Bothered by small gaps between your molding and wall? Fill them with an acrylic caulk after priming the wall and trim surface.
Some caulks are paintable but others are not, so make sure you read the label.
Use the little hole in your caulk gun handle to cut the tip of the tube at a 45-degree angle.
Carefully pierce the inner seal inside the tip using the seal puncture tool found on most caulk guns.
Load the tube into your caulk gun and squeeze out a small amount to start the flow. Have a damp cotton rag handy to clean up excess.
Start in one corner of your room, point the caulk tube tip into the crack, and gently squeeze an even flow of caulk along the crack.
Wet your finger and use it to smooth out and remove excess amounts of caulk. Have a damp cloth handy to wipe your finger clean.