Dear modellers, depron/biofoam is now available at KineticHobbies.com and can also be shipped to your place. Checkout:
http://www.kinetichobbies.com/building-materials/depron-biofoam.html

Can you give the weight per square area of different thicknesses please? Also, is the lamination polyester film or paper?

OK. I saw in your website the lamination is clear polyester film 

Here's the weight per square area Sanjay sir:

1. 3mm (non-laminated): 139 g/m²
2. 3mm (laminated): 228 g/m² (+-5g)
3. 5mm (non-laminated): 258 g/m²
4. 5mm (laminated): 336 g/m² (+-5g)

Just FYI, the attached 39" (6.3" chord) wing with single side laminated biofoam weighs just 82 gms. Spar (single 3mm double laminated sheet + 350mm 3mm carbon fiber tube in the center)

Brilliant 

Thank you sir!

Our pleasure sir

OOh.... great build 

Vishal - do you use hot glue on depron? Or......?

Vishal sir.

What will be the approx. shipping charges to Chennai around 5pcs of 3mm and 5mm foams ??

Best contribution of the year to Indian aeromodelling.
Especially the size easy to ship.
+1 to vishal

What will be the approx. shipping charges to Pune around 5pcs of 3mm and 10pcs of 5mm foams ??

@Sanjay Sir I use exclusively hot glue now. It have also used fevibond (synthetic rubber based adhesive), but not directly on the foam. Only on laminated surface. That also works very well. However, you need to wait for some time for the glue to dry before sticking and also need to bit careful so that the glue doesn't drip on to exposed biofoam. Application is bit tricky also. With hot glue too, you need to be careful. Look for transparent glue sticks. Not slightly opaque ones. Transparent ones flows easily. Too hot glue guns will melt the foam. 60W is fine.

@rajsigma Thank you Rajesh

@K K Iyer Thank you Iyer sir I'm honored

@johnywalker8pm @niteenk Shipping any place within India for one box is Rs. 330 through FedEx surface mode. Please note that shipping will be same if you order 12 pieces or one piece as the carton is same size. Hence the quantity of sheets is fixed. 16 pieces of 3mm/12 pieces of 5mm.

which of the foam do you suggest for building an light weight and strong wing.

The wing you see here, was made out of 3mm laminated sheet. It's quite strong but the control surfaces flexes a bit. Not checked the weigh but it's light enough. 65mm laminated will make a very strong wing but will weigh more. Or you can make the body out of 3mm and control surfaces out of 65mm.

is that 5mm or 6mm

Sorry! Corrected. It's 5mm. Actually it's little over 5mm (may be 5.3mm). 3mm sheet too is little over 3mm.

just for checking the prices including shipping I did one small test I added the 3mm non-laminated and 5mm non laminated biofoam with shipping it came to rs. 1970. We get 28 sheets at the price of each coming to something around 70. Enough for building 20 planes. So 100 rupees a plane which is perfect.

The wing is looking nice.

Thank you Kiran

The wing on reply number three is build with which foam.

3mm single side laminated.