Electrum is a golden liquid with the special property of bonding to metal and rendering it virtually indestructible.
Liquid electrum is combustible, but it has a considerably higher flashpoint than liquid energon — a stray blaster shot will not ignite it, but a direct high-power shot will.
Electrum-augmented Transformers turn a golden color.
Most Transformers were unfamiliar with electrum, and the scientist Starscream was apprehensive about its properties. Electrum seems to possess an almost 'mythical' status.
Dreamwave comics continuity
In this continuity electrum was grafted only onto inanimate material. It's possible that the material of which Sunstorm was constructed is simply the form electrum takes when bonded to living material.
Transformers (2007) movie continuity
Decepticon drones erected a series of blockades fortified with the Cybertronian alloy electrum.
- Meister (2003)
- Japanese ID number: C-06
- Accessories: Photon Rifle, Missile launcher, 3 missiles
- This version of reissue Jazz is almost entirely constructed of vacuum-metallized gold plastic, based on Jazz's incredibly brief, non-speaking appearance in The Golden Lagoon. This re-issue is a homage to special gold-colored toys 20 years earlier which was declared 'electrum' to give it a stronger tie to Transformers continuity. A silver edition of Bluestreak received no such explanation.
- When Optimus Prime was submerged in liquid energon in the Keepers Trilogy, he was covered with an invulnerable 'silver coat.' This appears completely unrelated to the way electrum works (the matrix was involved, to begin with...).