Safe for plastics? I want to store gun magazines with plastic baseplates.

Hi, thank you for your question! It's absolutely safe for any kind of plastic. Be sure to clean those magazines inside and out for best results! Have a great day!

Can you use a food saver to vacuum seal these?

Thanks for your question. These bags have a reclosable zip-seal on them. You don't need any equipment to seal them. Vaccum is not required for VCI protection to work.

Can these be used in underground stash boxes for long amounts of time???

They have a stated lifespan. For their life they are good. But if you want true long term, you are looking for hermetically sealed, with dry nitrogen gas.

ASIN	B08RP6L12S
Brand	Cortec
Color	ブルー、透明。
Date First Available	May 3, 2024
Item Weight	59 g
Material	ポリエチレン
Model Number	VpCI-126

VCI 防錆ジップクローズバッグ (10x12インチ - 4ミル) Cortec VpCI-126 防錆トップシール VCIポリバッグ 金属保護用 (10袋パック)

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VCI 防錆ジップクローズバッグ (10x12インチ - 4ミル) Cortec VpCI-126 防錆トップシール VCIポリバッグ金属保護用 (10袋パック)