be used in the manner described in fig2 regarding the manner of construction shown in fig7 the sealing system is adaptable to the width of any door or window thanks to one or two plates 50 of steel or any other metal or material offering similar solidity and watertightness these plates are shaped like the form 30 and parts 10 a and 10 b of marine wood which together take the shape of a gangue in which are inserted the two half panels of marine wood or any other material which offers the same watertightness and resistance to a depth that is variable to the millimeter as a function of the width of the door or window being protected the space between the two half panels 10 a and 10 b is filled below by a guiding ruler 70 which serves as a support to the two half panels 10 a and 10 b and prevents the pneumatic 20 from extending into the central portion towards the interior of the gangue the two metallic plates 50 form a hollow gangue and are bolted to the half panels 10 a and 10 b with watertight bolts 71 as shown in fig8 a and 8 d this sealing system in its basic version is composed of two half panels 10 a and 10 b of bakelited marine wood inserted to a depth in proportion to the width of the door into a steel gangue 50 and belted on a semi perimeter by an aluminum form 30 intended to guide and especially to protect an inflatable structure with an anti skid surface whose pressure on the walls ensures watertightness at least one of the two steel plates 50 includes an upper edge 36 that is bent at 90 u00b0 so.