Need advice on which thermal grease to get

I decided to clean out my computer yesterday, scraping away the solid thermal grease, brushing dusty places, etc., etc., when I remembered that I had no thermal grease on hand. I needed a quick temporary solution and thought orange hairgel was what I needed. 40 degrees celcius idling, to 30 degrees celcius idling. Anyways, I need to get thermal grease quick. Tell me which one to get.

shin etsu