Each door bottom seal has been carefully developed to deliver the maximum seal possible, cutting noise transfer between rooms by a significant amount. Our door bottom seals include units for both single and double doors, and you can opt for mechanical seals that will lift and drop as the door is opened and closed. This type of seal is especially useful in rooms where carpet pile may be thicker and restrict the easy movement of a door if a fixed seal is used. The 800 series also includes self-levelling door seals that will find the optimum seal when in position, providing exceptional noise insulation as well as reducing draughts and improving energy conservation too.