(30 mins per door) 1 door can do double layers, 4 doors can do maximum 8 layers.
After doing this will improve in door sound proofing increase speaker bass and reduce road noise!
2 Material, same quality just different branding:
Singapore Technology : $50 per layer
Autofun Brand: $60/layer
This product was added to our catalog on Monday 19 February, 2018.