Stop silicone tubes from drying out, easy fix 

Silicone can dry out very quickly in the tube after its been used. If you're like me, you might have used it for a small job and then put it away for another one sealing it as best as you can. However, when you come back to it in a few weeks or months it's always dried out or at least the nozzle has making it difficult to reuse again. This is a quick, cheap and easy way of stopping it from drying out so that you can use it on your next job without the faff of having to unblock it or even having to buy another tube.