Bloon Liquefier (BTD6)

"Can glue one additional Bloon per shot and applies liquefying compounds that do 10 pops every second."

- In-game description

Bloon Liquefier is the fourth upgrade of Path 1 for the Glue Gunner in BTD6.

It increases the corrosion rate of the glue to 1 damage every 0.1s, or 2 damage every 0.1s to Ceramics, as well as increases pierce of glue projectiles by +1. As with all Glue Gunners with Corrosive Glue or higher, the Bloon Liquefier can target MOAB-class Bloons and damage them over time, although the glue itself will last half as long, similar to most types of glue, and does not slow them.

It costs $4,250 on Easy, $5,000 on Medium, $5,400 on Hard, and $6,000 on Impoppable.

Appearance
TBA

Summary
This upgrade deals decent damage to normal MOABs and Ceramics, as Glue Gunners with corrosive upgrades can now affect MOAB-class bloons. In general, Bloon Liquefier is in awkward position in the game because it tends to lack sufficient pierce compared to other competitors such as The Big One while only being slightly cheaper.

Tips

 * By itself, 4-2-0 Bloon Liquefier is usually better, as it has a lot more pierce. In a few select situations, 4-0-2 Liquefier can be used to damage blimps for longer periods, although Bloon Liquefier can easily destroy non-freeplay Ceramics anyway, which renders the extra glue lifespan and extra slowdown less useful for Bloon Liquefier alone.
 * The 4-0-x Bloon Liquefier essentially acts as an damage-oriented Bigger Globs Glue Gunner, so it's worth taking note that crosspathing variety is improved with this Tier 4 upgrade. Bigger Globs with Bloon Liquefier is basically +50% pierce, if not taking into account other pierce buffs.
 * Bloon Liquefier is capable of destroying a Round 40 MOAB on its own, but this does not necessarily mean it is reliable against MOAB-class bloons. Bear in mind that glue lasts half as long on MOAB-class bloons, so 4-x-0 Bloon Liquefier is only going to do a maximum of 110 damage to the MOAB until the glue wears off again after 11 seconds.

Trivia

 * When crosspathed with 4-0-1, there is a glob of yellow glue, even though it shoots green glue.
 * There was a bug in Version 23.0 where the 4-2-0 Bloon Liquefier with the "Splatty Glue" MK only has 8 pierce instead of the expected 9, as that MK grants +2 pierce for Glue Splatters. This was fixed in Version 24.0.