ProFume vs Methyl Bromide: The Fumigation Choice for South African Commodities

If you store grain, run a mill, or ship commodities out of South Africa, the fumigant question has quietly changed under you. Methyl bromide, the default for decades, is now restricted, and most professional commodity work has moved to ProFume. This is a practitioner’s comparison of the two: what each does, what the Montreal Protocol actually changed, where methyl bromide still survives, and the one constraint most brands do not know about until they try to book a treatment. No brochure language, just how the choice plays out on a real site.

What is ProFume fumigation?

ProFume is a cylinderised gas fumigant, sulfuryl fluoride, used by registered fumigators to control insect pests across all life stages in stored commodities, mills, warehouses and structures. It is odourless and colourless, penetrates deep into stacked product and timber, and leaves no residue on treated commodities once aerated. The site is sealed, the gas is introduced and held for a set exposure period, then the space is ventilated and cleared before anyone re-enters. It is the fumigant most South African commodity and structural jobs now run on, precisely because it does what methyl bromide did without the ozone problem.

What is methyl bromide, and why is it being phased out?

Methyl bromide is an older broad-spectrum fumigant that has been phased out for most uses under the Montreal Protocol because it depletes the stratospheric ozone layer. From 2005, controlled uses of methyl bromide were prohibited for signatory countries, with narrow exemptions. It worked well and it worked fast, which is why it was so widely used, but its ozone impact made it a target for international phase-out. For a South African operation, the takeaway is simple: methyl bromide is no longer the default, and building your pest programme around it is building on ground that regulators have already moved.

ProFume vs methyl bromide: how do they compare?

The core difference is environmental: ProFume does not deplete the ozone layer, while methyl bromide does, which is the reason the industry shifted. Both are restricted-use fumigants that only qualified applicators may handle. ProFume penetrates deeply and leaves no commodity residue after aeration; methyl bromide acts fast but carries the ozone burden that triggered its phase-out. Being straight about it, ProFume is not a zero-impact product either, sulfuryl fluoride is a greenhouse gas, so the honest framing is that it is the ozone-safe alternative that replaced an ozone-depleting one, not a magically green gas. For eco-conscious operators, that distinction matters, and we would rather state it plainly than oversell.

Factor	ProFume (sulfuryl fluoride)	Methyl bromide
Ozone impact	Does not deplete ozone	Depletes ozone (phase-out driver)
Regulatory status	Current professional standard	Phased out for most uses, narrow exemptions
Residue on commodity	None after aeration	None after aeration
Who may apply it	Registered fumigators only	Registered fumigators only

Is methyl bromide banned in South Africa entirely?

Methyl bromide is not banned outright, but its use is restricted to narrow quarantine and pre-shipment exemptions under the Montreal Protocol framework. That means for a specific quarantine situation, a port or plant health authority may still require or permit methyl bromide, but for general commodity and structural work it is no longer the go-to. If a supplier is offering you methyl bromide for routine mill or warehouse fumigation, ask why, because for most of that work the ozone-safe alternative is now the professional norm. Exemptions exist for defined phytosanitary reasons, not for convenience.

Why does ProFume matter for export and ISPM 15?

ProFume matters for export because sulfuryl fluoride is an approved treatment under ISPM 15, the international standard for wood packaging in trade, marked with the SF treatment code. Timber pallets, crates and dunnage moving across borders must be treated and marked to an approved method, and sulfuryl fluoride sits alongside heat treatment and methyl bromide on that approved list. For a South African exporter, using a registered fumigator who can treat and document to ISPM 15 is what keeps a shipment from being turned back at the destination port. The treatment is only half the job. The marking and paperwork are the other half.

The constraint most brands miss: registered fumigators only

ProFume can only be applied by a registered, trained fumigator, and this catches more operations out than any technical detail. It is a restricted product with strict stewardship, so you cannot buy it and run a treatment in-house, and not every pest control company is set up to apply it. That is the access constraint: the moment you decide ProFume is right for your commodity, your options narrow to fumigators who actually hold the registration and the stewardship training. EcoPest is a registered ProFume fumigator, and commodity fumigation sits within our broader ProFume fumigation service alongside the eco-first pest management programmes that protect a facility between fumigations. Plan the treatment around a registered applicator’s availability, not the other way around.

How do you choose the right fumigation for your commodity?

Choosing the right fumigation starts with the commodity, the pest, the volume and the destination, not with the chemical. Grain in a silo, milled product in a warehouse, and timber packaging bound for an ISPM 15 market are three different jobs, and a registered fumigator scopes each on its own terms. The questions worth asking any provider are direct: are you a registered fumigator, is ProFume suitable for what I am storing or shipping, and can you document the treatment for my buyer or port? Clear answers to those three separate the operators who know the standard from the ones guessing at it.