CAULK:

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Handy? Get Your Gun

For most projects, you'll want to use a standard 10-ounce caulk cartridge. For it, you'll need a caulk gun ( above ). There are two basic types of hand-operated guns. Ratchet guns (about $3) have a notched piston, which pushes the caulk out. To stop the flow of caulk, you have to twist the piston with your free hand to disengage the ratchet. Smooth-rod guns ($5 to $10) are easier to use. To release piston pressure and stop the flow of caulk, you simply press the quick-release plate above the handle with your thumb.

For small jobs, like caulking around a new faucet or making minor repairs, consider buying a squeezable tube (right).

LAYING A PERFECT BEAD

Once you've decided what caulk to use, the perfect caulk job depends upon careful prep work and application. To clean old caulk and soap scum from tiles and porcelain surfaces, first use a razor knife or caulk remover then wipe down the entire surface with a residueless solvent, like isopropyl alcohol. Remove any mildew with a solution of one part bleach to two parts water. For stone, brick and concrete surfaces, use a wire brush to remove dirt and crystallized minerals, then vacuum up loose debris. With wood, scrape away loose paint and old caulk, then prime any bare spots.

Most caulks are designed to be used between 40 and 90 degrees. On the lower end of their working temperature, most caulks get thick and difficult to squeeze out. To prevent this, keep the tubes indoors until you need them, or store them in an insulated cooler when working outside in the cold.

These removable caulks are good choices for sealing drafts around older, double-hung windows.

To start a tube, most pros cut the tip of the tube at a 45-degree angle, although some prefer a straight cut for caulking corners. Whichever style you choose, don't make the opening too big. Cut the tip where its diameter matches the width of the gap you're filling. Then poke a hole in the tip to release the caulk. (Most caulk guns have a handy fold-out tool for this.)

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