There are a number of threads here, and with procedures too.
To sum it up: Clean the underside of the hood well - no loose debris or grime.
Use an entire can of 3M spray adhesive - the Heavy Duty stuff

Helpful hints: use an old bedsheet to cover the engine compartment while you are scrubbing the remains of the old hoodpad off. get a "friend" to help you with sticking the new pad on straight -because once it sticks...it STICKS.

Again...a search will give you more details and fill you in more.

Good Luck!

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D