Drain cleaner / drain unblocker

Can I take Drain cleaner / drain unblocker across a border? Yes in many places, with conditions. Of the (no rules indexed) country-rules we've indexed for Drain cleaner / drain unblocker, 0 are allowed (often with limits), 0 are restricted (permit, declaration, or quantity cap), and 0 are prohibited outright. Customs rules depend on the destination, the purpose (travelling, posting, importing personally, or importing commercially), and the quantity.

Caustic + acidic drain-unblocking products — sodium hydroxide (NaOH, lye), potassium hydroxide (KOH), or sulfuric-acid-based formulations sold at retail under brands like Drano, Liquid-Plumr, Mr Muscle, Domestos Power Plumber. Most consumer-grade drain cleaners fall under IATA Dangerous Goods Class 8 corrosive Packing Group II (moderate corrosion) — forbidden in passenger baggage and restricted to cargo-only carriage with shipper's DG declaration. Some powder-form drain cleaners qualify for limited-quantity exemptions under IATA Section 2.7 if individually packaged under 1 kg in retail consumer packaging — but most carriers still refuse. Postal carriage to most destinations prohibited under universal postal-union restricted-articles rules.

Common mistakes with Drain cleaner / drain unblocker

• Assuming the rules at the origin apply at the destination — they don't. The destination customs authority is the binding rule.
• Travelling and posting are treated differently: an item you can carry may be prohibited by post (and vice versa).
• Personal vs commercial intent: above a quantity threshold, customs may treat your shipment as commercial regardless of intent.
• Undervaluing on the customs declaration to avoid duty — treated as fraud in most jurisdictions.
• Vague item descriptions on CN22/CN23 — biggest single cause of postal customs holds.
• Lithium batteries in checked baggage (must be in carry-on) or above the watt-hour limit without airline approval.
• Missing required certificates (phytosanitary, veterinary, CITES, prescription, product compliance).

Always verify against the destination's customs authority before acting. Not legal advice.

General notes