Sealbreaker Fragment Valheim 1.0.20
Sealbreaker Fragment is a crafting material that stacks to 9 in Valheim. It is used to craft Sealbreaker.
“A fragment of a Dvergr sealbreaker.”
Sealbreaker Fragment is a material. The game describes it as "A fragment of a Dvergr sealbreaker." Each fragment weighs 0.5, and you can carry up to 9 in one stack. It can be teleported, so you can move it through a portal along with your other goods.
The only use listed for it is crafting the Sealbreaker.
Used to craft
Other material items
Acorns, 
Amber, 
Amber Pearl, 
Ancient Bark, 
Ancient Coin, 
Ancient Metal, 
Ashlands Gourmet Bowl, 
Ashwood, 
Asksvin Bladder, 
Asksvin Hide, 
Asksvin Neck, 
Asksvin Pelvis.