I used tons of this when building my scape. You can bond two rocks together in literally 10 seconds or less. I made some intricate structures using hundreds of tiny pieces of smashed marco rock. If I didn't use the accelerator, it would have taken weeks to build instead of a few of hours. It's great for filling gaps too. You can keep layering the glue and spraying the accelerator each time. And a tiny drop of accelerator goes a long way. You can use it to make any structure you can dream up, and it holds great... then use epoxy in key spots afterwards to ensure your structure is really strong.
Question to anyone who has used this... Has anyone used the accelerator for mounting corals? I know it's harmless after the glue hardens and accelerator dries. I'm wondering if it would have poisonous effects while the accelerant is still wet? For example, if I globbed some glue to a coral, plug, or a rock, put a drop of this on it, then go right into the tank to mount it, will it poison the water? It doesn't specify on the instructions or the bottle... THX