Lately i have been very much interested in building a RC Board 

Hence i go through a lot of vides on youtube and other places. But in almost every video they use a kind of foam

http://youtu.be/cxZLGVd1-Ps?t=7m21s

If you see the above video at 7:21 he describes the foam that is required, can anyone please help me identify that foam?

I have subboards with me would that can also be used?

Many thanks for all

Satya sir that foam seems to be local paper laminated depron
if you want to make a boat like that use the depron available at rc bazaar

Yes, paper laminated depron. It is available at EDALL hobby , Bangalore, not RCBazaar.

if u have the sunboard, u can use it too, just harder to bend or curve than depron.
just as pretest- dip it in water and see if it degrades, if it doesnt = usable.

Thanks guys, yes the sunboard is very hard to bend or curve. So where can i find a good 5mm depron sheets in Mumbai or anyone who can ship it to Mumbai?

http://www.rcbazaar.com/product.aspx?productid=1021

Thanks tanmay i have placed order for that i hope they ship it

Yup they'll ship. Btw for what are you using depron for ?

RC BOAT check the video in the first post in this thread

Wow sir
good luck