Polyurethane systems either cure through the reaction between organic isocyanates and hydroxyl containing compounds or contain urethane linkages in the molecular structure and dry by one of the other mentioned mechanisms. Urethane oil and alkyds are basically similar to ordinary oils and alkyds, except that the incorporation of urethane linkages into the molecules causes much larger molecules to be prepared.

Polyurethane is a term used to describe a wide ranging family of elastomers (any compound exhibiting the characteristics of natural rubber; stretchy and elastic.). Poly meaning "many" and "urethane" the classification of the chemical structure. Polyurethane or urethane for short, is used as a solid cast material (bushings). Polyurethane can be as soft as a rubber band or as hard as plastic. See similar questions...

Nitro is often called a "thin skin" as it really allows the guitar to resonate freely. It has a superior feel and a super glossy look to it. Poly is almost like a thin layer of plastic. It feels tacky and doesn't allow the guitar to resonate very well. Most companies use poly because its faster to work with. See similar questions...

Polyurethane foam includes two types, flexible and rigid. The flexible foams that we use are open cell foams, used for packaging and available in a wide range of densities and colors. It has the ability to absorb shock from an impact and recover it's original shape quickly. It's physical performance characteristics make it ideal for protecting fragile items. See similar questions...

If thinning is needed, use the thinner recommended on the label. If strong solvent is added, uneven gloss, wrinkling, and dissolving of previous coatings are only a few of many problems that can be caused. All thinner must evaporate from a coating before a film can begin to cure. Solvent is normally added to change consistency for different application methods. See similar questions...

Spray polyurethane foam was commercially developed in the United States in the mid-1960's. Homes have been insulated with spray foam since that time. See similar questions...

The drying of any woodstain or clear coating will vary considerably with temperature and humidity. The colder or more humid it is, the longer the coating will take to dry. Too warm and the coating will dry before you can apply it properly. Always try to apply coatings when temperatures are between 10 and 30 degrees C and the relative humidity is around 50%. You should not apply a coating if the temperature is likely to drop below 10 degrees C within the next four hours. See similar questions...

About Polyurethane FoamPolyurethane foam is a material that was engineered during World War II by Professor Dr. Otto Bayer to replace more expensive natural resources like rubber. Rapidly expanding beyond the war uses it was initially designed for, polyurethane foam today is one of the more wildly used materials around. The diversity of uses is also impressive ? polyurethane foam can be found in everything from medical research labs to the cushions in your couch or chair. See similar questions...

We recommend three coats simply because it lasts longer. Three coats will leave your hardwood floors in good shape for at least 10 years barring excessive traffic and zero maintenance. Two coats will keep your floors in good shape for at least four years, maybe a couple of years more if you take real good care of them and traffic is minor. See similar questions...

We recommend lacquer because it is the best finish we have found for our products. The lacquer protects the wood from moisture, and at the same time penetrates into the surface, bringing out the natural beauty of the wood...lacquer makes the wood "come alive" (not to sound too corny, but it's true). The lacquer also provides a semi-glossy surface that is easy to clean, and looks great. See similar questions...

While I can't guarantee all those things, I will do my best at making recommendations and steer you in the right direction if you need some help picking out parts and materials. Keep in mind that what we build are custom basses and the bass you order will end up sounding how it ends up sounding. I use the best materials I can find. If you're putting the good stuff into a bass build it only makes sense that bass will end up sounding great. See similar questions...

Absolutely. A lacquer is an aluminum-based disc, covered with a plastic material that is cut by an engineer from your master tapes. It is the medium by which your music is transferred to disc to produce metal parts, which produces phonograph records. It is a vital part of record pressing. See similar questions...

One of the most protective finishes available, varnishes have very good resistance against abrasion, wear, Many furniture factories and large volume refinishers use lacquers because of their fast-drying characteristics the tradeoff we believe to be time v. quality. Oil based varnish does not dry very quickly, therefore it will take longer to complete a finishing project using varnish as opposed to lacquer, but the upside is a more durable, quality finish. See similar questions...

Lacquer is a man-made finish, which was developed after WWI. Lacquer is usually applied by spray gun. Lacquer is widely used on all new furniture since the 1940's. Lacquer is also widely used in most refinishing shops today. Shellac is an organic, natural finish created by the lac bug found in Indo-China in places like the country of India. Removing it from trees where the lac bug nests, dissolved and purified to different levels depending on its end use. See similar questions...

Not necessarily, once you have removed the lacquer you can maintain the brass quite easily with simple regular maintenance. First wash and dry your item with warm soapy water to ensure the brass is clean. Next you can polish with a cloth that has previously been soaked in a metal polish such as Brasso? and allowed to dry for 24 hours. See similar questions...

No, you do not. It was Bob Taylor who said, "A long time ago, some guy figured out that if you keep spraying and sanding a guitar, you can make it really shiny. We need to exhume that guy and shoot him!" While nitrocellulose lacquer has become "traditional" and a mirror-like lacquer finish is the standard, there are many other finish options including waterbased/waterborne lacquers, French polish/shellac, varnish, and various oil-based finishes like Tru Oil. See similar questions...

Lacquering or waxing silver is generally not recommended because of the difficulties in obtaining an even coating. If the coating has not been applied well, it may be uneven or have streaks and small holes, so that when the object retarnishes, it could look worse than if no coating had been applied at all. Lacquer will also eventually yellow and crack, allowing tarnish to form within the fissures and eventually under the protective coating. See similar questions...

A : We use automotive lacquers, so you tell us! We put a ground coat on the raw composite material, then usually add a color coat (or two) and then a clear coat, then the logo foils and fret markers (decals or hand-painted) go on, followed by a final clear coat or two. The lacquer reaches final hardness after a month or so, depending on whether additives for hardness or flexibility have been added. For example, fretless fretboards get a harder clearcoat applied. See similar questions...

The most common material used to make condoms is latex, a type of rubber with very small pores that keep sperm and the smaller HIV virus from passing through. Latex is strong but susceptible to breaking when exposed to high friction and excessive pressure. To mitigate these problems, a water- or silicone-based lubricant should be used both on the inside and outside of the condom. See similar questions...