Sealing (screw) holes in FIbre glass

I find just buying a load of nozzles works well. just let the end harden. It will anyway whether you cover it or not. Next time you go to use it take off the nozzle and fit a new one. The part in the tube you are exposing will be pushed out and used. Cheaper than throwing away half used tubes. I'm using a tube of CT1 that was opened nearly a year ago.
 
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