Silver Armor Coating (5e Equipment)
From D&D Wiki
Cost: 100 gp
Weight: 1 lb.
Silver armor coating can be applied to any 1 metal armor over 8 hours using a heat source. When a creature that is specifically susceptible to silvered weapons, such as a werewolf touches silvered armor, such as through grappling or making an attack without a weapon, such as a bite or claw attack, they take 1d8 radiant damage as the metal burns their skin.