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