Hi to all. Few months ago I did ponder the merit of this DIY idea. The insulating material can be purchased from HomeFix easily at $10/tube. There are different diameter type and length, most brown and black. So must do rough measurement of our door circumference to decide on length to get.
But in the end I rejected it because I found out that our original Latio door seals are already of double-insulation type. If you look closely there are 2 circles of the seals around each door. That is why our car has outstanding noise insulation, compare to other cars like Sunny, Lancer, etc. The more you check, the more you will appreciate our Latio quality. My opinion was that adding additional layer will not increase SP by much lah.
And adding the DIY seal will definitely make the door harder to close, which I am not sure is something I want to endure everyday. Not to pour cold water lah, just share my 2cts worth of opinion.
And while at HomeFix, maybe you want to check out a 3M product that look like a spray can costing $15 (?). You just spray its contents to the wheel arches and the foam will harden very quickly, forming a hard resin like material to supposedly increase the noise insulation property at these corners (much like that done at SP shops). My friend told me a can is good enough for more than 2 wheel archs and it feel quite heavy. But personally I feel stock is good enough but those who are interested could try out and give FR lah.
