The LAS1206 Single Batwing® Seal is a smoke and acoustic perimeter seal. Its 10mm high, single fin design creates a tight seal while minimising the force required to open and close the door. Made from a flexible elastomeric material, the fin springs back into shape after every use, ensuring long-lasting performance. Benefits Protects against sound, smoke, draught and light Can be fitted with minimal disruption to the door assembly Curved fins allow easier door operation Suitable for single and double leaf doors on the head and jambs Self-adhesive Easy to install Test evidence Smoke: BS 476-31.1:1983 Acoustic: BS EN ISO 10140-2:2010 (Up to Rw 35 dB) Durability: 100,000 cycles