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Glued Bloons pop one layer every few seconds.
~ In-game description

Corrosive Glue returns as the 2nd upgrade of Path 1 for the Glue Gunner in Bloons TD 6. It allows the Glue Gunner to deal damage to bloons over time while glued, corroding bloons dealing 1 damage every 2.0s seconds. In total, it can deal up to 5 damage (12 with Stickier Glue). Unlike BTD5, having this upgrade or MOAB Glue lets the Glue Gunner target MOAB-class bloons. Blimps affected by Corrosive Glue do take damage over time, but are not slowed down, and glue only has halved duration. As a Level 2 Glue, the Corrosive Glue can target glued bloons that lack any corrosion nor blimp slowdown.

Corrosive Glue has some crosspath benefits. Glue Strike self-synergizes with its own corrosion, dealing 3 damage per 2.0s. Super Glue increases corrosion damage from 20 to 21 and damages every 1.8s instead of 2.0s.

This upgrade costs $255 on Easy, $300 on Medium, $325 on Hard, and $360 on Impoppable.



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Corrosive Glue

The Glue Gunner gains a purple protective suit and green goggles. When combined with other tier 2 crosspaths, half of the suit will be purple and the other half will be the other path's respective color. When applied as a secondary crosspath for tier 3 and 4 upgrades, their respective suits gain a thin, purple, vertical stripe on the middle of their headgear.

Corrosive Glue will start damaging the glued bloons after 2 seconds and by 1 layer per that same time interval. Due to the previous upgrade, this will persist even if the current layer is popped. The base glue will last long enough to apply 5 layers of damage. Adding Stickier Glue will increase this to 12.

Corrosive Glue can be applied to MOAB-class Bloons, at the cost of halved duration, inability to slow them, and inability to soak through. This means that it deals 2 damage normally, up to 6 with Stickier Glue.

Corrosive Glue is considered to be upgraded to Level 2 glue, allowing it to override most glues without higher-tier Path 1 upgrades, with exception of MOAB Glue, Relentless Glue, and Super Glue. Strangely, MOAB Glue and Relentless Glue with Corrosive Glue are considered Level 2 glues.

Targeting Priorities[]

Corrosive Glue targets bloons using the standard targeting priorities. It shoots straight movement projectiles.

  • First: Targets the first bloon visible within its range.
  • Last: Targets the last bloon visible within its range.
  • Close: Targets the closest bloon visible within its range.
  • Strong: Targets the strongest bloon visible within its range.

Full Popology[]


Updated as of Version 41.2
Base stats
  • Glue:
    • Projectile, acid type, detects partial hitbox, 46 range, 1.0s attack cooldown, 0 damage, 1 pierce. Applies Corrosive Glue DoT, slowing bloons down by 50%, soaking all bloon layers, and dealing 1 damage every 2.0s, lasts for 11s. Classified as a Level 2 Glue. Can target MOAB-class bloons but lasts for half duration.
Crosspathing interactions
  • 2-0-2: Glue lasts for 24s instead of 11s.
  • 2-4+-0: Glue Strike and Glue Storm can corrode MOAB-class bloons for half duration, equal to the duration of the glue, and deals 3 damage per damage tick instead of 1.
  • 2-0-2: Glue slowdown increased from 50% to 75%.
  • 2-0-3: Can target MOAB-class, slows down MOAB-class by 37.5% for 12s. Classified as a Level 2 Glue instead of 5.
  • 2-0-4: Popped bloons create a Relentless Splat that stuns bloons within 12 radius for 1.0s, up to 6 targets. Classified as a Level 7 Glue.
  • 2-0-5: Popped bloons create a Relentless Splat that stuns bloons within 12 radius for 1.0s and blimps for 0.5s, up to 6 targets. Damage from damage-over-time increased to 21 damage per 1.8s. Classified as a Level 5 Glue instead of 7 and can override Level 5 Glue.
Monkey Knowledge interactions

Attack Interactions[]

See also: Attack Interactions/Bloons TD 6/Primary
Updated as of Version 36.0
Base attack(s)
  • Glue:
    • Acid Type (pops Black, White, Purple, Lead, Frozen) Acid
    • Single Projectile Single Projectile
    • Straight Attack Straight Attack
    • No damage to all bloon types (unspecified damage) No Damage
    • Corrosive Glue (Deals 1 damage every 2.0s for up to glue duration, lasts 11 Corrosive Glue (1 damage per 2.0s, all layers, lasts for 11s, 5.5s for blimps)
    • Slowdown (50% speed, regular bloons) Slowdown (50%)


