Toughen Construct
School: Transmutation; Level: Artificer 2
Casting Time: 1 standard action
Components: V,S
Range: Touch
Target: Construct touched
Duration: 10 min. / level
Saving Throw: None; Spell Resistance: No
Source: ECB, pg. 116
This infusion functions exactly like Barkskin, except that it only applies to creatures of the construct type.