Designed specifically for sealing holes drilled into bricks, the Dryzone DPC Plugs ensure an easy and efficient solution for filling DPC injection holes as part of the Dryzone system. The plugs measure 30mm in length and 14mm at their widest point. They are used to hold the plasterboard in position and allow a smooth join between boards. Use a 5.5mm drill bit to drill 4 - 6 holes at board corners and middle no closer than 25mm to edges. Tap in Positioning Plugs with a hammer, ensuring the final surface is even.