Yeah it's alright it's got a shelf life though!
It's currently sealing up my exhaust wear it was blowing around the jions from cold!
It's defiantely messy stuff so wear gloves
I've found it too be abit tempremental though, it works best if you work it onto a hot exhaust as it sets more or less straight away, as other wise if it's not completely hardened when you start it up the gases just force it out of the way and you've got to do it all over again !!