I use the food vacuum sealer and seal it up in the bag. I have tried screws in the applicator, tape, and just about everything you can imagine. The vacuum sealer works the best of anything. I just opened a year old used tube of Dicor for a fan install on the roof and the stuff was as fresh as new.
Be sure to put a plug in the applicator opening. While I have not had it happen, I did fear that the vacuum would suck the stuff out of the tube. Just a precaution.
2018 Jayco Greyhawk 29MVP
2019 Jeep Sahara Unlimited
2011 Cyclone 3010 Toy Hauler- Sold
2014 Chevy Silverado Duramax LML -Sold