LOL You guys are great! Using beer for the water test is a very much a real-world test. Everything you can do to improve the application of this type of material will add to the quality of the finished job. I like to disassemble - everything! Interiors can be R&R'd easily if you understand how they are assembled. Clean all surfaces! It doesn't matter if it's a surface hidden by a panel or not. Every possible surface of that vented moving vehicle collects debris. I also use 3M contact cement on the surface and the business side of the material before I apply it. Having a few different shaped rollers is helpful too. Don't be afraid to pop an air bubble to gain better adhesion, the hole will not be there for long. This adds weight to a car, but it removes enough noise to make it worth the efforts. It takes time to do this the right way and most people who work with this stuff should know the proper way to do it, but not all will do it with quality in mind. Plenty of shops will take your money and slam your car out the door as fast as possible. If you want this kind of work done to your car and you don't do it yourself, find someone who cares about their profession like these guys do. Quality work is not always easy to find - my customers that have jumped ship from elsewhere have been proving this to me for years.
Nice test! it seems like these sound deadeners, even if correctly applied, do leave some air bubbles underneath... I'd be more concerned of condensation rather than water penetration. If it's cold outside the cold sheet of metal could have some temperature difference with the inside of the car causing dampness inside the air bubbles. Being really confined spaces, rust is possible. Now it has to be said that normally these materials have good temperature insulation properties, so I think real condensation could happen with some degree of air flow under the mats. Also modern car panels have anti rust treatment (electrophoretic paint), that wouldn't allow rust to easily form, unless the surfaces are scratched. What is your experience? Could it be better to apply a clear coat paint, or any other form of protection to the body panels before installing sound deadeners?
I learned here that you J Roll from the center outwards. You gotta push the air pockets out! Second, J Roll the perimeter extra good. Extra good because this test proves that if water gets under Dynamat it gets held like beer in a stein.
Thanks. Yeah sorry about the sound quality, definitely not filmed in the Car Builders private jet😉It was feed back from the speaker onto the gimal we were filming with. Rookie error!
Check out our Instagram site. I have added updated 'stories' of its progress. I will complete another post later today, which will be 3 weeks later. No leaks or chemical reaction, just some mould growing on top of the beer 😝
