Hard Top Acoustic Sound Deadener for Jeep. If your Wrangler JK came with a Hard Top then this kit is a must for you. The Sound Deadener insulation is custom fit for the factory multi-piece hard top and greatly reduces noise inside your vehicle. The special insulation material is surrounded by heavy duty pleated nylon providing added interior comfort by insulating the cab from heat and cold. A no drill installation with durable hook and loop fasteners allows for an easy installation in minutes without removing your hard top.