Glue Soak (BTD4-BTD5)

Glue Soak is the second upgrade for the Glue Gunner in Bloons TD 4 and the first upgrade on the 1st path on Bloons TD 5. When a Bloon is glued by Glue Gunner with this upgrade, the glue soaks through the bloon layers gluing all of its descendants. Without this upgrade, popping a glued bloon will make the glue disappear. In BTD4 or BTD5 Flash, gluing a Ceramic Bloon would be pointless without this upgrade, because Ceramic Bloons cannot be slowed down by glue in those games.

Update History (Bloons TD Battles Mobile)
4.9

Glue Soak price decreased ($200 → $150).

Trivia

 * The Pressure Hose from Bloons Adventure Time TD resembles the Glue Soak's glue tank.