Machine to apply sealant on the profiles prior the assembling with corner cleats. With this machine, the quality of the window/door remarkably improves in the meaning of a better aspect of the window/door, a protection against corrosion initiation and a protection against air, water, noise and high/low outside temperature. Thanks to the combination between this machine and its specific sealant we obtain a solution that guarantees user-friendly operation and minimum maintenance. Furthermore the optimized application on the connection surfaces allows a considerable saving of sealant and minimizes the cleaning needs for external flaws.