Seals an experimental affix on the item. The affix is moved to its own slot, leaving its old slot open for you to add a new affix.
The sealed affix cannot be modified further and an item can have a maximum of one sealed affix.
When an experimental affix is sealed you have a chance to gain a Glyph of Insight. This chance is higher for items with higher tier affixes, but cannot exceed 45%.
Press [F] to open the Crafting Panel.