Does the SR-A10 magnet mount "rubber boot" stay on or off when mounting to the metal roof of a vehicle?

The SR-A10 magnet mount should always be used with its accompanying rubber boot when mounting to the metal roof of a vehicle. This protective layer helps to guard the paint job from potential scratches and other damage by eliminating any direct contact between the magnet and the car roof. Moreover, this rubber boot helps to ensure maximum stability and grip power for the antenna mount, promoting a safe, secure hold.

You can use the magnetic mount without the boot if you struggle with achieving an acceptable SWR. The magnetic base also uses a mylar pad to reduce the likelihood of scratching your vehicle's paint.