There are several common types of caulk. Silicone-based caulk - bonds to almost anything, isn't paintable. Acrylic or Latex-based caulk - similar to silicone-based caulk, but is paintable. Clear caulk - primarily good for allowing the project surface to show through. Concrete or Masonry caulk - ideal for concrete and masonry surfaces.
Caulk comes in 2 types of containers - cylinders and squeeze tubes. Cylinders requires the use of a caulk gun while squeeze tubes can be applied directly to a project surface.
Many types of caulk come in colors for matching the caulk color to the surface color.
Caulk can only fill in spaces about 1/4 inches deep, so large holes or voids must be filled in with some other material first. Then, caulk can be applied on the surface as a sealant.
Procedure for Using a Caulk Gun
Use the cutting tool to snip off the end of (or open) a new tube of caulk.
Use the thin metal rod to puncture the seal inside a new cylinder of caulk.
Put the cylinder of caulk in the caulk gun and use the trigger to pump caulk onto the surface of the project where desired.
Applying caulk in this way is called laying a bead of caulk. When the bead is in place, use a damp rag to smooth out the surface of the caulk and bond it to the project.
Some Common Exterior Uses of Caulk
Filling in the gap between a window and the molding (brick mold) around it.
Filling in gaps where different surfaces meet (such as a foundation and siding).
Filling in holes in the concrete block of a foundation (use masonry caulk).
Use a putty knife to make sure the caulk bonds to the surfaces around it.
Filling in the gap between a sidewalk and foundation.
Some Common Interior Uses of Caulk
Prevent moisture from getting into gaps between walls, bathtubs, countertops and sinks. Filling in gaps where different surfaces meet, such as ceramic tile and baseboard.