Epoxy over sublimation has become one of the most searched topics among crafters and tumbler enthusiasts. While sublimation alone delivers vibrant, permanent designs, applying epoxy on top can take those creations to the next level. Epoxy adds a glossy, glass-like finish, protects against scratches and fading, and makes custom tumblers look more professional.
But the question remains—can you really put epoxy over sublimation safely and effectively? The answer is yes, as long as you use the right materials, follow proper application steps, and take safety precautions.
In this comprehensive guide, we’ll explore what epoxy and sublimation are, why combining them works so well, a step-by-step method to apply epoxy over sublimated tumblers, alternative sealing options, and essential care tips. By the end, you’ll know exactly how to achieve flawless, durable results for your sublimation projects.
Key Takeaways
- Yes, you can apply epoxy over sublimated tumblers, but proper preparation and technique are essential.
- Epoxy provides a glossy, protective finish that resists scratches, fading, and moisture.
- Not all epoxy resins are food-safe always choose non-toxic, high-quality options designed for drinkware.
- Alternatives such as shrink wrap sleeves, sublimation film, and water-based sealers exist for those who prefer not to use epoxy.
- Correct curing, care, and maintenance are crucial for long-lasting results.
Understanding Epoxy and Sublimation
Epoxy Resin
Epoxy resin is a liquid polymer that, when mixed with a hardener, undergoes a chemical reaction that cures into a hard, glass-like surface. Known for its durability, clarity, and shine, epoxy is widely used in crafting, woodworking, and tumbler customization. It is scratch-resistant, waterproof, and adds a professional-quality finish to projects.
Sublimation Printing
Sublimation is a printing process where heat turns ink into gas, which permanently bonds to polyester-coated surfaces. Unlike vinyl or stickers that sit on top, sublimation becomes part of the surface itself. This means designs won’t peel or fade easily and remain vibrant for years.
Why Combine Them?
While sublimation provides long-lasting designs, applying epoxy adds:
- Extra protection against UV rays, scratches, and daily use.
- Enhanced aesthetics with a high-gloss finish.
- Waterproofing that prevents fading or discoloration when exposed to moisture.
This combination results in tumblers that are both beautiful and durable, making them ideal for personalized gifts or custom product sales.
Applying Epoxy Over Sublimation: Is It Possible
Yes, it is absolutely possible, and even recommended, to apply epoxy over sublimation. However, the results depend on choosing the right epoxy and following best practices.
Benefits of Epoxy on Sublimated Tumblers
- Long-lasting shine that enhances the sublimated design.
- Protection from scratches, chips, and abrasions.
- Resistance to moisture and stains.
- A professional, polished appearance.
Important Considerations
- Food Safety: Not every epoxy resin is food-safe. Look for FDA-compliant, non-toxic epoxy specifically designed for drinkware.
- Ventilation and Safety: Work in a well-ventilated area. Wear gloves, protective eyewear, and a mask.
- Curing Conditions: Epoxy requires stable temperatures (ideally 70–75°F) and dust-free environments for best results.
- Mixing Ratios: Incorrect resin-to-hardener ratios can leave epoxy sticky or soft.
So yes, it’s possible, but only with the right epoxy and careful preparation.
Step-by-Step Guide: How to Apply Epoxy Over Sublimated Tumblers
Follow these steps for a smooth, bubble-free finish:
Step 1: Prepare the Tumbler
- Ensure your sublimated tumbler is fully cooled and dry.
- Clean the surface with rubbing alcohol to remove oils, dust, or residue.
- Lightly sand with fine-grit sandpaper for better epoxy adhesion.
- Use painter’s tape to protect the rim and base.
Step 2: Mix the Epoxy
- Measure resin and hardener in equal parts (1:1 ratio, unless specified otherwise).
- Mix slowly in a clean container to reduce air bubbles.
- Scrape the sides and bottom of the container to ensure full blending.
Step 3: Apply the Epoxy
- Place the tumbler on a cup turner for even coating.
- Pour a small amount of epoxy and spread it evenly with a silicone brush or gloved hand.
- Rotate continuously to prevent drips or uneven spots.
- If desired, add glitter, pigments, or other effects before the epoxy cures.
Step 4: Cure the Tumbler
- Allow the tumbler to spin while curing.
- Keep the curing environment clean, dust-free, and stable in temperature.
- Most epoxies require 12–24 hours to fully cure, though some fast-set formulas cure faster.
Step 5: Inspect and Re-Coat if Necessary
- Once cured, check for imperfections.
- If sticky or uneven, lightly sand and apply another thin coat of epoxy.
- Repeat until the desired finish is achieved.
Alternative Methods for Sealing Sublimated Tumblers
If you prefer not to use epoxy, several alternatives can protect sublimated tumblers:
- Shrink Wrap Sleeves
- Heat-shrink plastic sleeves that tightly seal around the tumbler.
- Easy to use, though they lack epoxy’s glass-like shine.
- Heat-Resistant Sublimation Film
- Available in glossy or matte finishes.
- Provides a protective layer without the thickness of epoxy.
- Water-Based Sealers (e.g., CrystaLac or Mod Podge)
- Safer, non-toxic alternatives.
- Require multiple coats for durability but create a lighter protective layer.
- Clear Acrylic Spray Sealant
- Quick and easy to apply.
- Works best for decorative tumblers not used daily.
Tips for Caring for Your Epoxy-Coated Sublimated Tumblers
To maximize longevity, follow these care guidelines:
- Hand Wash Only: Dishwashers can damage epoxy due to heat and strong detergents.
- Use Mild Soaps: Harsh chemicals may dull the finish.
- Avoid Prolonged Sun Exposure: UV rays can cause yellowing over time.
- Do Not Microwave: Epoxy is not microwave-safe.
- Store Carefully: Keep tumblers upright and avoid stacking to prevent scratches.
Conclusion
Yes, you can put epoxy over sublimation, and when done correctly, the results are stunning. Epoxy not only protects sublimated designs but also enhances their beauty with a glossy, professional finish. From preparation to curing, every step matters to ensure a flawless coat.
For crafters and small business owners, epoxy-coated sublimated tumblers are a customer favorite, offering durability and style in one package. And if epoxy isn’t your choice, there are plenty of safe alternatives to explore. With proper care, your customized tumblers will remain vibrant, shiny, and unique for years to come.