white smoke after mid pipe change

[isq0]

Is that an normal thing for a white smoke to apear after something has been replaced on exauste ?took a spind around town after garage and near by home white smoke started to come out of rear and it stunk like even doesnt know what (sort of like some chemicals burned) First thing that wcome up in my mind - thats it Game Over ... fckn head gone.but could it be the sealant the garage has used for the new pipe vapouring by the heat ?
I know it sound's sill but this is my first car and ive never had experienced anything like this

[JOHNDQ]

Is the coolant level still ok?

[isq0]

Is the coolant level still ok?

everything is allryt with coolant ect ... mid pipe was changed they used exauste paste and the exces of it burns out within 2 hours after.Went back toi garage asked them and they confirmed it.Lol on FB everyone went straight for an HGF that even i found a bit too silly but it's all good now.Just this is my first car so ... still learning stuff like that

[JOHNDQ]

Thats fair enough sometimes the exhausts have a coating on them so don't rust in the warehouse and stickers etc which burn off over time.