Our Price: £18.37 As always, Bullet Roof ® delivers a high performance, quality product to finish the edges and details of your roof. Being a thicker gauge than the trims you may have used previously these will certainly not disappoint and ultimately add to the quality of the overall Bullet Roof ® GRP installation. These trims are also compatible with Bullet Roof ® Pu liquid rubber waterproofing systems. A250 Large Drip Trim 3m.