Polyurethane works by maintaining firm control over the suspension unit it adjoins. In many instances, the rubber-bushed suspension component will only begin its function once the rubber's displacement is halted by supporting metal. When rubber bushings are distorted and smashed, they allow contaminants to occupy the areas they used to. Contamination of this kind guarantees a speedy demise to any suspension component. With the incredible popularity polyurethane is enjoying today in the automotive market, it's important to know what you're buying.
Many people think that color is the only difference in polyurethane.
Polyurethane can be formulated for many different characteristics, such as abrasion, elasticity, elongation, and tear strength. It is combining the durometer with the proper physical properties that makes for superior polyurethane parts. The liquid-casting process consists of liquid chemicals formulated, mixed, the cast into molds. Injection molding, on the other hand, is polyurethane in a solid form that is melted and squirted under high pressure into molds. To illustrate performance, a '93 Suburban with a GVW of 7900 pounds is hefty.