The Asgard 12-inch Flat Finishing Box is an automatic drywall finishing box for applying finish coats of joint compound to flat seams and butt joints. As the box moves over the joint, it dispenses joint compound, levels the center, and feathers both edges in a consistent 12-inch pass. Its wider pass helps blend the joint into the surrounding board and supports wider skim-coat applications.

An adjustable crown dial controls how much compound remains over the center of the joint, giving the finisher direct control over the finished profile. The aluminum box uses anodized components for jobsite durability, and quick-release thumb latches open the pressure plate for faster cleaning and service.

Load the box from an Asgard Compound Loading Pump through a Filler Adapter, then connect it to an Asgard or compatible major-brand flat-box handle. The universal-style attachment makes it practical for crews adding Asgard finishing boxes to an existing automatic drywall tool setup.

Asgard offers a more affordable option for contractors building or expanding a professional automatic finishing system.

Key Features

• Application: Applies finish coats to flat seams and butt joints
• Working width: 12 in for wider finish and skim passes
• Quick-release access: Rear thumb latches open the pressure plate for cleaning
• Finish control: Adjustable crown dial controls the compound left over the joint
• Handle connection: Universal-style attachment designed to fit most major flat-box handles

How It Works

Run the box with the wheels leading and the blade trailing. The crown dial adjusts the amount of compound left at the center of the joint, while the blade feathers both edges.