We purchased the DIY kit having never done anything like this before we watched the instruction video a couple of times and off we went. We did the mixing of resin and hardiner in 1 litre batches which allowed us time to get used to timings and the method of doing the process. We have ended up with a wonderful looking flat roof and neighbouring properties have also made comment on how nice it now looks. A fab product and once you understand the process it went on within a day. Thank you for a good product the only comment I would add is perhaps a step by step written guide included in the diy kits. Thank you we are very satisfied with the product and the finished look.