Many cars have rattling issues. These issues are much more prominent with ICE. Rattling kills the comfort and pleasure during driving and is a nightmare for an ICEd car.
Many brands and solutions of damping/sound deadening are available in the market such as Noise Kill, Dynamat, Stinger Road Kill, Second Skin etc. These solutions are expensive. Noise Kill being the cheapest damping material which retails at Rs.120-150/sq ft. is still considered to be expensive and out of reach for many.
I was in same dilemma, 4 months ago. I had an entry level setup in my Verna, was facing rattling issues even when not using the ICE. My budget was limited, hence Noise Kill was out of question. Had read and researched about many of the alternative damping solutions such as Yogamat stuck with Fevicol SR adhesive, styrofoam etc . None of them suited my needs.
Found Bitumen sheets on a local hardware store. These sheets appeared to be same as damping sheets, were bulky and dense.
Bitumen Sheets locally known as 'damar' sheet or Tarfelt sheet is industrially used as waterproofing solution for warehouses.
Bitumen sheets are made up of Neoprene, which are the same material to be used in Dynamat, Noise Kill etc. (which also have an additional layer of aluminium and fire resistant material). Thickness is about 1mm. These sheets have a thin protective plastic layer which is peeled off to reveal the sticky layer just like the conventional damping sheets. The plastic layer is hard to peel off as it is very thin and tends to tear while peeling off from the parent sheet. The sticky layer has a good adhesion quality and easily sticks to metal/plastic just like conventional damping.
Comparison with Noise Kill :
Quality and efficiency of Bitumen sheets cannot be compared to Noise Kill. Conventional Damping Sheets are designed to perform accoustically and have greater density, additional layers of fire resistant material & aluminium, greater thickness, good quality, easy application and better protective plastic peel off. However, conventional damping is way too costly compared to Tarfelt sheets.
Tarfelt sheets prove to be an alternative damping solution which is inexpensive, effective and efficient for basic ICE setups at moderately high volume.
For advanced ICE setups and experience Conventional damping is strictly recommended.
As per my experience, the effectiveness of Tarfelt damping is around 60-70% effective as Noise Kill damping at Moderate Volume levels.
Comparing the Density :
36 sq ft of Noise kill weighs 5.2 kgs. Which is 145.5 gms/sq ft.
48 sq ft of Tarfelt Sheet weighs 4.8 kgs. Which is 100 gms/sq ft.
Noise kill is 1.5 times denser than Asphalt sheet.
When using asphalt sheets some cautions are to be taken care of :
- The exposed sticky layer tends to stick on anything, should stored and handled cautiously or you'll end up with black stains in table and marble(in my case )
While handling the sheets, use of polythene gloves are recommended. Applying oil lightly on fingers and palms is also recommended.
The protective plastic is to be peeled off. Make sure the sheets are cut in adequate size which can be handled easily. The exposed sticky layer is then applied to the applicable metal/plastic panels and firmly pressed with help of paint roller or palms. Use of multiple layers (upto 3) overlapped is recommended for better results. Hair dryer or Heat Gun (better) can be used for heating the applied sheets for better adhesion.
- Asphalt sheets tend to stick themselves, they should be handled carefully.
Second layer complete, preparing for final (top) layer.
Sadly, I don't have the applied Final layer pics.
Availability & Costs :
Tarfelt sheets are easily available in renowned hardware stores locally in your city. They are widely used for waterproofing purposes.Price may vary from Rs. 20-100/ sq mt depending upon the quality and thickness.