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Thread: Silica Gell Dehumidifiers

  1. #1
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    Silica Gell Dehumidifiers

    I know about VP90 sachets, but does anybody use large silica gell packs in their gun cabinets.

    How many grams of the stuff would be appropriate for a 6-7 gun extra deep Brattonsound cabinet for example?

    And how often would it have to removed and heated up under normal indoor conditions? Every couple of weeks?
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    Under normal indoor conditions I can't see why you would need them at all ?

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    Quote Originally Posted by angrybear View Post
    Under normal indoor conditions I can't see why you would need them at all ?
    My house is a modern build, it's always been dry and feels dry too.
    The humidity levels indoors are low.
    I have a £1 shop dehumidifier in each of my cabinets and the amount of water they grab is scary.

    It's probably nothing to worry about - but at a squid, it's at least another line of defence.

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    I've got one of the large caravan jobs in mine. Either 500g or 1kg, can't remember off the top of my head. I've got too many rifles to fit in a cabinet so they are in a locked room, and one of the walls in an 'outside wall'.
    It's only been in there a week and the indicator hasn't started to change colour yet. Will check again tonight but I'm sure it will be months before I need to worry about it

  5. #5
    eyebull's Avatar
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    It's not been mentioned yet, but just in case anyone does, Calcium Chloride is not suitable for use in gun cabinets.
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    Quote Originally Posted by eyebull View Post
    It's not been mentioned yet, but just in case anyone does, Calcium Chloride is not suitable for use in gun cabinets.

    Why ?
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    Quote Originally Posted by eyebull View Post
    It's not been mentioned yet, but just in case anyone does, Calcium Chloride is not suitable for use in gun cabinets.
    Yep, because it sucks out all moisture -

    Use Napier VP 90 sachets, designed for gun cabinets -
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  8. #8
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    It's not just that it's too effective at sucking out moisture, the salts will also corrode steel.
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    Are the salts in the air , similar to the VP90 packs or is it a danger If the resulting liquid is spilt onto the actions?
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  10. #10
    eyebull's Avatar
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    Quote Originally Posted by gordon View Post
    Are the salts in the air , similar to the VP90 packs or is it a danger If the resulting liquid is spilt onto the actions?
    CaCl is normally in the form of large crystals, and direct contact should be avoidable, but there is a possibility that air movement could pick up particles and leave them on the actions.
    It's a low risk, high consequence-type situation.
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  11. #11
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    Thanks for the Information
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    Quote Originally Posted by eyebull View Post
    CaCl is normally in the form of large crystals, and direct contact should be avoidable, but there is a possibility that air movement could pick up particles and leave them on the actions.
    It's a low risk, high consequence-type situation.
    Just had a thought! is the risk still there if you use it in tablet form in a container as sold in Diy stores ?
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  13. #13
    eyebull's Avatar
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    Quote Originally Posted by gordon View Post
    Just had a thought! is the risk still there if you use it in tablet form in a container as sold in Diy stores ?
    Honestly I'm not sure of the exact degree of risk, but if silica gel is obtainable is it worth talking the chance?
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  14. #14
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    Ok , and thanks again for the info .
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  15. #15
    clunge is offline Buys suspicious amounts of hand sanitiser
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    I use a couple of 100g silica gel packs (available on your favourite auction site) in a margarine tub.

    There is a 1/2 inch hole cut in the lid.

    Every 2 months or so, I take 'em out of the tub and nuke them in the microwave for 3 minutes.

    This reduces the weight by 20-30g - being the water driven off. They need to cool down before going back in the tub.

    My efforts would have been a waste of time if I had not put draught excluder seals around the door.

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