Loss of the protective moisture seal due to the loss of initial adhesion and flexibility.
CAULKING FAILURES CAUSES
Filling too large an opening. Wrong type of caulk for particular applications and exposure. Aged non-acrylic caulks that dry out lose their adhesion and flexibility. Considerable movement or prolonged contact with water will need special caulks/sealants.
Select a caulk that best serves your situation. Apply according to directions. For most interior painting, 100% acrylic caulks are recommended. They will seal cracks and adhere to most surfaces, even when moisture is present. Don't paint or silicone caulks.
PRIMERS & INTERIOR FINISHES
Priming is essential for better adhesion, sheen uniformity, mildew control and durability. Select a top quality interior paint in the color and sheen of your choice.