The Zerust® vapour capsule and Plastabs will arrive packed in plastic. They are activated once the plastic pack is opened. For the VC1 you can peel off the adhesive backing and affix to almost any surface inside of an enclosure. For the Plastabs, you can simply place them in your tackle box (always check area protected is correct for the size of tackle box). Writing the date of installation on the Zerust® product will help you recognise when it is time for a replacement. The zip bags will start working from the moment the item is sealed inside the bag.