The seal blocks are usually installed on the bottom and top of the inside and outside of the sliding door or window, so as to effectively fill the gap between the upper and lower of the window frame at the junction of the inside and outside of the uPVC sliding window sash. The seal blocks can play a good role in sealing doors and windows, and improve the stability of uPVC window sash and the external windows.
The seal blocks are usually installed on the bottom and top of the inside and outside of the sliding door or window, so as to effectively fill the gap between the upper and lower of the window frame at the junction of the inside and outside of the uPVC sliding window sash. The seal blocks can play a good role in sealing doors and windows, and improve the stability of uPVC window sash and the external windows.