Lets save the trouble of the call, as im sure many contractors will read this blog post prior to calling our office anyhow, by answering the frequently asked questions.
What you did wrong, can be read above.
How can it be fixed? At this point – the only corrective action is to completely strip off that sealant that has failed, and it needs to be re-sealed correctly using either a water based sealer or urethane based sealant. (We firmly stand behind the product, UreSea