Hard No-Show Day Mouth Guard for Teeth Grinding and Clenching


Defend Your Teeth From The Daily Grind

Tension headaches, jaw pain, teeth sensitivity and teeth breakage are all common side effects from continuous clenching and grinding. Don’t let teeth grinding and clenching destroy your smile.

We know how frustrating it can be to deal with this problem, which is why we created the Sentinel Mouthguards Hard No-Show Day Mouth Guard.

Our custom-fit mouthguard is specifically designed to protect your teeth from the damaging effects of teeth grinding and clenching during the day. Made from a hard, durable material, our mouthguard offers superior protection and comfort, so you can go about your day with confidence and ease.

At Sentinel Mouthguards, we understand that finding the right solution for your teeth grinding and clenching can be a challenge. That’s why we’ve developed a simple and easy-to-use mold kit that allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouthguard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.

Easy 1-2-3 Process!

3 east steps to receive your daytime mouth guard


With years of experience and expertise in the dental industry, you can trust Sentinel Mouthguards to provide you with the highest quality products and exceptional customer service. Say goodbye to the discomfort and pain of teeth grinding and clenching during the day, and say hello to a better, more comfortable you with the Sentinel Mouthguards Hard No-Show Day Mouth Guard.

Please note: if you have 2 or more molars missing, this product may not be suitable as the missing molars can jeopardize the fit.

Smile and Communicate With Perfect Ease

  • Invisible daytime mouthguard offers maximum protection and easy communication
  • Relieves symptoms of daytime clenching and grinding including headaches, teeth pain, jaw pain, neck tension, facial pain, teeth sensitivity
  • Prevents teeth damage such as cracking & chipping
  • Protects the jaw and relieves sore joints
  • Satisfaction guarantee + 6 month warranty

Do you need your custom day mouth guard as soon as possible? You can speed up the process by selecting the expedited shipping option during checkout. This option includes all-inclusive USPS Priority Shipping and a quick turnaround time of just two business days, so you can receive your mouth guard sooner and start enjoying the benefits of superior protection and comfort.

Product Description

why choose sentinel mouthguards graphic compare to dentist made custom night guard

  • Sentinel Mouthguards® No-Show Day Mouth Guard is designed to be virtually undetectable in the mouth.
  • Instant relief from jaw pain, facial pain, headaches & tooth sensitivity. Wear your daytime mouth guard without anyone noticing!
  • Protect against teeth breakage, cracking, damage. Combats pain or tenderness of TMJ
  • Safest materials. BPA, Phthalate, Silicone, Gluten, MMA, Latex Free. Learn more about material safety here
  • Made in the USA by professional lab technicians
  • Easy to use do-it-yourself impression kit ships within 24 hours after purchase
  • Perfect for everyday use in the office, gym, or anywhere! Use anytime you feel stressed or when you’re more prone to teeth clenching
  • Protects veneers, crowns, dental work. 
  • Superior Fit- Proper Jaw Support- Maximum Breathability, Comfort, & Protection.
  • Guaranteed to make you smile or your money back!

example of damage from teeth grinding and jaw clenching


Not sure which guard is right for you? Take our 60 sec. quiz!

which mouth guard is right for you take our quiz

Additional Information

Guard For

Upper teeth (most preferred), Lower teeth


Non-binary (all dental tray sizes will be included), Female, Male

Product Reviews

  • Ray Pulisciano


    I tried to wear the boil & bite guards with no success. I grind and clench my teeth badly during the day and at night. Got this one for the daytime. Process was easy and guard is comfortable. Super friendly staff! Great buy!

  • Michael Oneil

    I wear it all day every day!

    Couldn’t be happier with this night guard. I can’t stand night guards but this is different. There is no pressure on my teeth. Just stays in place and prevents my teeth from clenching while I’m working. I’m happy with the product and company.

  • Mary A. Franklin

    I needed something that was not going to take up a lot of space in my mouth. The night guard I replaced was big and bulky. Overall, I like and it’s exactly what I paid for & wanted. Shipping was fast. Couldn’t have asked for anything better. *****

  • Brooke R.

    Really helps with my constant clenching. Fits great and not chunky like my old dentist made guard. Super friendly office staff! Thumbs up!

  • Pedro K.

    Loved this so much I ordered a backup. Fits beautifully. This is the first time I’ve ever worn a custom made guard and I’ll never go back. Thank you!

  • Joanne Garnier

    I was hesitant because I didn’t know if I could take my own dental mold of my teeth.
    I messed up the first time but the kit included a backup putty pack. I emailed the company a picture and got an immediate response that the dental mold was good to go.
    Guard fits well. *****

  • Amy Hopkins

    So, first off, these products are made here in the USA and the company is transparent and helpful about the products they use. I have a gluten allergy and I’m also very cautious about the use of plastics. I contacted several other companies and asked them about the safety of their products. Sentinel was the only company to provide me with detailed information about the materials they use. I feel comfortable ordering from them because of this. I’ve worn the guard for several weeks now and have no complaints. Very happy with this product and would highly recommend for daytime teeth clenchers like myself.

  • Jeff Mesker

    I took several weeks to evaluate this product before posting a review.

    Pros: The impression kit arrived quickly and had an extra putty pack for when I messed up (which I inevitably did)
    It’s sturdy (I went with the 2mm) and comfortable. I can smile and talk with it in.
    It’s discreet. The price was good. Way better than my dentist.
    They hold on to the impression in case I want to order a backup.

    Cons: The actual guard took about 1 1/2 weeks to arrive after I mailed in the impression. Wish they would do a faster turnaround.
    The instructions should say to mix impression putty VERY quickly because I waited too long and the putty hardened on me. Luckily they included an extra pack of putty for a 2nd attempt.

    Overall, I am satisfied with my purchase and will probably order a backup guard down the road as my dog seems to love these things.

  • Dillon Waters

    When my daughter’s night guard finally wore through, I tried Sentinel after reading the reviews. She mostly grinds her teeth during the day so after a conversation with the customer service, we went with the day guard. The process works a lot like how it would be handled at the dentist’s office but with fraction of the cost. They send you the impression kit, you send it back to them and within a week or so you receive the guard. The first time we sent the impression, the top wasn’t deep enough so they sent us another kit for her upper teeth. We gave it another go and it worked. The fit is very comfortable for my daughter and so far it seems sturdy. It’s a great alternative way to get your night guard for daytime and I highly recommend purchasing from Sentinel.

  • Jillian Mitchell

    I had been looking for something like this for quite a while. I clench my teeth so badly at work but I have to talk and smile during the day and didn’t want to wear anything that people can see. I chose the 1mm and it’s perfect! Thin and stays in place. Thank you!

  • Chasity Freeman

    I get bad headaches during the day from clenching my teeth. Been wearing the no show day guard for a week now. I wear it at work, at home, at the gym. So far it’s an excellent product! I forget I have it in and no one is the wiser! A+++
    Thank you!

    -Chasity Freeman

  • Brianda Jackson

    No better mouth guard out there! This is it. This company has it all. Excellent customer service, informative, fast, affordable and they make a great product. I tell all my co-workers, friends and family about Sentinel Mouthguards. I’ve been with them since 2012 and I’ll continue to be a lifelong customer. Great work guys!

Free Shipping

We ship your kit with everything you need from the molding trays and putty to the prepaid return packaging.

30 day guarantee

Try it out! If you’re not satisfied, you can always return the Mouthguard within 30 days for a full refund.

Save 20%

By entering coupon code "big spender", you save 20% on orders over $200.