Skin Tac vs IV Prep: Which CGM Adhesive Works Better?

The CGM Adhesive Dilemma

Continuous glucose monitors have transformed diabetes management, but one persistent challenge remains: keeping sensors firmly attached to your skin for their full wear period. Whether you swim, sweat heavily, or simply have sensitive skin, a lifting sensor can mean lost data and wasted money. Two of the most popular adhesive aids on the market are Skin Tac and IV Prep — but which one actually works better?

What Is Skin Tac?

Skin Tac is a liquid adhesive barrier wipe made by Torbot Group. It contains a tackifier that creates a sticky layer on top of your skin before you apply your CGM sensor. Beyond improving adhesion, Skin Tac also acts as a skin protectant, forming a barrier that can reduce irritation from adhesive patches.

• Application: Wipe the solution onto clean, dry skin and let it dry until slightly tacky before placing your sensor.
• Texture: Leaves a noticeably sticky residue that bonds powerfully with sensor adhesive.
• Removal: Requires Skin Tac remover wipes or an oil-based product for clean removal without skin trauma.
• Best for: Athletes, swimmers, and people who sweat heavily or struggle with sensors falling off prematurely.

What Is IV Prep?

IV Prep wipes, originally designed to prep skin before IV insertions in clinical settings, are a common go-to for CGM users. These wipes typically contain isopropyl alcohol along with a skin toughener that leaves a thin, tacky film on the skin surface.

• Application: Wipe over clean skin and allow to fully dry before sensor placement.
• Texture: Leaves a lighter, less aggressive tack compared to Skin Tac.
• Removal: Generally easier to remove with normal adhesive remover wipes.
• Best for: Everyday users who need moderate adhesion improvement without heavy-duty stickiness.

Head-to-Head Comparison

When it comes to adhesion strength, Skin Tac wins by a clear margin. Users report sensors lasting their full wear period — even through multiple showers and workouts — with Skin Tac that might otherwise peel with IV Prep alone. However, IV Prep holds its own for people with milder adhesion issues or sensitive skin that reacts poorly to stronger tackifiers.

For skin sensitivity, IV Prep may be the gentler option since it cleans and preps the skin simultaneously without leaving as heavy a residue. Skin Tac can cause reactions in people with very sensitive skin, so a patch test is always recommended before committing.

In terms of ease of use, both products come in convenient single-use wipe packets that are easy to carry and use on the go. Skin Tac also comes in a bottle with applicator wand for those who prefer a more precise application.

When considering cost and value, IV Prep wipes tend to be slightly less expensive, while Skin Tac commands a higher price point — often justified by its stronger hold for active users.

Can You Use Both Together?

Absolutely — and many experienced CGM users do exactly that. A common technique is to use an IV Prep wipe first to clean and lightly prep the skin, then follow with Skin Tac for maximum adhesion. This layered approach can be especially useful for extended outdoor activities or travel.

Where to Find These Products

Both Skin Tac and IV Prep wipes are available through diabetes specialty retailers. If you're looking for a trusted source for CGM accessories including adhesive aids, overlays, and other supplies, mdsdiabetes.com carries a wide selection of products to support your CGM routine and keep your sensor secure throughout its wear period.

The Bottom Line

Both Skin Tac and IV Prep serve valuable roles in the CGM user's toolkit. If you need maximum hold and don't have sensitive skin, Skin Tac is likely your best bet. If you prefer a lighter touch or are new to adhesive aids, IV Prep is a great starting point. When in doubt, try both — your skin and your lifestyle will tell you which one wins for you personally.