On Hymer and A Class models it is possible to use Noise Killer materials to soundproof areas that create excessive noise.
NoiseKiller Sound Barrier can be used on the floor areas and also under the dash/carpeted area in front of the steering wheel.
NoiseKiller Barrier Mat can be used on the interior bulkhead and interior wheel arches.
A Small NoiseKiller Engine Blanket is also used on the engine to reduce engine noise.
So the HYMER KIT consists of:-
1 x Full Sheet of NoiseKiller Sound Barrier
1 x Half Sheet of NoiseKiller Barrier Mat
1 x Small Engine Blanket