Rubber Cement

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Item icon
Item altar

Table dividing line 1.png
Character appearance
Table dividing line 2.png
Item Pool Treasure Room.png Treasure Room
Added in AfterbirthGreed mode onlyItem Pool Treasure Room.png Treasure Room
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Added in Afterbirth (page 2, column 18, line 5)
Removed in Afterbirth (page 3, column 8, line 2)
Rubber Cement Defeat Mom's Heart 2 timesRubber CementRubber Cement

Rubber Cement is an unlockable passive item.

Effect[edit | edit source]

  • Makes tears bounce off walls, enemies and environmental objects.
    • Tears that bounce off of enemies bounce in random directions, whereas tears that bounce off of walls and other objects bounce directly back.
    • Added in Afterbirth † Tears bounce off bombs.

Interactions[edit | edit source]

  • Brimstone BrimstoneBrimstone Icon.pngTears are replaced by a laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.: Overrides Rubber Cement.
    • Added in Afterbirth Brimstone bounces off walls, creating a second beam that does half damage.
    • Added in Afterbirth Azazel's Brimstone will continue to full length after bouncing, but will deal half of damage.
    • Added in Afterbirth † Azazel's Brimstone will now no longer continue to full length after bouncing, and instead bounce as a regular mini-Brimstone.
  • Bob's Rotten Head Bob's Rotten HeadBob's Rotten Head Icon.png3 roomsUpon use, Isaac holds a poison bomb which can be thrown towards any of the four cardinal points and explodes on impact.: The bomb bounces back at the player upon hitting an obstacle.
  • Added in AfterbirthContinuum ContinuumContinuum Icon.png+2.25 Range Up. +1.5 Tear Height. Isaac's tears travel through walls and appear out of the opposite wall. Isaac's tears also travel over rocks and objects.: Overridden by Rubber Cement; tears will still bounce off of walls and obstacles.
  • Added in Afterbirth † The Forgotten: No effect on the skeleton form's attacks.
  • Homing Tears: Tears will bounce off enemies and home back in, but to deal damage to that enemy again they must bounce off a wall.
  • Ipecac IpecacIpecac Icon.pngReplaces tears with explosive and poisoning projectiles fired in an arc from the mouth.: Tears will bounce off of walls, but not off of enemies.
  • Lost Contact Lost ContactLost Contact Icon.pngEvery tear has a small shield which will allow it to block one enemy projectile.: Tears will bounce off of enemy tears.
  • The Ludovico Technique The Ludovico TechniqueThe Ludovico Technique Icon.pngInstead of firing tears, Isaac controls one floating tear that hover over obstacles. This tear deals constant damage when held in place over an enemy.: Overrides Rubber Cement.
  • Mom's Knife Mom's KnifeMom's Knife Icon.pngIsaac's tears are replaced by a knife that pierces enemies, can travel through obstacles, and can hurt enemies while Isaac is holding it. Holding down the fire button before firing increases its range and power.: Overrides Rubber Cement.
  • The Parasite The ParasiteThe Parasite Icon.pngIsaac's tears split in two when they hit something.: Tears will bounce off of walls without splitting, but split and bounce when hitting enemies. The split tears and the original one will bounce off everything.
  • Piercing Tears: Tears will bounce off enemies instead of going straight through them, but the tears can still damage enemies such as Knights that are normally invulnerable from the front.
  • Added in Afterbirth †Sinus Infection Sinus InfectionSinus Infection Icon.pngAdds a chance to fire a booger which sticks to enemies and poisons them.: Boogers stick to enemies, but otherwise they bounce normally.
  • Spectral Tears: Overridden by Rubber Cement.
    • Added in Afterbirth † Tears pass through obstacles but bounce off walls.
  • Sulfuric Acid: Overridden by Rubber Cement.
  • Technology TechnologyTechnology Icon.pngReplaces tears with a piercing laser with unlimited range. / Technology 2 Technology 2Technology 2 Icon.pngDecreases damage and replaces right eye tears with a unlimited range, piercing laser which fires continuously.: Overrides Rubber Cement.
    • Added in Afterbirth Laser bounces off walls, creating a second beam that does half damage.
  • Tiny Planet Tiny PlanetTiny Planet Icon.pngRange up and makes shot tears revolve around Isaac until they drop.: Tears no longer fly over obstacles but instead bounce very quickly along them, appearing to "vibrate".
    • Added in Afterbirth † Tears pass through obstacles but coast along walls, trying to maintain the circular trajectory.

Synergies[edit | edit source]

  • A Lump of Coal A Lump of CoalA Lump of Coal Icon.pngThe more distance tears travel, the more damage they will do.: Due to the greatly extended time that the tears stay on the screen, the Lump of Coal's damage increase becomes more effective.
  • Soy Milk Soy MilkSoy Milk Icon.pngTears shrink and do much less damage, but fire in very rapid succession.: The rapid fire rate allows large areas to be covered in bouncing tears.

Unlockable Achievements[edit | edit source]

In-game Footage[edit | edit source]

Seeds[edit | edit source]

 PC  ABW2 HYHK (Treasure room adjacent to spawn)

 PC  GN8E P6N7 (Treasure room adjacent to spawn)

 PC  2XA6 GY1F (Treasure room adjacent to spawn)

 PS4  1YR9 80SA (Treasure room adjacent to spawn)

 Vita  QRDH 161F (Treasure room adjacent to spawn)

 Switch  Greedier mode only 9YPV NFK8 (First Golden Treasure Room)

Trivia[edit | edit source]

  • The item's appearance is loosely based off Elmer's Glue brand Rubber Cement.

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