Slim 510 uses 510 standard resistance cartomizers (not LR) and the most popular are Boge (the ones in the 2.8-3.2 ohm range) and according to Liberty-Flights, slim 510 could also use the warmer 2.5ohm ones if you find them anywhere, but they will use your battery charge up faster. Do not put the 2.0 ohm ones on your slim 510 batteries. If you have Ego or Riva 510 or other fat battery or mod with 510 threads, you can use the 2.0 ones.
Vapor4Life is a KR808D-1 - it uses KR808D-1 cartomizers and size it is sold as a 2-piece there are plenty of prefilled as well as blanks - see Vapor4Life, SmokelessImage Volt, Bloogplanet MaxxFusion, Halocigs G6 - KR808D_1 can use any of those cartos as well as any blanks down to about 2.5 ohm (Vapor4Life WOW blanks are 2.5 ohm)
But I do not recommend putting that VG juice in a carto - it will change nothing. It will suck like a milkshake. Get some 20% or less VG juices for cartos. If you can only find 70PG/30VG that will work too but the carto will get sluggish sooner than with less VG.
Meanwhile, for use on your atomizer, try thinning your VG juice with a few drops of distilled water - that may help a bit on the atomizer.