Seam sealing your tent, the why and how.

I have been lucky to acquire a Nortent Vern 2, however the manufacturers state this needs seam sealing. Not a job I enjoy!
I set off to discover which tent materials need this doing and why. finally I share with you best techniques.
Nortent have an excellent explanation in their book of tents. They do use a cold needle and expanding thread technique, but reading between the lines it seems that a 20D outer due to its stretchier nature, compared to heavier yarns, requires seam sealing.
Some good links:
www.nortent.co...
www.nortent.co...
www.nortent.co...
www.msrgear.co....
3fulgear.com/2...
I am raising funds to buy backpacking gear for the scout troop where I am a leader . Thanks!
www.buymeacoff... is to get some backpacking gear for the scouts.