Abstract: A press-in astragal for installation in an overhead garage door retainer includes an elongated, flexible, resilient strip. The strip has a first surface and a second surface. A first protrusion and a second protrusion with a half arrow cross-sectional shape extend longitudinally along opposite edges of the first surface. The second protrusion faces opposite the first protrusion. A garage door seal kit includes the press-in astragal, an astragal retainer that accommodates the astragal; and mounting hardware to mount the astragal retainer to a garage door. The retainer has a first channel extending longitudinally along a first edge and a second channel extending longitudinally along a second edge. The first channel has a flattened C-shape cross-section and the second channel has a flattened C-shape cross-section facing opposite the first channel.