So I just got my thermal mod to apply to my 1080 and I found out that the thermal paste included in the kit wasn't in a tube. Since I had some Arctic Silver 5 laying around, I wanted to use that instead of the one supplied. However I recall seeing Youtuber mentioning they wouldn't recommend that brand when they were reapplying thermal paste on their GPU. So I wanted to ask here should I not use that paste for my GPU? Any harm in doing so? What brand should I use instead if I shouldn't use what I have? Thank you!

That's a picture of my stock TIM, as long as you dont apply with a paintball gun I think you will be OK ;)

I will note that AS-5 themselves sort of caution against being overly sloppy

Not Electrically Conductive:
Arctic Silver 5 was formulated to conduct heat, not electricity.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 5 should be kept away from electrical traces, pins, and leads. While it is not electrically conductive, the compound is very slightly capacitive and could potentially cause problems if it bridges two close-proximity electrical paths.)

So dont be a mess with it.

AS5 also has a ridiculously long cure time. The stuff evga dupplied has no break in. Thermal Grizzly and Mx4 also have no cure time.

Personally would use MX4 as safer and has always given me good results when putting watercool blocks on many generations of GPU's

MX4 FTW

Thank you everyone for the replies. Its very appreciated 

+1 for MX-4.