Mastisol liquid adhesive is applied directly to clean, dry skin to create a tacky layer that helps dressings, tapes, and wound closure strips stay in place far longer than they would on their own. It’s a straightforward process: apply a thin coat, wait 20 to 30 seconds for it to become tacky, then press your dressing or strip into place. The details below will help you get a reliable hold every time and avoid common mistakes.
Preparing the Skin
Mastisol bonds best to skin that is clean, dry, and free of oils or lotions. Wash the area with mild soap and water and pat it completely dry before you start. Any moisture left on the skin will weaken the bond and shorten the life of your dressing.
If you’re using Mastisol around a vascular access site or another area that requires antiseptic prep, apply the antiseptic first and let it dry fully. Mastisol is compatible with chlorhexidine-based skin preps commonly used for IV dressings. Apply the adhesive around the outer perimeter of where your dressing will sit, not directly over the insertion site itself.
Applying Mastisol Step by Step
Mastisol comes in single-use ampules and multi-use bottles with applicator tips. For single-use ampules, snap the top off and squeeze gently to dispense the liquid. For bottles, use the built-in applicator or a cotton-tipped swab.
Paint a thin, even layer of Mastisol onto the skin where the edges of your dressing or tape will make contact. You don’t need to coat the entire area under the dressing. Focus on the border zone where adhesion matters most. A little goes a long way; a thick layer won’t dry properly and can actually reduce the hold.
Once applied, wait 20 to 30 seconds. The liquid will transition from wet and shiny to slightly tacky. This tackiness is your signal. Press your dressing, surgical strip, or tape firmly onto the treated skin. Hold gentle pressure for a few seconds to ensure full contact. The bond strengthens over the next minute or two as the adhesive fully sets.
Where to Apply It (and Where Not To)
Mastisol works well under transparent film dressings, surgical tapes, wound closure strips (like Steri-Strips), ostomy appliance borders, and securement devices for IV lines or glucose monitors. It’s particularly useful in high-movement or high-moisture areas like the neck, joints, or abdomen where dressings tend to peel.
Do not apply Mastisol directly into open wounds or onto broken skin. It is meant for intact skin only. Avoid contact with mucous membranes and keep it away from the eyes. The adhesive contains plant-derived resins, including gum mastic and styrax (both tree sap extracts), which can cause irritation on damaged tissue.
Why Mastisol Holds Better Than Alternatives
If you’ve used tincture of benzoin before, Mastisol is a significant upgrade. Comparative studies show it provides 7 to 8 times stronger adhesion than compound tincture of benzoin, with lower rates of allergic skin reactions and less skin discoloration. Benzoin products are cheaper, but they have inferior adhesive strength and a notably higher risk of contact dermatitis, especially with repeated use.
Mastisol is latex-free, which makes it suitable for people with latex allergies. That said, some cross-reactivity has been reported in rare cases, likely because of shared protein structures between latex allergens and the plant-based resins in Mastisol. If you have a known allergy to balsam of Peru, tree resins, or methyl salicylate, do a small patch test on your inner forearm before applying it to a larger area. True allergic reactions to Mastisol are uncommon, but they can cause blistering or red, itchy patches that look like contact dermatitis.
Removing Mastisol Safely
Mastisol creates a strong bond, so peeling a dressing off without help can damage fragile skin. This is especially important for elderly patients, people on blood thinners, or anyone with thin or compromised skin. Using a dedicated adhesive remover reduces the risk of what clinicians call medical adhesive-related skin injury: tearing, blistering, or stripping of the outer skin layer during removal.
Detachol is the adhesive remover specifically designed to dissolve Mastisol. To use it, saturate the corner of the dressing or tape with Detachol and gently lift the edge. Continue applying the remover as you slowly peel the dressing back, letting the solvent work ahead of your fingers. Never yank the dressing off in one motion. Once the dressing is off, clean the area with mild soap and water to remove any remaining adhesive residue before reapplying a fresh dressing.
If you don’t have Detachol on hand, baby oil or mineral oil can soften Mastisol enough to reduce the pulling force during removal, though they work more slowly and require more patience.
Tips for a Longer-Lasting Hold
Reapplication is sometimes necessary for dressings that stay on for several days. If you notice edges starting to curl, you can lift just the loose portion, dab a small amount of Mastisol underneath, wait for tackiness, and press the edge back down. This extends the life of the dressing without a full change.
In humid environments or on patients who sweat heavily, applying a skin prep wipe before Mastisol can improve results. The prep wipe creates a moisture barrier on the skin’s surface, giving the adhesive a drier foundation to bond to. Let each layer dry fully before adding the next: skin prep first, then Mastisol, then the dressing.
Store Mastisol at room temperature and keep the cap tightly sealed on multi-use bottles. The solvent in the formula evaporates quickly, which is what makes it dry fast on skin but also means an open bottle will thicken over time if not sealed properly.