Sounds like a bit of a washboy situation - can do without - but it would save anybody using it.
Though I must say, my old man runs a window supply and fit firm and I've been able to Silicon pretty well at all types of thicknesses onto all types of surfaces and I don't use masking tape or any other tool - just my gun and my finger and a glass/mug of water to clean off and wet my finger (as you should NEVER lick Silicon!).
Though I have used masking tape on some large jobs and I rate the corner tape could have saved even me a few minutes so I'm sure it would still pay for its self soon enough.
