The present invention provides a vibration-insulating rubber molded product having
flash, where a thicker portion of the flash can be easily evaluated by visually
observing a light-transmittance thereof to prevent the product from 5 cracking,
and to find damage of a mold used for forming the product with ease.
The vibration-insulating rubber molded product of the present invention comprises
a rubber component, a silica powder and a carbon black. The content of the carbon
black is determined such that (a) a portion having a thickness of 1 mm or less
in the flash is substantially transparent or translucent with white or gray color,
and that (b) a portion having a thickness of 2 mm or more in the flash is substantially
opaque with black color, whereby whether the flash includes a portion having a
thickness of 2 mm or more can be evaluated by visual observation.