Vein Glue Treatment: What It Is and How It Works

Vein glue treatment is one of the newer options doctors can offer for closing diseased veins in the leg, and it works in a fundamentally different way to the heat-based and chemical treatments that came before it. Rather than burning a vein shut or irritating it with a chemical solution, vein glue treatment uses a medical-grade adhesive, delivered through a thin catheter, to physically seal the vein walls together. Once sealed, blood simply reroutes through healthy veins nearby, and the treated vein is gradually reabsorbed by the body over time. At Melbourne Leg Vein Centre, this treatment is offered under the brand name VenaSeal, and it sits alongside five other non-surgical options our doctors use depending on each patient's individual vein pattern.

This article walks through what vein glue actually is, how it works mechanically, and why a doctor might choose it over heat-based ablation or sclerotherapy.

What Is Vein Glue, Exactly?

"Vein glue" is the plain-English name for a medical cyanoacrylate adhesive, most commonly known in Australia under the brand VenaSeal. Cyanoacrylate itself is not a new or exotic chemical family. Related adhesives have been used in surgery for wound closure and other applications for decades before anyone adapted the technology specifically for treating varicose veins.

In a vein glue procedure, a doctor uses ultrasound imaging to guide a thin catheter into the diseased vein, most often the great saphenous vein running along the inner thigh and calf. Small, measured amounts of adhesive are released as the catheter is withdrawn along the length of the vein, with gentle external pressure applied to bring the vein walls into contact so the glue can bond them together. The vein is permanently closed off. Blood that used to pool or flow backward through that faulty vein is rerouted through the network of healthy veins that remain, and the sealed vein is gradually broken down and absorbed by the body over the following months.

Vein glue is generally used for the larger, deeper "source" veins that feed visible varicose veins, such as the great or small saphenous vein, rather than for the fine surface spider veins or reticular veins many people also want treated. Those smaller vessels are more commonly managed with surface sclerotherapy or surface laser vein treatment.

How Vein Glue Differs From Heat-Based Ablation (RFA and EVLA)

Radiofrequency ablation (RFA) and endovenous laser ablation (EVLA) are the two main heat-based treatments MLVC offers, and conceptually they work toward the same end point as vein glue: closing off a diseased vein so blood reroutes elsewhere. The difference is entirely in the mechanism.

RFA and EVLA both use thermal energy, delivered through a catheter positioned inside the vein, to heat the vein wall until it collapses and seals shut. Because heat is involved, these procedures typically require tumescent local anaesthetic, a series of small injections of anaesthetic fluid around the vein along its length, both to numb the area and to protect surrounding tissue from the heat. This is a wellestablished and effective approach, and healthdirect Australia notes that endovenous ablation techniques using laser or radiofrequency energy are commonly used to treat larger varicose veins in Australia.

Vein glue is a non-thermal treatment. It closes the vein through an adhesive bond rather than heat, which means it generally does not require the same series of tumescent anaesthetic injections along the leg. For some patients this translates to a more comfortable procedure with less bruising in the treated area, since there's no thermal injury to surrounding tissue to manage. It's a genuine mechanical difference worth understanding, though the practical experience still varies from patient to patient and vein to vein, which is exactly why an individual assessment matters.

How Vein Glue Differs From Sclerotherapy

Sclerotherapy, whether surface sclerotherapy for smaller veins or ultrasound-guided sclerotherapy for larger or deeper ones, works through a different mechanism again. A chemical irritant solution is injected directly into the vein, damaging the inner lining so the vein walls stick together, scar down, and are eventually reabsorbed. It's a chemical process rather than a thermal or adhesive one.

Under Medicare, sclerotherapy for injecting veins over 2.5mm in diameter is covered under item 32500, subject to a maximum of six treatments in any 12-month period. Veins under 2.5mm in diameter don't qualify for this rebate and attract GST. Vein glue, by contrast, is generally positioned for larger, straighter source veins rather than the smaller surface veins sclerotherapy handles well, so the two treatments tend to suit different parts of the venous system rather than compete directly for the same job.

Practical Differences Doctors and Patients Weigh Up

When a doctor is deciding between vein glue and a heat-based option like RFA or EVLA for a suitable vein, a few practical factors typically come into the conversation.

• Anaesthetic requirements – Because vein glue doesn't rely on heat, it generally avoids the multiple tumescent anaesthetic injections along the leg that heat-based methods often require. Some patients find this makes for a more comfortable appointment.

• Compression stockings – Heat-based treatments commonly involve a period of wearing compression stockings afterward to support the vein and reduce bruising and swelling. Some vein glue protocols don't require compression stockings in the same way, though this varies by clinic, by vein, and by the individual patient's needs, so it should never be treated as an absolute rule. Your doctor will advise what's appropriate for your specific case.

• Return to activity – Because there's no significant thermal injury to surrounding tissue and often less need for compression, many patients find they're comfortable resuming normal daily activities quite quickly after vein glue treatment, though as with any procedure this varies from person to person.

