Painted Earth offer several types of clear protection products for different purposes.
The surface you are applying it to, and the sheen level, durability and VOC content you are requiring, will determine which is the most appropriate one for your purpose.
For example ROCKCOTE Repel makes walls more water repellent whilst changing the look of the surface very little. Ideal on natural renders and paints because it maintains the breathability of the wall. ROCKCOTE Clearcote is a hard wearing acrylic film that is water resistant and long lasting. Ideal for walls where serviceability is key. MUROBOND Clear Acrylic Sealer is somewhere between the two - not as high build as Clearcote but with a little more sheen than Repel.