Mevushal Wine and the Seal

Wine is the one food where a bottle that was kosher when sealed can stop being usable because of who handled it. Why that is is a separate question; this is about what producers and buyers do about it.

What mevushal means

Some wineries boil their wine and label it yayin mevushal. The effect is that a non-Jew's handling — or that of a public Shabbos violator — no longer forbids it, and it stays permitted to drink.

Two conditions are required, and both are strict:

1. It actually boiled. Not heated; boiled.
2. It diminished in volume through that boiling.

The reason mevushal wine is outside the decree is worth knowing, because the whole modern dispute turns on it: boiled wine was uncommon. It was drunk occasionally, in small quantity, as a treat, and was not found in every house — and the decree was never extended to something uncommon. It was not exempted for a quality in the wine. It was exempted for being rare.

Two practical consequences follow immediately:

• Where a non-Jew will have access to the wine — a household with help, a restaurant with non-Jewish staff — boiling it removes the problem before it arises.
• Boiling only protects wine that has not yet been touched. Where a non-Jew handled it first, boiling afterwards does not permit it.

Expensive wines are generally not boiled, which is why the question keeps arising rather than being solved by the industry.

Kiddush on mevushal wine

The Shulchan Aruch records that kiddush may be made on cooked wine and on wine with honey in it, and that some hold it may not. The dispute is about what the boiling did: whether the wine changed for the better or for the worse — which also decides whether its bracha is hagafen or shehakol.

The accepted position is the first: it is hagafen, and kiddush is made on it. The Rema records the custom of using it for kiddush even where other wine is available. Some suggest seeking other wine where that is easy, to satisfy every view.

Pasteurisation: a genuine dispute

Most wine and grape juice today is pasteurised — typically at 85°C or above. Whether that counts as mevushal is not settled, and the two sides are worth setting out properly, because the disagreement is about a factual change in how wine is made.

The lenient view holds that it does count: the wine was heated, and Chazal did not distinguish between methods of heating. Pasteurised grape juice is treated as mevushal, and the conclusion reached is that pasteurised wine is not forbidden by a non-Jew's handling — with the note that one who is stringent lechatchila is to be commended, but that after the fact it should not be forbidden, since the Torah has regard for people's money.

The stringent view makes two arguments.

The first is about what "cooking" meant. Ordinary boiling drives off alcohol immediately and changes the wine's taste. Modern pasteurisation runs the wine through closed pipes — nothing evaporates, and producers deliberately engineer the process so the taste does not change at all. The observation added is that ordinary drinkers cannot tell pasteurised wine from unpasteurised. Something that only kills the bacteria is hard to call cooked.

The second argument is the stronger one, and it uses the lenient side's own reasoning. Mevushal wine escaped the decree because it was uncommon. If essentially all wine is now pasteurised before it leaves the winery, then the exemption's reason has collapsed — it is no longer rare. This is not adding to Chazal's decree; it is observing that the thing which kept pasteurised wine outside it no longer holds. A related point is made from the Raavad on date wine: something that could be mistaken for real wine should not be permitted through a non-Jew's handling, and pasteurised wine is indistinguishable from it.

Both positions are held by major poskim. Which your household follows — and whether it matters for grape juice as well as wine — is a question for your rav, and a real one rather than a formality.

Bottling, and why the seal is on the cork

Filling and closing the bottles is done by an observant Jew, and the bottle is marked with the certification and the certifying body's name. The label should also state the bracha, the Pesach status, and whether the wine is mevushal.

The detail that repays attention is where the seal goes. It is placed across the closure, so that opening the bottle destroys the kashrus marking.

That is deliberate. A label proves what the winery did. A seal across the cork proves that nobody has opened it since — so the bottle can only have been opened by whoever is holding it, and it keeps its presumption of kashrus until then. The seal is not a claim about the contents; it is a claim about the interval.

Wine sent or left with a non-Jew needs two seals — a seal within a seal, or a key and a seal.

And one closing point that shows how carefully this is thought through: even mevushal wine is sealed, although handling does not forbid it. The concern there is not touch but substitution — that the bottle itself could be swapped for another.