Blackout and thermal insulation: the silver coating and the black blackout surface of the blackout roller blind can effectively block sunlight and UV rays, and reduce the heat in the room. They provide strong blackout and privacy protection, create a pleasant dark sleeping environment and improve sleep quality. No drilling: comes with 12 nano-adhesive tape, which can be removed without leaving any residue and can be used better than suction cups. Ensures that the blackout fabric stays on the window for a long time and can also be removed and glued to other windows that require darkening. If the tape loses its adhesion after repeated use, it can be replaced with a new one. Wide range of applications: the roof window blackout can be cut freely. It can be used at home, in hotels, offices or even in caravans. Blackout fabric sold by the metre suitable for any size and shape of windows. Easy to carry and ready to use, blackout roller blinds without drilling made of thick Oxford fabric are a better choice than blackout films. Easy to install: install the window darkening in just three steps. Measure > Cut > Install. When cutting the sun protection blackout fabric, leave an edge of 2-3 cm, so that no light can penetrate through the edge. Make sure the window is clean and dry before use.