Seeing favorable comments about the Permatex Right Stuff I went to their web site to get additional information.
At the site I found an additional Permatex RTV product 'Ultra Synthetic' said to be formulated specifically for synthetic oils.
I plan to run a light grade synthetic in this new motor so I contacted my local auto parts shop, They did not have it in stock but could have it in the next day.
I picked up the un opened package last evening. it was not opened, but appeared to have been around for a while. There was a code printed on the tube, I went on line and found that
is a date code - lot number. The date code on the tube I had just purchased 7KZ2338 is translated to; the first number is the year of manufacture indicator, so a 7 is likely 2017, the K is alphabetical order for the month of manufacture, so the K is November. Meaning the product I just purchased was manufactured in November of 2017.
I was concerned over the shelf life of the RTV, as with most not fully activated compounds, they may react even in a sealed package. I went back to the Permatex web site and posted a question to their tech line last evening. Their response is the Permatex RTV has a two year shelf life. So the product that I purchased in May of 2020 was already expired by 6 months.
I will be returning the Ultra Synthetic for a refund today.
When purchasing and working with RTV, pay attention to the manufacturing date codes.
Loctite products would also have a shelf life.
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