Glue contains an extreme solvent that melts bloons. While glued, bloons will pop twice every second.
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~ BTD5 Description
“
Extreme solvents melt two layers every second.
”
~ BTD6 description
Bloon Dissolver (BTD6) is the 3rd upgrade on path 1 for the Glue Gunner. It costs $2805 (Easy), $3300 (Medium), $3565 (Hard) and $3960 on Impoppable. It makes the corrosive glue more powerful, popping bloons 4 times as fast, 2 layers every second, Researching Bloon Dissolver will cost 7,500 and 20 on Bloons Monkey City.
In BTD6, this upgrade returns with the same path formation and the same costs. Despite the description, it does not pop down two layers every second, but instead pops one layer every 0.575 seconds.
Similarly in BTD5, this upgrade is great against any bloon type up to Ceramic (but not Super Ceramics). It deals decent damage against MOABs, but not enough to be worth utilizing.
Regrow Bloons can be easily countered with a minimum of Bloon Dissolver.
Gallery
Bloon Dissolver In Bloons Tower Defense 5
BTD5 icon
The Bloon Dissolver note from www.btd5.com
BTD6 icon
BTD6 tower and artwork
Official BTD artwork
BTD6 Crosspathing (top path 2, bottom path 3)
BTD6 official upgrade icon
Green glue blobs
Glue Splatter splash with Bloon Dissolver
Instamonkey icon for Bloon Dissolver
Trivia
A possible reason why the Bloon Dissolver/Bloon Liquefier wears a protective suit might be due to the extreme corrosiveness of the glue which might harm them.
BTD5
The glue becomes green with this upgrade, making it hard to see when on Green Bloons.
Due to the fact the time of the bloons being glued lasts slightly shorter in an update, thus, it is possible a non MOAB class higher ranked bloon can survive being glued by the 3/0 glue gunner without being hit by other towers.
A 3/0 Bloon Dissolver can destroy Ceramic Bloons with their children before the glue disappear, making the x/1 upgrade useless, unless you want to upgrade it to x/2 upgrade, the same goes with Bloon Liquefier.