Alan1

Okay,i understand. Thanks again for all the help😊

Exchemist,when you end your post with"...Period.", i felt like you are shutting a door on my face,which is not polite. I admit that my main question in the title of the post had already answered and explained very good.I thank you all for your great help,but later,it lead me to wondered,whether all my other silicone greases can actually be safe in contact with potable water(i have several silicone greases,for different tasks,that i bought during the years)and that last question was to sum up and close the issue. You could say that this question(the one in my last post)can't be answered in an open forum due to .......,but please,don't shut the door on my face. Anyway,thanks again for your help.😊

Thanks for your answers.Those two answers were well explained in related to my question and cleared my doubt. So to sum and verify the issue, can i refer to every silicone grease as safe to be used in contact with potable water,even if i don't see any approval standard or it may be more accurate to say that most of the silicone greases are safe for that application but NOT ALL the silicone greases.So i need always to check further(msds etc.)if i don't see any approval standard? Of course that the easy way is to use a silicone grease with NSF61,but the reason for asking questions and consulting with experts is to learn and add knowledge,so you will know how to solve things later and don't make mistakes.In regards to this specific grease,it is not unknown silicone grease,it is silicone grease that made,primary,for diving equipments(o-ring,zippers etc.)and it has an MSDS,so it is not unknown.

Thanks for your replies,but it seems that you miss my point. I am familiar with the approval standards(NSF61/WRAS/DVGW etc.)that are related with potable water. I am not looking for a special silicone grease with an approval standard, as i have already have one,it is made to use in potable water's faucet and it is rated with NSF61 approval standard,but it is very small. As i have also some other silicone greases(larger size)that are not rated for potable systems,my question was refer to them. The MSDS that i attached before was one of them,it doesn't have an approved standard for potable system,but according to the MSDS, it looks like it safe to use it for that application and you all agree with that. So my question was,according to the specific silicone grease and its MSDS: If the item doesn't have approval standard for potable water systems,Can i conclude that it doesn't necessary mean,that the grease is not safe to use with potable water system and the MSDS information is what matters? Or if it doesn't have an approval standard for potable water systems,it absolutely not safe to use it in those application(potable water faucet's o-ring,for example)?

No,no stress at all,even not a bit. It is just a question to learn the issue. So,as in my case,can i conclude that if a specific silicone grease don't have approval standard for contact with potable water,it doesn't necessary mean that it is not safe to use it for that purpose,Am i right? Does it mean that all the silicone greases out there,that the primary use of them is not intended as a plumber grease,can be used with potable water? couldn't it be that some of them may contain impurities(in the Polydimethylsiloxane/silica)which may not safe to use with potable water?(those without the approval standard).

Thanks for all the responses. This specific silicone grease,as i mention above,is not sold as a plumber grease,it is sold as lubrication(among others)of diving equipments(o-rings,zippers etc.) and when i looked into the MSDS,it seemed to me as it is okay to use on faucet O-RINGS that are in contact with potable water. But as i didn't see any kind of approval standard on the package or in the MSDS ,i thought that i better verify this with you. My assumption was that if the item doesn't have a label that indicates that it is approved for use with potable water,it doesn't necessary mean,that it is not safe to use with potable water and the MSDS information is what matters,as the company maybe didn't add an approval standard due to other reasons(like economy reason etc.),even that it actually safe to use with potable water, Am i right? (Though the approval standard would have saved all the hassle of checking and searching) Yes,the washing liquid will help it on and it won't leave not residue,but as much as i know: The addition of a lubricant can extend the operating life of the O-ring by creating a barrier film over its surface. This barrier film can also help reduce leakage by filling the asperities between the metal surface and the O-ring seal.

Hi. Hi. According to the attached MSDS of a specific silicone grease (I deleted,on purpose,The brand name of it), Is it safe to use this silicone grease on o-rings,while it is in contact with potable water? This specific silicone grease is used,among other things,for lubricate diving equipments(o-rings,zippers etc.). According to the MSDS it contains:Polydimethylsiloxane: 90% (CAS:63148-62-9) Silica: 10% (CAS:7631-86-9). Those materials are,as i read,are considered to be safe in contact with potable water. The MSDS says that the silicone is physiologically compatible and it neither mutagenic, cancerogenic nor teratogenic. A toxicity to fish is improbable and when Oral swallowing on large amount,it may cause uncomfortable feeling in digestion According to those information,can i conclude that it is safe to apply this silicone grease on O-RING inside the faucets where it will be in contact with potable water? Thanks.