(30 mins per door) 1 door can do double layers, 4 doors can do maximum 8 layers.
As wish door is super thin and super hollow, after doing this will have drastic difference in door sound proofing increase speaker bass and reduce road noise!
2 Material, same quality just different branding:
Singapore Technology : $40 per layer (U.P. $50)
STP Brand: $50/layer (U.P. $60)
This product was added to our catalog on Monday 19 February, 2018.
