BulletShield is installed over existing window and door glass by certified installers. Mounted either on the exterior or interior of current glass, BulletShield bullet resistant glass security panels anchor to existing windows to create a buffer zone between the primary glass and the BulletShield clear polycarbonate shield. Weather sealed and engineered for removal when needed, BulletShield is custom-made for every window opening and designed to blend in to the existing framing. BulletShield is nearly invisible upon a completed installation.