Blocking: Two painted surfaces sticking together when pressed against the other, such as doors and windows.
Blocking probable causes: Insufficient drying time before pressing the newly painted surfaces of doors and windows together. Lack of adequate ventilation will lengthen drying time. Using slow drying oil based paints. Excessive paint. Recoat before first coat is dry.
Blocking solutions: Allow the proper drying time per label directions. Free windows and doors from sticking before painting. Door and window jambs should be properly adjusted for free and smooth operation. Persistent blocking or sticking can be relieved with talcum powder.
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.