Window Board 90°/135° Internal Corner Joint
Window Board Plastic 90°/135° Internal Corner Joint
For use on rounded 23mm window sill boards.
This plastic corner joint is double-ended, so one piece can be used to join two window sill internal corners. One end is used for 90° corners, while the other which is designed for 135° corners can be used to fit anything from 120-150° corners.
This internal corner joint is for use on rounded 23mm window sill boards - it's ideal for laminated window boards.
Features & Benefits
- Available in three popular colours, they are a great choice for matching with existing window sills. The chocolate brown end cap can be used with mahogany and rosewood laminated window sills, while caramel is idea for oak, light oak, and sherwood laminated window sills.

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Product Information
Shipping & Returns
Shipping & Returns








Window Board 90°/135° Internal Corner Joint
Window Board 90°/135° Internal Corner Joint
Window Board Plastic 90°/135° Internal Corner Joint
For use on rounded 23mm window sill boards.
This plastic corner joint is double-ended, so one piece can be used to join two window sill internal corners. One end is used for 90° corners, while the other which is designed for 135° corners can be used to fit anything from 120-150° corners.
This internal corner joint is for use on rounded 23mm window sill boards - it's ideal for laminated window boards.
Features & Benefits
- Available in three popular colours, they are a great choice for matching with existing window sills. The chocolate brown end cap can be used with mahogany and rosewood laminated window sills, while caramel is idea for oak, light oak, and sherwood laminated window sills.

Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Window Board Plastic 90°/135° Internal Corner Joint
For use on rounded 23mm window sill boards.
This plastic corner joint is double-ended, so one piece can be used to join two window sill internal corners. One end is used for 90° corners, while the other which is designed for 135° corners can be used to fit anything from 120-150° corners.
This internal corner joint is for use on rounded 23mm window sill boards - it's ideal for laminated window boards.
Features & Benefits
- Available in three popular colours, they are a great choice for matching with existing window sills. The chocolate brown end cap can be used with mahogany and rosewood laminated window sills, while caramel is idea for oak, light oak, and sherwood laminated window sills.
























