What's this? The Bloons have extra armor making them even tougher to pop!
~ Round 45 in Bloons Tower Defense 6
Bloons with metal bands round them have been fortified. They'll take twice as much damage to pop
~ Cuber's loading screen tips, BATTD

Fortified Bloons (also called Banded Bloons or Reinforced Bloons by some players) are a type of bloon that uses armor to take more damage from attacks before their current layer is popped, making them tougher to pop. This status was first introduced in Bloons Tower Defense 6, and can be also seen in Bloons Adventure Time TD. In BTD6, Fortified Bloons first appear on Round 45, starting with Fortified Leads.

Like any other Bloon ability, the Fortified ability can be combined with the Camo and Regrowth status to a bloon at the same time. However, the Fortified ability can be applied only to Lead Bloons, Ceramic Bloons, and MOAB-Class Bloons. The fact that MOAB-Class Bloons can have the Fortified property could cause them to be very dangerous, especially when Fortified Z.O.M.G.s, B.A.D.s and/or D.D.T.s appear in large groups. For MOAB-Class Bloons, the Fortified status applies to its children until its Fortified Ceramic Bloons are popped. Fortunately, for standard bloons, the Fortified status only applies to a bloon's outermost layer (e.g. if players pop a Fortified Lead Bloon, the Black Bloons it spawns won't be Fortified).

Fortified Layer Health

Bloon Regular HP Fortified HP Change Total RBE First appearance
Lead 1 4 (10 in BATTD)

+3 (quadrupled)/+9 (in BATTD; decoupled)

26 RBE Round 45 (BTD6)
Round 44 (BTD6, Alternate Bloons Rounds)
Round 40 (BATTD)
Ceramic 10 20 +10 (doubled) 114 RBE Round 46 (BTD6 and BATTD)
Round 39 (BATTD, Fortified Bloons Modifier)
M.O.A.B. 200 400 +200 (doubled) 856 RBE Round 62 (BTD6 and BATTD)
Round 40 (BTD6, Alternate Bloons Rounds)
Round 46 (BATTD, Fortified Bloons Modifier)
B.F.B. 700 1,400 +700 (doubled) 4,824 RBE Round 79 (BTD6)
Round 60 (BTD6, Alternate Bloons Rounds)
Round 68 (BATTD)
Round 53 (BATTD, Fortified Bloons Modifier)
Z.O.M.G. 4,000 8,000 +4,000 (doubled) 27,296 RBE Round 97 (BTD6)
Round 60 (BATTD, Fortified Bloons Modifier)
D.D.T. 400 800 +400 (doubled) 1,256 RBE Round 99 (BTD6)
Round 93 (BTD6, Alternate Bloons Rounds)
Round 73 (BATTD)
Round 69 (BATTD, Fortified Bloons Modifier)
B.A.D. 20,000 40,000 +20,000 (doubled) 98,360 RBE Round 200 (BTD6)
Round 100 (BTD6, Alternate Bloons Rounds)
Round 75 (BATTD, Fortified Bloons Modifier)

If the Fortified Lead/Ceramic Bloon also has the Regrowth property, the children will not be Fortified when they regrow back into the parent bloon (e.g. Regrowth Rainbows from a Fortified Regrowth Ceramic will regrow into non-Fortified ones).

Leaking Fortified Bloons also causes extra lives to be lost (e.g. Normal Lead = 23 lives lost, Fortified Lead = 26 lives lost).


To combat the Fortified Bloons players can use some of the following tower options:

Note that effects which remove the fortified property also cause the bloon not to count towards the Sapper achievement.



  • The Fortified ability is the only ability that can apply to MOAB-Class Bloons, besides the fact that the D.D.T. has Camo properties.
    • It's also the only ability that doesn't apply for all normal-class bloons, as only Lead, Ceramic, and MOAB-Class Bloons can have the Fortified property.
  • The description that appears when the player encounters a Fortified Bloon for the first time shows a Red Bloon with the Fortified property. Fortified Red Bloons are not possible in the game.
    • Although the Fortified property can't be applied on most bloons, all of them have their own fortified sprite in the game files, which may indicate that, at some point, all bloons were planned to have such an ability.
      • In BATTD players were able to see all bloons being Fortified, including the children inside the bloon previously popped. Now, after the 1.0.2 update, Fortified bloons act the same as they do in BTD6.
    • Before the 2.0 update of BTD6, Fortified Purple Bloons used to spawn in Freeplay rounds, in stacks consisting large amounts of Purple Bloons.
      • The Fortified ability only gives the Purple Bloon one health.
  • If a Lead Bloon or Ceramic Bloon has the Fortified property as well as the Regrow property, Children that regrow back into Leads/ceramics will not have the fortified feature
  • Fortified Regrow leads and ceramics only have 1 metal band while Fortified Camo bloons have 2.
  • Fortified Bloons normally start appearing on Round 45. Coincidentally, "45" ("forty-five") sounds a bit like "fortified".

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