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Message: <blockquote data-quote="defcon1" data-source="post: 1728837" data-attributes="member: 30064">Heh...they always have the option to buy me off... <img src="https://zerotohundred.com/forums/styles/default/xenforo/smilies/laugh.gif"  class="smilie" loading="lazy" alt=":laugh:" title="Laugh    :laugh:" data-shortname=":laugh:" />What irritates me is the amount of BS they spout selling, what is basically, glorified roof waterproofing sheets...The chemical nature of bitumen is not difficult to understand. By definition..."Also called asphalt or tar, bitumen is the brown or black viscous residue from the vacuum distillation of crude petroleum. It also occurs in nature as asphalt “lakes” and “tar sands.” It consists of high molecular weight hydrocarbons and minor amounts of sulfur and nitrogen compounds."In other words...the crap leftovers from the fractional distillation of crude oil. So, how does it feel to pay so much more for the "crap" than gasoline, which is the "cream" of fractional distillation?From the sticky tar...they mix in fillers that don't alter it's chemistry in any way, but provide some "binding" properties to the material converting it into sticky sheets and such for other uses...the way adding sand to cement allows you to form it, whereas if you add water to pure cement, you get a semi-liquid paste that will not hold it form.So, the so called "modified bitumens" are nothing more than bitumen mixed with powdered plastics. The same or similar stuff is used to plug leaks in your roof, or waterproof roofs in western countries, and hold stones together to make highways.The stiffness or hardness of bitumen is controlled by the addition of light oils. And that's why Ong's friend, the one who had it melt down in his door, made a mistake. The bitumen he used was for plugging holes in AC conduits...nothing wrong with it except that it's a softer grade of bitumen. Even then, it would have worked if he had kept the car cool long enough for the oils to evaporate off.I bought some "flashing tape" from the hardware shop just now. UK made stuff for waterproofing roofs and gutters. The reason I trust the Euro stuff is because they are manufactured to very strict ISO standards. So, if they say it softens at 80 degrees C, it will soften at 80 degrees C. Since I bought a small amount, they cost me, in square feet terms, as much as Raammat. But I only bought enough for experimentation. If it works, then we can scour the city for a cheap source of roofing bitumin tape or sheets, and I'll teach you how to manage it in your car.</blockquote>

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