Injecting suspension bushings.....

[George M]

not so Hector...Windo-weld is designed to take a big sun load...used for bonding windshields to car bodies..
NVH is an auto industry acronym for Noise Vibration & Harshness. You want more??
It typically has a high RPN on every DVP&R and every DFMEA....a very critical aspect of just about any component design in a car...as every single component is more or less a tuning fork with resonant frequency and the key is to design everything to harmonize which is really the opposite...you want cancelling resonant frequencies for a quiet car. The companion term to NVH is BSR...or Buzz Squeak and Rattle...related but different..qualitative terms but quantifiable. An instrument panel is generally designed to particular frequency based upon the rest of the car and tuned with the cross car beam under the dash. I digress.
Don't know of any rollerblade wheels in the 90 range for hardness...most run 72-88 which is a relatively dense/hard grade of urethane. Soft wheels are generally desireable for inside skating on slick floors...I run 78 durometer indoors...like at the Pontiac Silverdome in the winter time. I run 82 durometer outside on rougher surfaces where you want a little less rolling resistance because traction isn't an issue.
Haven't performed a hardness test on Windo-weld but would guess it to be quite a bit softer than rollerblade wheel urethane.
HTH,
George

[Well, that's interesting!]

Haven't worked on polymers in a while. I looked up my surface engineering handbook and PUR has big uses in the military for aircraft finishes, maintenance paints, metal and plastic coatings. It looks as though much has been done in the area of UV stabilizers to prolong paint life but generally polymers don't fair well under UV light.

[Hector]

that post was by me.

[George M]

say wha? Most cars on the road today have front and rear polymer bumpers...lol...many of which are TPO. Highest UV sun load is in the car under the windshield where polymer dash boards and many plastic steering wheels live.
Guess my plastic Saturn won't last very long in the sun.

George

[Hector]

with no UV stabilizers. Does your car have anti-dent plastic panels? Just curious.

say wha? Most cars on the road today have front and rear polymer bumpers...lol...many of which are TPO. Highest UV sun load is in the car under the windshield where polymer dash boards and many plastic steering wheels live.
Guess my plastic Saturn won't last very long in the sun.

George

[George M]

yes it does bro...do luv the plastic panels..only the hood, deck and car's skeleton are metal.
George

[Unregistered]

Speaking of noise, vibration, and harshness: How well would Window Weld work as a vibration dampener? Specifically, I've considered using an adhesive such as Scotch construction foam tape to hold flat lead weights (wheel balance weights should work pretty good.) to areas and places of greatest vibration and, therefore, noise generation.

For example, the heat shields under the cars: Why not dampen their vibration & noise with stick-on weights, and/or use some adhesive with dampening properties such as Window Weld might have? Perhaps just running a bead of it across vibration-prone sheet metal would make a major improvement in lowering noise, without adding significant weight.

Your thoughts?

And, regarding urethane and heat: Urethane is the preferred film for headlight covers, per website on Google. It's gotta be good with heat, or skateboarders could not run on summer streets, which get hot enough to fry eggs.

[George M]

pretty much every component on your BMW is tuned with an eye toward sound abatement. I don't recall adding a single thing to my car for sound because the engineers did a masterful job. Adding a small bead of Windo-weld would be insignificant to dampen sound because it it the ratio of the masses that matters...you would need to add a lot of WW to quiet it down significantly. Every design is a compromise. Adding sound deadner to a car is a noteable example. Reducing mass is as important if not more so than making things quiet...adding mass is not desireable. Personally aside for adding foam tape to the occasional couple of parts that rub together and make noise (BSR), I wouldn't do anything else to these cars for sound.
As to adding urethane film to headlight covers...different ballgame than what you asked previously which is to add Windo-weld to headlight covers. Urethane does have a fairly high heat tolerance....but presume the headlight film is compounded specifically to endure very high heat which is much higher than any side walk in the summer time.
George

[Unregistered]

What I had in mind is sorta like putting a small amount of duct tape on a wind chime, or some chewing gum on the middle of a kettle drum: A little bit of dampener in the right (max vibration node) spot can do a lot to quieten things down. Hence the question about putting a bead of Window Weld here and there for the sake of quiet.

(BTW, BMW engineers ARE pretty good, but nobody's perfect. If you don't believe that, then check into the Beemer website for Boxer bikes, and you'll discover the vaunted BMW engineers have pretty well screwed the pooch on clunky/breakable transmissions, surging engines, brake master cylinders, excess weight, and a few other things. They made these mistakes on what is essentially an 80 year old design. So, I don't always genuflect at the rondell.)

[George M]

many times it isn't the engineer...its management and cost containment that screws up the design of a component or system. With twenty years working as an automotive engineer I know what close to perfect looks like and it is seldom achieved.
BMW due to their target market and lower production volume affords higher profitablility per unit sold which in turn allows development with better materials and higher focus or less compromise. The talent of the engineers is not thwarted by the system in other words. Aside from random assignment of noise reduction proposals you mention above...let me know what part of these cars you would like to add some windo-weld to. As I stated before, there is nothing wrong with the noise levels in these cars. My E-32 is the most solid car I have ever owned and doesn't possess a single squeak that shouldn't be there....as close to "perfect" as I have seen.
George