How often?
One pack is 14 treatments — one upper and one lower strip each. Go fast, steady or slow.
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7 days
Fast track
Two treatments a day — the full pack in a week.
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14 days
The classic
One upper + one lower strip a day.
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28 days
The slow way
One treatment every other day.
Want to keep going? Grab a second box.
Before your first strip.
Long → upper
the longer strip goes on your top teeth
Short → lower
the shorter one goes on your bottom teeth
✳︎ the little notch marks the middle — line it up between your two front teeth
- Store it dryin a dry place below 20°C
- Don't swallowlet it melt, then just carry on
- Mind your eyesif a strip touches them, rinse with water
- Irritated?stop using and give your mouth a break
Not for you if you're under 16, pregnant or breastfeeding, have dental or gum problems, or are allergic to any of the ingredients. Wait two weeks after dental treatment such as crowns, fillings or implants, and don't use the strips while wearing braces.
no trays, no rinsing ✳︎Quick questions
the ones we get most
Once a day for 14 days, or every other day for 28 days. In a hurry? Twice a day finishes the course in 7 days. Each session uses two strips — the long one on your upper teeth, the short one on your lower teeth.
Not at all. Every other day is one of the ways to use FLASH, so just pick up where you left off.
No. The strip dissolves completely in under 10 minutes — no trays, no rinsing, nothing to remove.
One pack of 28 strips is one full course of 14 sessions. Go at your pace: twice a day finishes the course in 7 days, once a day in 14. Based on clinical and laboratory testing; individual results may vary.
FLASH is designed to be gentle — but if you notice irritation, pain or excessive sensitivity, stop using the strips.
Wait two weeks after dental treatment such as crowns, fillings or implants. Don't use the strips while wearing dental braces.
FLASH isn't suitable if you're under 16, pregnant or breastfeeding. Don't use it if you have dental or gum problems or are allergic to any of the ingredients.
Aqua, Polyvinylpyrrolidone, Glycerin, Pectin, Phthalimidoperoxycaproic Acid (PAP), Mentha Piperita (Peppermint) Oil, Menthol, Hydroxyapatite, Sodium Hexametaphosphate, Sucralose, Polysorbate 40, Cocos Nucifera (Coconut) Oil, Sodium Chloride.
Gluten free and vegan friendly.