these tools generate enough heat to set wood or hidden debris afire, the risk posed is much less than
Figure 3-11. Heat gun
k. Caulking Guns. Caulking guns come in two different styles. One style is cartridge-loaded,
and the other is loaded by unscrewing the gun end and filling the body with bulk compound. The guns
are used to-
Fill cracks between window frames or doorframes and the building's structural walls.
Fill cracks in masonry surfaces before painting.
Fill the crack between the baseboard, interior woodwork, or wallboard and before
Disperse asbestos or fibrous roofing cement onto shingles.
Ensure that the guns are cleaned after use because the unused caulking compound will harden and ruin
3-2. Power-Operated Tools. You can save much time and effort by using power-operated tools.
Additionally, several operations can be performed by the same power unit by using different
attachments. For example, one power unit can accommodate a grinder, a sander, or a buffer.
a. Power Wire Brushes. Use power wire brushes to conserve man-hours in large work areas.
Use the brushes to remove paint from wood, masonry, or metal surfaces, and corrosion from metal
surfaces. You should use brushes made of fine spring steel. Figure 3-12, page 3-12, shows two wire-
brush types that are used on an electric or air motor, a flexible-shaft machine, or in the chuck of an
electric drill. They can also be mounted on a