Colgate Blast Water Flosser Review

Colgate's move into water flossers made sense — it's a trusted dental brand at a genuinely accessible price point. The Colgate Blast Cordless is their main model sold in Australia, and it's become one of the most-searched budget flossers for exactly that reason.

What it gets right

At $39–55 AUD, the Blast Cordless includes 3 pressure modes — enough range to start gentle and step up as your gums adjust, which is more than a lot of budget flossers offer. It's compact and cordless, making it a reasonable travel option, and the Colgate name carries some reassurance if you're new to the category and unsure which brand to trust.

Where it falls short

The 150ml tank is on the small side, meaning more refills than a full-size countertop unit, and battery life (around 10 days of typical use) trails premium cordless models like the Waterpik Cordless Advanced. It also tops out at 3 pressure settings rather than the 10 you'd get on higher-end models, so it's a less precise fit if you have very sensitive gums or want fine control.

Build quality and what buyers report

Across the reviews we checked, the most common praise is straightforward ease of use for first-time water flossers, and the most common complaint is the small tank requiring frequent refills for a full mouth. We didn't see a pattern of major mechanical failures reported at a rate higher than comparable budget competitors.

Who it's for

The Colgate Blast Cordless makes the most sense as a first water flosser, a budget-conscious buy, or a second unit for travel or a kid's bathroom. If you already know you want maximum pressure control or a bigger tank, it's worth stretching your budget toward the Waterpik Cordless Advanced or Philips Sonicare Power Flosser instead.