---
type: restriction
id: usps-powders-dry-materials-that-could-cause-damage
asset: shipping-restrictions-by-class
title: "powders - dry materials that could cause damage — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c4_018.htm
source_quote: "Powders must be packed in sift-proof containers or other containers that are sealed in durable sift-proof outer containers."
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "powders - dry materials that could cause damage"
carrier: "USPS"
restriction_type: "restricted"
scope: "all domestic mail"
conditions: "Powders must be packed in sift-proof containers or other containers that are sealed in durable sift-proof outer containers"
verified: false
unverified_fields: carrier, item_category, scope
---
**Item category:** powders - dry materials that could cause damage

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** all domestic mail

**Conditions:** Powders must be packed in sift-proof containers or other containers that are sealed in durable sift-proof outer containers

> Powders must be packed in sift-proof containers or other containers that are sealed in durable sift-proof outer containers.

Source: <https://pe.usps.com/text/pub52/pub52c4_018.htm>