Sound, draft, heat, cold, and dust blocking acoustic joint filler for interior, non-moving joints and gaps. Colorized, versatile and ideally suited to filling gaps between the ends of permanent, semi-permanent, or movable partitions, head-of-wall and other conditions. For vertical and horizontal-plane joint-gaps from 1/2" to 6". Available in 26 standard colors, with non-invasive anchoring and rapid installation. Self-extinguishing, fire-retardant-acrylic-impregnated foam, factory pre-coated with high-quality silicone. Clean handling, UV stable, non-staining, low temperature flexible, high temperature stable. Supplied in full-story, 10-foot lengths, uncompressed and slightly oversized, material is compressed by hand and squeezed into the gap or opening. The material folds in its center along a tooled crease to absorb slight variations in substrates. The internal backpressure of the material locks it to the joint faces.