whats the best fluid for long lasting Lps.

Ptaldorr, if you're committed to applying a preservative, the LAST Record Preservative seems to be least likely to do harm. But, my recommendation is to focus FIRST on excellent cleaning using one of the very effective record cleaning fluids such as Disc Doctor, Record Research Labs or Audio Intelligent. If you're not using one of these (or a couple of others), you're simply not hearing your records at their best even though you're using a very good rcm.

FWIW, I used a home brew cleaning fluid, a VPI HW-17 rcm and LAST preservative. Once I started using Disc Doctor Miracle Record Cleaning fluid and brushes (together with my rcm), I started getting consistently superior sonic results from my LPs, and I've stopped using the Last preservative. My philosopy with many many used and new records in my collection is now: clean very well before 1st play with Disc Doctor, use a carbon fiber brush before each play, handle and store correctly. I have no doubt that my collection will last beyond my lifetime.
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to rushton and elizabeth,thanks,and where do i get the disc doctor and does it act as a laster for lps.i have a full gallon of nitty gritty pure 2, is it good compared to disc doctor.

http://www.discdoc.com -- Disc Doctor just cleans, it does not change the vinyl nor does it add a coating to the vinyl. I've never used the Nitty Gritty fluid, so I can't compare to it. If you want something that act as a "preservative" on the vinyl, use LAST.
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thanks rushton.pat