How does this tent do in the rain? is it pretty waterproof or does it require extensive sealing?

Tech Specs:

Material:

Dobby Oxford, Rhyorip zip panels, 1680 nylon bottom rand, Hypalon reinforcements 

Freestanding:

Yes 

Pole Material:

DAC featherlight 

Doors:

2 Double 

Clip / Sleeve:

Clips 

Floor Space:

60 x 87in (152.4 x 221cm) 

Interior Height:

40in (101cm) 

Ventilation:

Mesh windows, vented fly 

Weight:

6lb 6oz (2903g) 

Recommended Use:

3-Season backpacking