Was there sound deadener applied to the underside of the front fenders on the 65 mustangs. I remember removing a lot of the stuff when I broke down the car but now my memory is shot and I don't remember if there was any on the underside of the fenders.
I used raptor liner. It dries hard and probably doesn't offer the sound deadening properties of a softer heavier product like the factory used. However my intent was more to protect from damage due to stones being thrown off the tires.
This stuff is thin and dries hard over time. It's not a sound deadener like the thicker ones that block outside sound as a barrier. This bonds stiffly to the sheet metal to reduce the effect of the metal making it's own noise. This is the type of stuff you find bonded to late model cars to reduce the drumming and give even thinner sheetmetal a nice thick thump quality to it. You don't have to cover every square inch either; some guys cut it into thin strips and run it across the larger unsupported areas of sheet metal.
It can also be painted over if it's used on surfaces that might get wet - like fenders or even door skins.
My fenders have nothing. I'm pretty sure they are the original fenders too. I'm considering taping off zones and spraying lizzard skin under mine to dampen them and also for rock protection. I don't want to spray the entire underside of the fender. I will be buying a bucket full of the stuff for something else anyway so I will already have it.
65 2+2, 331, C4 presently apart for complete a restore
1979 Ford F150 custom, 302, C4, AC, tilt wheel, main transportation