Electrum

Electrum is a golden liquid with the special property of bonding to metal and rendering it virtually indestructible.
This property is a result of its unique nature; electrum is an element with a molecular structure.<ref>"Element with a molecular structure"? Dreamwave's Generation One #3, you fail at science.</ref> It's also considered an alloy<ref>Alloy in Transformers (Glu)</ref> when in its bonded form.
Liquid electrum is combustible, but it has a considerably higher spark-point 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.
Fiction
The Transformers cartoon
Beachcomber discovered an isolated 'lagoon' full of electrum in a natural preserve, which was promptly seized by the Decepticons. Megatron destroyed the electrum rather than let the Autobots have it. The Golden Lagoon
Most Transformers were unfamiliar with electrum, and the scientist Starscream was apprehensive about its properties. Electrum seems to possess an almost 'mythical' status.
Dreamwave Generation 1 comics
Jetfire noted that Sunstorm's body was constructed of a substance similar to electrum, a by-product of Cybertronian bio-mechanics.<ref>No, we have no idea what this means.</ref> Skyfire
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.
Games
Live-action film series

Decepticon drones erected a series of blockades fortified with the Cybertronian alloy electrum.
Ironhide can use nova spray to turn the blockades brittle and destroy them. Mobile phone game
Transformers Legends
Beachcomber stumbled on a Golden Lagoon full of Electrum. Thrust also found it, and soon the Decepticons had all coated themselves and made themselves invulnerable. Though Megatron's forces soon had a victory over Omega Supreme, the Autobots coated themselves in Electrum too, and in the ensuing battle, the lagoon and surrounding glen were destroyed. The Golden Lagoon
Toys
Generation 1
- 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.
- Meister was an e-HOBBY exclusive, sold with Streak (anime version).
Notes
- In the real world, electrum is an alloy of gold and silver. See wikipedia:Electrum for more information. It is also the ancient Greek word for amber.
- It should also be interesting to note that Perceptor had discovered a rock containing gold and silver elements just before Beachcomber discovered the lagoon.
- When Optimus Prime was submerged in energon in The Transformers 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...).
- Though Japan has had numerous all-gold repaints as Lucky Draw figures (most of them being Optimus Prime), none of them officially represent electrum coated characters.
References
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