LAST record preservative improves the sound

inna: "Didn't hear anything different". You're not supposed to! Last Record Preservative was designed to, as the name says, preserve LP's, to prevent their deterioration with every play. Not to make LP's sound better, but to prevent them from sounding worse. It keeps LP's sounding no worse with each play by preventing the vinyl from fracturing due to the friction, pressure, and heat created at the stylus/vinyl interface. 

inna said that there was no audible difference after a 2nd application of LAST Record Preservative. 

And, yes, LAST Record Preservative is designed to prevent deterioration. However, I stand behind my claim that it makes records sound better today. 

I applied it to both pristine and not pristine records, the result was the same. Very different music and pressings. Acoustic, electric, vocal. From McLaughlin's Shakti to Dead Can Dance to Miles' Bitches Brew and Pangaea to Mahavishnu Orchestra to flamenco singing. So maybe results do depend on the recording, the pressing and preferences. For my taste I heard nothing negative.
By the way, I also tried LAST tape head preservative. Same outcome. The difference is that for best results you have to apply it before each play. I usually do it every other play. It also cleans the head. It appears that the tape moves a little smoother.

Seems only appropriate to give a shout out to playing LPs wet.  Using that little red Audio Technica roller brush that keeps the water nice and smooth in front of the approaching stylus.  No more pops and clicks, no more groove noise, no more teacher's dirty looks.

g. kait

Last is absorbed into the vinyl, and is not a coating!

Last reduces record wear, and keeps records sounding great, if you care for your records properly.