This quick and simple guide will show you how to seal your items if you wish to trade/sell them to another character!
Step 1: Visit the Sealer (NPC Bosea) in Ardeca. You will first need to check with her by testing to see if the item you wish to seal is seal-able. All you have to do is un-equip the item and place it in your inventory then click on it when you open up Bosea's menu. If the item is seal-able it will appear in her NPC window and tell you how much sealing powder is required to seal the item. In this example it will take 30 pcs of Sealing Powder in order to seal a Dragonic Lachrymae.
Step 2: Buy the Sealing Powder. Once you know your item can be sealed and how much sealing powder is required to perform the action you can now buy them. You can either seal it yourself if you already have sealing powder or you can buy the sealing powder from another player. (Warning: You will need a Staff Member to assist you with this trade to protect you from falling victim to a scammer! Please do not perform any dshop trades without a staff member. If none is available, simply schedule the trade for another day when a staff member is able to assist you.)
UPDATE: You can now farm Sealing Powder in Parca Temple through the Sap Bottle Exchange. See NPC Binaelle Fairie in Parca Temple for details