• A permanent implant – Unlike heat or chemical closure, vein glue leaves a small amount of adhesive material sealed inside the treated vein permanently, as the body's own tissue scars around it. This isn't a safety concern in itself, but it's a structurally different outcome to a vein that's been closed by heat or chemical scarring, and it's part of what a doctor weighs when discussing options with a patient.

Who Tends to Be a Suitable Candidate for Vein Glue

Vein glue treatment tends to suit patients with larger, relatively straight superficial veins, most typically the great saphenous vein, where a catheter can travel a fairly direct path along the vein's length. It's generally not the right tool for very small, tortuous, or highly branching veins, and it isn't used for fine spider veins or telangiectasia, which respond well to surface treatments instead.

Suitability also depends on broader factors a doctor needs to assess directly: the size and pattern of venous reflux, any history of sensitivity to adhesives, and the overall pattern of varicose and related veins in the leg. Two people with visually similar varicose veins can have quite different underlying vein anatomy, and that's precisely why MLVC's doctors assess each patient individually, using clinical examination and, where needed, ultrasound imaging, before recommending vein glue over RFA, EVLA, or sclerotherapy.

General Safety Profile

Vein glue treatment has an established safety record, but like any medical procedure it carries some general risks that a doctor will discuss as part of your consultation. Because the treatment involves a cyanoacrylate adhesive, a known consideration is the small possibility of an allergic-type or inflammatory reaction to the material in some patients. This is understood as a rare occurrence rather than a common one, though the exact likelihood varies between individuals. Other general risks associated with vein closure procedures, shared to varying degrees across RFA, EVLA, and vein glue, can include localised bruising, discomfort along the treated vein, and, rarely, more serious complications such as blood clots. Medtronic, the manufacturer of the VenaSeal system, reports closure rates around 94.6 percent at five years in its published clinical data, which gives a general sense of how durable the treatment can be, though individual results are never guaranteed and outcomes depend on the specific vein being treated.

As with any of MLVC's six leg vein treatments, the right choice depends on an assessment by one of our doctors, not a generic recommendation.

Do You Need a Referral?

No GP referral is needed to book a consultation with our doctors about vein glue or any other leg vein treatment. A referral only becomes relevant if a detailed vein-mapping ultrasound scan is required and you want to claim a Medicare rebate on that specific scan. Otherwise, you're welcome to book directly.

Frequently Asked Questions:

Is vein glue treatment painful?

Most patients describe vein glue treatment as involving mild discomfort at most, generally similar to or less than heat-based options, partly because it typically avoids the series of tumescent anaesthetic injections used with RFA and EVLA. Individual experience varies, and your doctor can talk through what to expect for your specific veins.

How is vein glue different from laser or radiofrequency vein treatment?

The core difference is the mechanism used to close the vein. Vein glue uses a medical adhesive delivered through a catheter to physically seal the vein walls together, while laser (EVLA) and radiofrequency ablation (RFA) use heat to achieve vein closure. Vein glue is considered a non-thermal treatment, which is why it's often discussed as an alternative to heat-based methods for suitable veins.

Do I need to wear compression stockings after vein glue treatment?

This varies by protocol and by patient. Some vein glue procedures don't require compression stockings in the way heat-based treatments often do, but this isn't an absolute rule, and your doctor will advise on aftercare specific to your treatment and vein pattern

Is vein glue treatment covered by Medicare?

Medicare rebates for leg vein treatments depend on the specific procedure and vein size. Sclerotherapy for veins over 2.5mm is covered under Medicare item 32500, capped at six treatments in a 12-month period, while veins under 2.5mm don't qualify and attract GST. Larger varicose veins treated with radiofrequency ablation or laser may claim separate Medicare item numbers, though significant out-of-pocket costs typically remain, and the Medicare Safety Net may reduce these once the annual threshold is reached. Speak with our team or check our fees page for guidance specific to vein glue treatment.

Am I a good candidate for vein glue treatment?

Vein glue tends to suit larger, relatively straight superficial veins such as the great saphenous vein. It isn't generally used for fine spider veins, and suitability always depends on an individual assessment by one of our doctors, since vein anatomy and the pattern of reflux differ from person to person.

Is vein glue treatment permanent?

The treated vein is sealed shut and gradually absorbed by the body, and it isn't expected to reopen. That said, no varicose vein treatment prevents new veins from developing elsewhere in the leg over time, so ongoing monitoring is a normal part of long-term vein health regardless of which treatment you choose.

Conclusion

Vein glue treatment offers a genuinely different approach to closing diseased leg veins, using a medical adhesive rather than heat or chemical irritation, and for the right patient it can mean a more comfortable procedure with fewer anaesthetic injections along the leg. It isn't a replacement for RFA, EVLA, or sclerotherapy across the board, but rather another tool in the kit that suits particular vein patterns, particularly larger, straighter superficial veins like the great saphenous vein. Whether vein glue treatment, heat-based ablation, or sclerotherapy is the right fit for you depends entirely on your individual veins, which is why MLVC's doctors assess every patient before recommending a path forward