An erosion protection device is described which is made of two or more components. Each component has an edge, surfaces on respective sides of the edge and at least one joining portion (a joining portion of a component comprises a recess in the edge and receiving portions on respective sides of the edge). Each recess has a base which is indented relative to the edge, and sidewalls which diverge as they extend from the base out to the edge. The receiving portions diverge relative to each other with the same slope as the sidewalls as they extend from adjacent the base of the recess away from the edge towards the respective surfaces. When joining two components together, a bonding medium is applied to the joining portion on one or both components. The joining portions are then brought together such that the space between the sidewalls and receiving portions of one component and the receiving portions and sidewalls respectively of the other component diminishes thereby squeezing the bonding medium therebetween as the components come together.