Updated as of Version 43.0. Listed prices exclude external buffs, any sacrifices, and Monkey Knowledge.
[Module | Data] Purchase Sell
Costs Easy Medium Hard Impoppable Easy Medium Hard Impoppable
Upgrade (2-X-X) $255 $300 $325 $360 -
Total (2-0-0) $615 $725 $785 $870 $431 $508 $550 $609
Crosspath (2-1-0) $700 $825 $895 $990 $490 $578 $627 $693
Crosspath (2-2-0) $1,525 $1,795 $1,940 $2,155 $1,068 $1,257 $1,358 $1,509
Crosspath (2-0-1) $855 $1,005 $1,085 $1,205 $599 $704 $760 $844
Crosspath (2-0-2) $1,195 $1,405 $1,515 $1,685 $837 $984 $1,061 $1,180

This upgrade's prices (or included crosspath's prices) are affected by the following MK: BonusGlueGunnerIcon Bonus Glue Gunner, BetterSellDealsIcon Better Sell Deals



Corrosive Glue is useful as an early-game and mid-game option for handling normal bloons, especially early strong bloons such as Lead Bloons. It deals damage-over-time, which helps break down the affected bloons. In addition, the bloons will be soaked with glue for a considerable amount of time, slowing them down while simultaneously gradually chipping down layers over time. This can help assist other towers to destroy the affected bloons more easily. Corrosive Glue can be added on top of Glue Hose or Glue Strike to maximize the amount of soaked bloons. More importantly, this allows the debuff of Glue Strike and Glue Storm abilities to affect MOAB-class bloons.

However, Glue Gunners with Corrosive Glue fall back severely in late-game and become a nuisance with MOAB Glue, as Corrosive Glue will have the potential to override the blimp slowdown power of MOAB Glue.


  • This is useful for helping deal with large waves of lower-tier bloons, as while dealing damage slowly, the widespread effect can help whittle down clumps. Its particularly good at dealing with clumps of Pinks and Purples.
  • Corrosive Glue helps deal with Leads, and is one of the cheaper upgrades able to do so.
  • It is very effective when used with Glue Strike or Glue Storm , as the sheer number of bloons being glued will cause it to do fairly massive damage, which can help prevent the other towers from being overwhelmed. In addition, this crosspath will enable the glue from these abilities to stick to MOAB-class bloons, making them take extra damage.
  • This upgrade is actually usually seen as a downgrade in the later rounds. This is primarily because of the added effect of now affecting MOAB class bloons. Because it deals almost no damage to them and does not slow or soak through, it ends up wasting time and pierce gluing them, possibly letting bloons sneak through. Another issue is it can take priority over other glues, such as a MOAB Glue. Do not buy this upgrade if planning to use other glue gunners in tandem. Should almost always be ignored in C.H.I.M.P.S.
  • Another issue with the upgrade is it can easily lead to regrow farms. Comboing with a Grow Blocker can help alleviate this problem to an extent.

Version History[]

Balance Changes[]

Corrosive Glue can now target MOAB-class Bloons, but otherwise not much changed for most of BTD6's history. However, in 31.0, the corrosion speed increased somewhat, allowing up to 5 ticks of corrosion for the entire duration instead of 4.

Initial release (compared to BTD5)
  • BUFF Corrosive Glue can now target MOAB-class Bloons, although they won't be slowed and glue lasts for half duration compared to normal bloons
  • BUFF Corrosive Glue damage-over-time rate increased 2.3s → 2s

Bug Fixes and General Changes[]

Extra Notes (Version History)[]


Official artwork[]


  • The Corrosive Glue artwork is shared with Glue Splatter and Stronger Glue, except with different color schemes.
  • The way that Corrosive Glue deals with bloon hitboxes is modified when buying this upgrade. Instead of checking for the bloon's central hitbox like other Glue Gunners would, Corrosive Glue checks for the entire bloon's hitbox before attacking. The same applies with MOAB Glue.[1]