Can you recommend suitable materials for packaging a sealant that is sensitive to atmospheric moisture? Additionally, we can do accelerated humidity testing of filled packages, but how do we correlate these with shelf life?
You can obviously package your moisture-sensitive sealant in glass or metal cans or tubes, which will totally prevent moisture ingress. Aluminum tubes are widely used for this type of product, as long as you have good crimps.
You can also use plastic containers. If you can handle a rigid cartridge container, then heavy-walled polyethylene containers will give suitable shelf lives for most products. If a thinner walled flexible container is better, it may be necessary to coat your plastic with a material with very low moisture vapor transmission rates, such as polyvinylidene chloride.