Can I Put Oil-Based Polyurethane Over Water-Based Polyurethane?
I was working on a project a few months back, refinishing an old table. I had sanded it down, stained it a beautiful dark walnut color, and was ready to apply the polyurethane. I reached for the can of oil-based polyurethane that I had used on many other projects, but then I realized I had also bought a can of water-based polyurethane. Which one should I use?
I did some research and found that there are a few things to consider when deciding whether to put oil-based polyurethane over water-based polyurethane.
Compatibility
The most important thing to consider is compatibility. Oil-based and water-based polyurethanes are not compatible with each other. If you apply oil-based polyurethane over water-based polyurethane, the oil-based polyurethane will not adhere properly and will eventually peel off.
Drying time
Another thing to consider is drying time. Oil-based polyurethanes take longer to dry than water-based polyurethanes. If you apply oil-based polyurethane over water-based polyurethane, you will need to wait longer for the finish to dry completely.
Appearance
The final thing to consider is appearance. Oil-based polyurethanes have a more amber color than water-based polyurethanes. If you apply oil-based polyurethane over water-based polyurethane, the finish will have a darker, more amber color.
Based on these factors, I decided to use the water-based polyurethane on the table. I wanted to make sure that the finish would adhere properly and dry quickly. I also wanted the finish to have a lighter color.
Tips and Expert Advice
If you are unsure whether you can put oil-based polyurethane over water-based polyurethane, it is always best to test it on a small area first. Apply a thin coat of oil-based polyurethane over a small area of water-based polyurethane and let it dry completely. If the oil-based polyurethane does not adhere properly or peels off, then you should not use it over the water-based polyurethane.
If you are working on a large project, it is best to use the same type of polyurethane throughout the entire project. This will help to ensure that the finish is consistent and durable.
FAQs
Q: Can I put water-based polyurethane over oil-based polyurethane?
A: No, you cannot put water-based polyurethane over oil-based polyurethane. The water-based polyurethane will not adhere properly to the oil-based polyurethane and will eventually peel off.
Q: What is the difference between oil-based and water-based polyurethane?
A: Oil-based polyurethanes are made with oils, such as linseed oil or tung oil. Water-based polyurethanes are made with water and acrylic resins. Oil-based polyurethanes have a longer drying time and a more amber color than water-based polyurethanes.
Q: Which type of polyurethane is better?
A: There is no one definitive answer to this question. Oil-based polyurethanes are more durable and have a more traditional look, while water-based polyurethanes are easier to apply and dry more quickly. The best type of polyurethane for your project will depend on your specific needs and preferences.
Conclusion
I hope this article has helped you understand the difference between oil-based and water-based polyurethane and whether you can put oil-based polyurethane over water-based polyurethane. If you have any other questions, please feel free to leave a comment below.
Are you interested in learning more about polyurethane? If so, please check out my other articles on the subject.
