you shouldn't put anything on it at all until it has healed over.
Keep it clean and dry. Water in the shower is fine. Some find drying the wound gently with a hairdryer helps in the first little while.
I've had two. The first one, the pad was a help, the second I only needed it for a couple of days.
Through working in emergency and theatre I have seen all manner of wound infection and they are the tips they give out.
Make sure you get some knickers that go higher than the scar. ie hipsters will have the top elastic right where it will be so sadly granny knickers are a must for a while, as are rolled waisted pants.