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In this video I tell you how I have soundproofed the entire car for very little money with Kflex or KAIFLEX type insulation from ALIEXPRESS, which is an insulator that is used to convert vans but which also works for cars and the result is truly surprising. Tell me what you think! Materials I have used: ALTERNATIVE AMAZON INSULATION (10mm): https://amzn.to/4bI84yl ALIEXPRESS INSULATION (10mm): https://es.aliexpress.com/item/100500... ROLLER FOR INSULATION: https://amzn.to/42ITouN CLEANING BRUSHES FOR DRILL: https://amzn.to/42ITouN Workshop where they repaired my window: https://maps.app.goo.gl/9eSDuSf3LPuDG...