Lay the banner face down on the floor.
Wipe the back of the banner to remove dust and dirt and provide a clean surface.
Pinch a small amount of museum putty between your index finger and thumb, and roll it into a ball.
Press the ball of adhesive in one corner of the banner.
Repeat the process of pinching and rolling the adhesive and sticking it to the back of the banner for each corner and every 6 to 8 inches between the endpoints on the top and bottom of the banner.
Grasp the two top corners of the banner, and lift so that the front of the banner is facing you.
Press the top two corners onto the cinder block wall. Run your hands firmly over the rest of the banner so each ball of adhesive on the back of the banner makes firm contact with the wall.