What is HNBR, you ask?

Modern “rubber” does not contain any natural rubber. It is fully synthetic and called NRB, which stands for Nitrile Butadiene Rubber. HNBR (also known as HSN for “Highly Saturated Rubber”) is Hydrogenated NBR. It is a form of super-duper NBR that outperforms regular NBR as far as operating temperature range, resistance to chemical and atmospheric exposure, and, most importantly, strength. The only downside of HNBR is that it is way more expensive. For parts that are labor-intensive to replace, like CV boots: It is way more cost effective because it lasts so much longer. Buyer beware: You can’t tell if a “rubber” part is HNBR or if it is regular NBR (or even natural rubber, for that matter) by holding it in your hand—which makes it hard to know if the item is made of the ”good stuff” or not. But if it is a GoWesty DuroGreen part: You can rest assured it is made of the absolute best stuff for the job!

At GoWesty, we know materials matter—especially when it comes to elastic polymer (“rubber”) parts. Do you ever wonder why OEM parts seem to last many years, but often the replacement parts break down in a matter of months? It’s because manufacturers had to support every part of their vehicles for at least ten years or suffer the consequences of customer dissatisfaction and ultimately loss of sales. The devil is in the details when it comes to the stuff of which parts are made. Just because it looks the same doesn’t mean it is the same! You can have two identical-looking parts in your hand and one of them might be complete junk. If you have a DuroGreen GoWesty part in your hand, you can rest assured it is made of the very best, high-quality material for the application.

We make our proprietary polymer parts green so you can tell it is a genuine, properly engineered, maximum-durability part available only from GoWesty!

Every DuroGreen product comes with a 10-year, no-hassle, 100% satisfaction guarantee.