From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Sheba's Viper fires boroton at the fire in the landing bay (TOS: "Fire in Space").

Boroton is a chemical used to fight fires. Apollo, Starbuck, and Sheba fly Vipers modified to fire boroton instead of lasers in an attempt to put out the fire in the landing pod (TOS: "Fire in Space").