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You don't.
Polyurethane is a carbamate-based polymer. Water has essentially nothing to do with it. You make it by reacting compounds with isocyanate groups with compounds with alcohol groups. Including water can mess up the reaction, since water reacts with isocyanates. Sometimes this is desirable in small quantities to produce a polyurethane foam... the carbon dioxide serves as an in situ blowing agent. Freon-like materials are also sometimes used for this purpose, since it has the advantage of not using up some of the isocyanate starting material.
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Is polyurethane renewable?
Polyurethane can be recycled.
How do you clean a table that has a polyurethane finish?
You can use a vinegar and water mixture. Or mineral spirits.
What are the properties of polyurethane?
The properties of polyurethane are resistance to explosive decompression and interaction with light. Polyurethane is also durable and makes a good insulator.
Does Japan dryer work with polyurethane?
No. Japan Dryer was designed to accelerate the drying rate of oil based products, not synthetic based products. Read the instructions and use the recommended amount.
What is two-component polyurethane?
All polyurethane contains two chemicals: a diol and a diisocyanate. (There's also a catalyst called DABCO and a few other items in there to modify the finished polymer, but for now let's stick with the two important ones.) A two-component polyurethane brings you the diol and the diisocyanate as two separate packages. There are a couple of two-component systems available to someone who doesn't own a plastics plant: car paint, where you put hardener in the paint to make it dry, and sprayed foam insulation. The way most of us get our polyurethane is as single-component systems, because diisocyanate is very poisonous. Polyurethane varnish, Gorilla Glue, and polyurethane construction adhesive all work the same way: the diisocyanate is missing parts. If you add water to it--whether through the air or by moistening the surface--the diisocyanate picks up what it needs and the urethane reaction commences.
Can you apply polyurethane over enamel paint?
You can apply "oil" based polyurethane over "oil" based enamel, you can also apply "water" based polyurethane over "water" based enamel, never mix the two, there's to much of a chance for problems.
Can polyurethane be sprayed over an item painted with acrylic paint?
Yes, both oil and water-based polyurethanes will adhere well to an item coated with acrylic paint. If it is a polyurethane paint, dull the surface prior to painting. If it is a clear. realize that that oil based polyurethane will impart an amber hue while a water based polyurethane is crystal clear and will not affect the color.
What is the paint used for a wooden bangle?
It isn't so much the type of paint, its the finish on the paint, you want a tough durable finish for a Bangle. TIP: if you use a oil based enamel, use a oil based polyurethane finish, if you use a water based enamel, use a water based polyurethane, Make it a rule of thumb and you will never have bubbling or peeling problems.
Can polyurethane finished table be sanded lightly and refinished with a water based polyurethane product?
Yes, it can. I would sand it with a 220 or even 360 grit.
Which is better polyurethane or urethane for wood floors?
Polyurethane will give a long lasting easy to apply finish. Use a water based polyurethane ans clean up will be much easier. You should get years of wear from a good polyurethane finish.
Why after spraying water based coating's there's bubbles coming out?
After you spray something with a water based coating you should spray over it with polyurethane. This will make the bubbles not come up and the surface you have just sprayed stay smooth.
Can you put oil based polyurethane over latex paint on wood book shelves to prevent marring?
I make it a habit never to mix water-based with oil-based, way to many problems occure. On the up note they have water-based poly, use that. Good-Luck
How do you clean Polyurethane out of a paintbrush?
Usually with paint thinner or mineral spirits, (for oil-based) for water-based, soap an water, look on the container for clean up instructions.
How Come 100 solids of Polyurethane based Adhesive available in Liquid Form while 100 solids of polyurethane should be available in resin form?
water is a solid and it can be poured because the particles inside the water are movable
Which is more durable oil or Polyurethane wood flooring?
Polyurethane comes in two forms, oil-based or water-based. Both are quite durable. Oil-based poly is slightly amber or golden-colored, so it will give a golden glow to your wood. Water-based poly dries crystal-clear so it won't change the color of your floors at all. There are some oil-modified versions of polyurethane on the market now, available to consumers, which are still soap-and-water clean-up like water-based polys. These oil-modified polys tend to be more durable than ordinary polyurethane. To minimize the appearance of scratches and wear later, choose a satin-finish instead of gloss.
Can polyurethane go over oil base paint?
Yes, as long as the polyurethane is oil-based.
What type of thinner is used for oil varnish?
Oil-based poly varnish is thinned with mineral spirits. Water-based poly varnish is thinned with water. And polyurethane car paint is thinned with reducer.
