Are wax balls safe?
Updated October 2, 2026. This page summarizes a government test; it is not medical or product-safety advice.
In September 2026, the Korea Consumer Agency (KCA), South Korea's government consumer protection body, tested 8 wax balls bought from Korean online stores. All 8 contained MIT and CMIT, two preservatives that Korea's toy safety standard does not allow, and one also released more boron than the standard permits (KCA, 2026). The test covered products sold in Korea; it did not test or name products sold in the United States.
What was tested
The KCA bought 15 tactile toys from major Korean online platforms, picked by sales rank, review counts and social media posts: 8 wax balls and 7 squishy squeeze toys (mallangi). It tested them against Korea's safety standard for toys. By law that standard applies to toys for children 13 and under; 14 of the 15 products were labeled for ages 14 and up, but the agency tested them against it anyway because children are likely to use them (KCA, 2026).
What it found
| Product type | What was checked (Korean toy limit) | Products over the limit | Amounts found |
|---|---|---|---|
| Wax balls | MIT and CMIT preservatives (not allowed) | 8 of 8 | MIT 3.90 to 9.87 mg/kg; CMIT 11.29 to 31.07 mg/kg |
| Wax balls | Boron released (1,200 mg/kg or less) | 1 of 8 | 1,533 mg/kg |
| Squishy toys | Phthalate plasticizers (0.1% or less in total) | 1 of 7 | 0.66% |
Source: KCA press release, September 23, 2026, test results table.
Lead and cadmium were not detected in any of the 15 products, and the other preservatives checked (BIT, phenol and formaldehyde) were not detected or were within limits. According to the KCA, MIT and CMIT can cause allergic skin reactions and eye irritation, and too much boron can cause digestive and metabolic problems (KCA, 2026).
The agency also heated the 7 squishy toys in a 1,000-watt microwave, because it had received reports of burns from people warming them to make them softer. Four burst within 25 seconds to 2 minutes 30 seconds, and surface temperatures reached 70.0°C to 171.2°C (158°F to 340°F). On labels, 8 of the 15 products left out basic information such as the importer or manufacturing date, 5 had no warning about heat and fire, and 5 of the 13 that look like food had no warning not to eat them.
What happened next
The KCA asked 17 businesses (13 sellers and 4 importers) to fix 13 products; 12 replied that they had stopped selling or fixed the labels, or planned to. The agency said it would press the 5 that did not reply through the online marketplaces and share the results with other government departments (KCA, 2026). A week later, a Korean parents' advocacy group called for a recall of all 8 wax ball products (iBabyNews, 2026).
The KCA's advice to shoppers in Korea: for children, choose tactile toys that carry Korea's KC safety certification mark; keep them away from heat and flames and use them only as intended; and stop using one and talk to a doctor if a skin rash, breathing difficulty or other symptom appears.
What this test does not tell you
- It covers 8 wax ball products bought in Korea. It does not say anything about specific brands sold in the United States or elsewhere, and we make no claims about them.
- It reports how much of each substance was in the products. The press release does not estimate how much reaches the skin during play.
- It is one test of a small number of products, published in September 2026. Later tests or recalls may add to it.
The virtual version
Wax Crush is a game on a screen. There is no clay, wax, preservative or heat involved, so nothing touches your skin and there is nothing to clean up. You can make and crack a ball here, read what a wax ball is, or browse ready-made balls.
Sources
- Korea Consumer Agency (한국소비자원), “[Consumer safety advisory] Harmful substances detected in some tactile toys such as mallangi and wax balls” (소비자안전주의보, press release in Korean), September 23, 2026, with the attached test results. kca.go.kr
- Hankyung (Korea Economic Daily), report on the KCA test (Korean), September 23, 2026. hankyung.com
- iBabyNews, “All 8 popular wax ball products contain MIT and CMIT; calls for a full recall” (Korean), September 30, 2026. ibabynews.com