BrushSeal Twin-Row Excluder
4.5£10-14Draught blocking: High
Product photo
The double row of bristles is the main selling point here — it creates two layers of resistance against airflow rather than one, which makes a noticeable difference on a genuinely draughty letterbox. Installation is a simple screw-fit onto the inside of your door, doable in about 10 minutes with a basic screwdriver. The trade-off is that pushing thick post or parcels through takes slightly more effort than a single-row brush, though it's not a major inconvenience.
Pros
- +Double brush row blocks more draught than single-row designs
- +Easy screw-fit installation
- +Fits most standard UK letterbox sizes
Cons
- −Slightly stiffer to push post through than single-row
- −Brushes wear down after a few years