This kit will produce over 1400 litres of expanded high density, closed cell foam with a fire rating B2, resists ignition of the foam. The kit comes with 10 nozzle heads (in case you leave foam to cure within the nozzle head you can excahnge for a new one), a proessional spray gun and 4.6 metres of hose to reach the typically highest points within a loft space with hose to spare. The kit is sufficient to cover 56 M2 sqaure metres of foam at a depth of 25mm or circa 30 M2 at a depth of 50 mm. Actual coverage will depend on the skill of the sprayer, ambient temperature and the tempreature of the chemicals with optimum temperature circa 20 to 25 degrees C. Use this kit for larger DIY areas such as insulation for roofs against tiles, felt timber, walls and floors.