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I used silicone spray to lubricate my trumpet's pistons. It's easier to spray the lubricant on the valves, but can silicone spray damage my trumpet? What about other general purpose lubricants?

I still have plenty of valve oil, but it takes a lot of time to spread inside the pistons.

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I find that it takes most time to screw open and take out the pistons and tighten after finished, not the action of applying the oil. It is sufficient to apply drops of oil, and then slide and turn the pistons inside the tube to spread it evenly. No big deal. – awe Aug 23 '13 at 10:24
You might want to avoid turning the pistons - if there is dirt in the valve there's a risk of creating horizontal scratches that might obstruct the vertical valve action. I have found that a few drops before and a few drops after playing and just pumping the valves a few times when back in place keeps the valve action in trim. (I have a feeling that I read such instructions in a Yamaha tuba manual, but I can't remember.) I haven't had any problems with any brass instrument since I started following this procedure. +1 for the screw open time being the time consumer. – Ulf Åkerstedt Aug 23 '13 at 13:54
Silicone binds to itself, so I'd say there's a good chance of this gumming things up. – Matthew Read Aug 23 '13 at 17:54
Well I cleaned my trumpet and relubricated it with valve oil. The silicone spray's effect didn't last long enough. Didn't notice any damage, but this doesn't mean it's safe to use in the long run. – Anthony Aug 23 '13 at 18:15
The reason is that silicone sprays (in my experience) are junk that doesn't actually contain very much silicone oil. Whatever is in there must have a very low molecular weight because it evaporates over a few days. – Kaz Aug 24 '13 at 0:47
up vote 3 down vote accepted

I have never used silicone spray, nor do I know anyone who has ever used silicone spray. My thoughts would be: use at your own risk - especially if oiling your valves isn't its original function.

In terms of damage, there are only a couple things to consider: Whether or not it will gum up your valves, and / or whether or not it is corrosive. If you find that it does/is neither of those things, then it shouldn't be a concern.

But please don't take my word for it - consult an instrument repair technician.

^Side Thoughts^

It doesn't take more than a few seconds to oil a trumpet's valves - I am guessing you're saving approximately 8 milliseconds by spraying instead.

Besides, couldn't you just put your valve oil in a cheap spray bottle and use that instead?

I have rotary valves, which are a lot more maintenance than piston. Be good to your instrument, and your instrument will be good to you.

Hope that helps.

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