Chest freezers I have used many and have many used for storage outdoors along my building. Most all can bleed enough odor to allow flies to lay eggs that will hatch and maggots may get in. Or the flies themselves will get in.
I keep a commercial fly treatment ( Alpine Pressurized Fly Bait is its commercial name ) applied around the seal of the lid and I treat each bucket that is in the freezer. I will find hundreds of dead flies lying dead. This is usually considered a commercial operators insecticide. But I am sure they sell to just about anyone these days.
It is deadly on flies of all kinds. It is my line of defense on things of a critical nature that I must protect. They die in a few seconds of sponging the material. Dinotefuran is the active ingredient.
As far as protecting your material a good 5 gal bucket with a good O ring seal is step one. Step two is drilling and mounting a tire valve stem into the top side of the bucket.
This placed where the valve stem does not interfere with removing or closing the lid securely. I use a 1/2" paddle bit to drill the hole.This gives a very secure fit.
Just pull the plug stem from the interior thru the wall of the bucket until it seats over the bucket wall.
Remove the valve core stem. Replace the cap loosely.
I remove the buckets O rings and coat them with a good smear of Vaseline then re install the O ring into the bucket lid.
Here is my aging / venting and product storage system.
I have hundreds of buckets sealed, but breathing, some aged and stopped others still being monitored occasionally for progress.
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2022/09/full-965-150189-100_5295.jpg)
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2022/09/full-965-150190-100_5294.jpg)
This was my original bucket venting system I used many years ago. Then I figured out the tire valve stem idea. Never went back.
I use to put a piece of cotton or sponge into the vent hole during the gas off period.
Once age was completed and the material was preserved I put a golf tee up into the tube to prevent fly or insect entry.
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2022/09/full-965-150191-100_3740.jpg)
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2022/09/full-965-150193-100_3739.jpg)
Venting your buckets in this or a similar manner preserves your lids integrity and allows stacking buckets.We go 4-5 high to consolidate space. The old ways ruined your lids and prevented stacking.