| Compatible Sensors | Dexcom G6/G7, Libre 2/3, Medtronic Guardian |
| Typical Extra Wear | 3β14 days depending on brand |
| Waterproof Options | Available (polyurethane-based brands) |
| Skin-Safe Options | Hypoallergenic, latex-free available |
| Application Method | Peel-and-stick, pre-cut or cut-to-fit |
Key Takeaways
- Overpatches extend CGM sensor wear time by 3β14 extra days
- Skin-friendly adhesives matter most for sensitive or active users
- Shape, breathability, and waterproofing vary significantly by brand
- MDS Diabetes stocks the most popular overpatch brands in Australia
What Is a CGM Overpatch?
A CGM overpatch is an adhesive patch applied over a continuous glucose monitor (CGM) sensor β such as a Dexcom G6/G7, FreeStyle Libre 2/3, or Medtronic Guardian β to reinforce adhesion. They are particularly useful for active individuals, swimmers, and those who sweat heavily or have sensitive skin reactions to original sensor adhesives.
Top CGM Overpatch Brands Compared
| Brand | Material | Waterproof | Skin-Friendly | Shapes Available | Avg. Hold (Extra Days) |
|---|---|---|---|---|---|
| Skin Tac / Simpatch | Polyurethane | Yes | Moderate | Dexcom, Libre | 7β10 |
| Kinesiology Tape (KT) | Cotton/Elastane | Partial | High | Cut to fit | 3β5 |
| Dexcom Overtape | Polyurethane | Yes | High | G6/G7 specific | 7β14 |
| Omnipod Patch | Medical foam | Yes | Moderate | Pod-specific | 3 |
| GrifGrips | Polyurethane | Yes | High | Many CGM models | 7β10 |
Which Brand Holds Best?
Best Overall Adhesion: Dexcom Overtape
Designed specifically for Dexcom sensors, this overtape offers the most reliable hold β up to 14 days β in water, sweat, and heat. Its pre-cut shape fits perfectly without covering the transmitter window, making it the gold standard for Dexcom users.
Best for Sensitive Skin: GrifGrips
GrifGrips use a hypoallergenic polyurethane film that breathes well, reducing moisture build-up under the patch. They come in fun designs and are suitable for children and adults with contact dermatitis or latex sensitivities.
Best Budget Option: Kinesiology Tape
KT tape is affordable and highly breathable. While it doesn't offer the same waterproof performance, it's gentle on skin and can be cut to any shape. Ideal for light activity or users who simply need a few extra days of hold.
Key Factors When Choosing an Overpatch
- Sensor compatibility: Always check the patch is cut for your specific CGM model
- Waterproofing: Swimmers and high-sweat users need full polyurethane waterproof options
- Skin sensitivity: Look for hypoallergenic, latex-free formulas
- Breathability: Non-breathable patches trap moisture and can cause skin breakdown
- Wear duration: Match overpatch lifespan to your sensor's approved wear time
Application Tips for Maximum Hold
- Clean and dry skin thoroughly before applying the sensor and overpatch
- Use a skin prep wipe or barrier film (such as Skin Tac) underneath for extra grip
- Apply the overpatch 15β30 minutes after sensor insertion once initial adhesive sets
- Press firmly from the centre outward to remove air bubbles
- Avoid applying lotions, sunscreen, or oils near the sensor site
Where to Buy CGM Overpatches in Australia
MDS Diabetes (mdsdiabetes.com) stocks a curated range of CGM overpatches compatible with Dexcom G6, G7, FreeStyle Libre 2 and 3, and Medtronic Guardian sensors. All products are sourced from trusted medical-grade suppliers and shipped Australia-wide.