, your sealed waterslide decal on plastic can last for several years.
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Frequently asked questions
Any clear acrylic-based sealant or clearcoat will work on waterslide paper if applied correctly. It is recommended to use spray-based sealants instead of painting or rolling sealants over the paper.
You will need to apply at least three coats of clear spray paint or sealant. Applying the sealant too heavily may cause running ink and/or sealant.
Waterslide decals are very fragile, and without sealing, they will discolour, crack, or lift off the surface when exposed to humidity/water.
