This type of insulation and sound deadener when used on the inside of doors, where is it installed? What about rain? Can it get wet? How do you keep it dry?
I've used dynamat under the door upholstry on the inner door panel. I tape plastic sheet to the door panel first That way the plastic seals out moisture and air. The dynamat dampens (attenuates) sound vibrations. I have used the peal and stick rubber/plastic sound deadener's on the floor and trunk where you can't afford for moisture to get under it. It keeps the metal from vibrating. This kills resonance from the speakers and exhaust. I managed to get a Fox Mustang pretty quiet despite the Flowmasters.57halfton said:This type of insulation and sound deadener when used on the inside of doors, where is it installed? What about rain? Can it get wet? How do you keep it dry?
pasadenahotrod said:Many old cars used a glued-on sound deadener mat on the inside of the door and quarter panels in the passenger compartment. When and if the adhesive begins to fail the mat would flop out from the door skin. Subsequent to this any rain, sleet, snow melting and coming inside the door/quarter panel would pool in the mat and eat the door skin over time. Also, when these mats flop around they can jam window mechanisms.
That os whay most modern cars use a sprayed on material similar to bed lining.