Sorry bhai was out of town.
Good progress...... i told u earlier that buy a scrap car and use all the bits.....khair. Saeed bhai is a gem and helps a lot and guides well.
Namda is normally used in cars behind the dashboard to reduce noise and heat. u can see in pic as i had to remove dashboard of my car.
As for the coal tar, you can use rubbery sheets on the floor pans which our dentar called as "auto sheet " pasted on the floor pans. these sheets are available in market and i will let u know any link where u can buy these sheets. these sheets are way better than coal tar and works like original.
Also u can go to shop named "Soda Water Wala" near dilpasand shop on opposite radio pakistan. they deal in all kinds of rubbers, door rubbers, sheets etc.