COSLUS E40 Earns ADA Seal of Acceptance, Advancing Clinically Proven At-Home Oral Care！

The COSLUS E40 Water Flosser has earned the American Dental Association (ADA) Seal of Acceptance.

The ADA Council on Scientific Affairs accepted the COSLUS Oral Irrigator based on its finding that the product is safe and has shown efficacy for removing plaque and helping to prevent or reduce gingivitis when used as directed.

Consumers can verify this recognition through the official ADA Seal of Acceptance record.

For COSLUS, the recognition represents an important step in making clinically supported oral care easier to incorporate into everyday.

In addition, three COSLUS water flosser models C20, C50, and C51 also received ADA certification under the same evaluation framework.

What Does ADA Accepted Mean?

An ADA-accepted water flosser has gone through the ADA Seal of Acceptance process, which requires manufacturers to submit scientific evidence supporting specific safety and efficacy claims.

The ADA Council on Scientific Affairs evaluates that evidence before granting the Seal.

For the COSLUS Oral Irrigator, the accepted benefits are:

• Helps remove plaque
• Helps prevent or reduce gingivitis

These claims apply when the product is used as directed.

The Seal should not be interpreted as meaning that a water flosser replaces brushing, professional dental care, or every other form of interdental cleaning.

Why the ADA Seal Matters When Choosing a Water Flosser

A product page can make many claims about comfort, pressure levels, tank size, or included accessories.

The ADA Seal is different because it relates to specific claims that have been reviewed through an independent scientific process.

That does not mean every ADA-accepted water flosser is identical, but it gives shoppers an additional point of verification beyond marketing language or customer reviews.

For people comparing water flossers, that can be especially useful when they want evidence behind oral-health claims rather than relying only on product specifications.

What the COSLUS E40 Offers Beyond the ADA Seal

The ADA Seal supports specific safety and efficacy claims, but the day-to-day experience still depends on how easy the product is to use.

The COSLUS E40 Water Flosser is designed around pressure control and everyday convenience.

10-Level Pressure Control

The E40 uses a rotary dial with 10 pressure levels.

Instead of switching between only a few preset intensities, users can make smaller adjustments until the water stream feels comfortable.

This is especially useful for beginners or people who prefer to start at a gentler level and increase gradually.

300mL Water Tank

The E40 includes a 300mL visible reservoir, giving users enough capacity for a more continuous cleaning routine with fewer interruptions for refilling.

Five Included Tips

The E40 comes with:

• Two standard jet tips
• One orthodontic tip
• One periodontal tip
• One tongue-cleaning tip

This allows the same device to support general daily cleaning as well as more targeted routines around braces, periodontal areas, and the tongue.

Cordless and Waterproof Design

The cordless design makes the E40 easier to use in smaller bathrooms.

It also has an IPX7 waterproof rating for use in wet bathroom environments.

How to Use the COSLUS E40

Using the E40 is straightforward:

1. Fill the reservoir with lukewarm water.
2. Insert the appropriate tip.
3. Place the tip in your mouth before turning the device on.
4. Start at a lower pressure level if you are new to water flossing.
5. Lean over the sink.
6. Guide the tip slowly along the gumline and pause briefly between teeth.
7. Adjust the pressure only to a level that remains comfortable.
8. Turn the device off before removing the tip.
9. Empty and rinse the reservoir after use.

For a full step-by-step guide, see our How to Use the COSLUS E40 Water Flosser article.

Frequently Asked Questions

Where can I verify the COSLUS ADA Seal?

The official COSLUS Oral Irrigator record can be verified on the American Dental Association’s website.

Does ADA Accepted mean the E40 replaces brushing?

No.

Water flossing supports cleaning between teeth and along the gumline, but it does not replace regular toothbrushing or professional dental care.

Can an ADA-accepted water flosser replace string floss?

Not automatically.

The right interdental-cleaning routine varies by person. Your dentist or dental hygienist may recommend water flossing, string floss, interdental brushes, or a combination depending on your needs.

The Bottom Line

The COSLUS E40 Water Flosser is ADA Accepted, with accepted claims for helping remove plaque and helping prevent or reduce gingivitis when used as directed.

Beyond the Seal, its 10-level pressure control, 300mL reservoir, cordless design, and included specialty tips make it a practical option for everyday water flossing.

For shoppers who want both independent claim verification and finer pressure control, the E40 offers both in one device.