iron or glue gun tip to the defective bead 20 such that it is heated above its melting point the melted bead 20 is then allowed to flow across the gap 38 to thereby cover the defect the repaired bead 20 is then allowed to cool and the ngv 30 can be tested again the present invention therefore permits the seal to be repaired without removing or necessarily adding further material to the blade this method thereby saves time in comparison to prior sealing methods in which the sealant has to be removed and reapplied where a defective seal is found once testing is complete the adhesive bead 20 can be removed by hand by peeling the solidified adhesive from the gap 38 the ngv 30 may be heated to soften or partially melt the adhesive to facilitate removal once removed very little residue remains the residue has been found not to gas turbine engine components and is generally burned off during operation of the gas turbine engine while the invention has been described in conjunction with the examples described above many equivalent modifications and variations will be apparent to those skilled in the art when given this disclosure accordingly the examples of the invention set forth above are considered to be illustrative and not limiting various changes to the described embodiment may be made without departing from the spirit and scope of the invention for example where the ngv includes film cooling holes the thermoplastic material could be applied to one or more of the cooling holes to seal these for testing different thermoplastics could be used for sealing the holes depending on the required adhesion properties.