3D Printer Adhesives

Glue is not "magic" — just a control over the first layer

In FDM printing, the first layer is the contract between the model and the bed: if it "grabs" evenly, the chance of a successful print jumps sharply; if it starts peeling at the corners, every next minute of printing is a risk. That's where 3D printer adhesives come in—as a thin, predictable interlayer that stabilizes adhesion and makes surface behavior more consistent between individual prints.

The glue helps in two ways. First, it increases the adhesion of first lines on difficult surfaces (e.g. glass or "fatigued" PEI). Second, in some combinations (notably PETG on smooth PEI/glass) it can work as a controllable release layer to avoid overly aggressive sticking and risk of plate damage on release.

When does it make sense to use glue?

Glue is mostly worth it when geometry and material "traps" you. Large, flat parts, long edges and sharp corners are classics for corner lift and warping. More heat-resistant shrink materials (such as ABS) like a stable first line and constant environment. And moisture-sensitive and "capricious" threads like nylon often require special attention — not only settings, but also the right adhesive to hold the part without deforming it.

There is also a more practical side: if you print often, the glue saves time from re-starts, re-levelling, experiments with the first layer and "hunting" for the right combination for the particular plate. In this sense, adhesives are one of the most effective 3D printing accessories — a small product that saves hours.

Spray, stick or pen: how to choose the feel and control

The spray is the choice for speed and even coverage. You get a thin film over a larger area, which is convenient for large models or when you want an even start on a series of prints. This is also a good option if you frequently change the position of the model on the plate and don't want to "paint" an area by hand.

The stick is about precision and economy. Apply only where the model is in contact with the bed, without excess coverage of the entire build plate. This is handy for small parts, many separate parts on one plate, or when you want to avoid overspray around the printer.

The pen type of adhesive is between the two worlds: it gives the accuracy of a stick, but often has a more "engineered" behavior - for example, different adhesion according to the temperature of the bed. This type of adhesive is practical when you are printing ABS, polycarbonate or long prints and want predictable release control on cooling.

And specialized formulas (for example, for nylon) are a separate category: instead of universality, they give maximum stability precisely for the difficult material.

Surfaces: glass, PEI, textured and flexible plates

Glass is the "clean canvas" — easy to clean and flat, but often needs help to hold the first layer steady. PEI is usually a strong performer on its own, but over time it gets dirty, polished, or just hits a material/temperature combination that isn't ideal. Texture plates provide mechanical adhesion, but in some models with a small contact area or at higher temperatures, additional adhesive is still useful.

Flexible plates add another variable: they are easy to peel off, but can be less forgiving of an inappropriate first layer, especially with heavier/taller prints. The glue here is a way to make the grip permanent and reduce surprises.

How to apply glue so as not to spoil the first layer

The most common mistake is overdoing it. A thick layer of glue can leave a texture on the first layer and require more frequent cleaning. Much more effective is a thin, even coating and periodic refreshing, instead of "flooding" the plate.

Start with a clean surface. Finger grease, dust and remnants of old adhesive layers make the adhesion unstable. When spraying, it is important to work at a suitable distance and not to stay in one place. For compact sprays, a light layer and good ventilation are often recommended. With a stick/pen, apply evenly and calmly to the model area, then let it "set" according to the type of product.

After the print, cooling is part of the process. With stick, for example, separation becomes easier when the temperature drops low enough (even around/below 30°C according to specific instructions), and with many adhesives, cooling helps the part release without excessive force.

Adhesives in this category and what they are best for

3DLAC spray 400 ml: the universal "workhorse"

This type of spray is practical when you are printing a variety of materials and want a fast, even film on the plate. In its description, the emphasis is on working with a wide range of materials, the absence of perfume, high temperature resistance and a reinforced fixing agent — that is, stability on a heated bed and long prints. It is suitable for everyday use when you are looking for predictability rather than "tricks" for one particular filament.

3DLAC MINI 75 ml: the compact spray for smaller projects and mobility

The mini format is handy if you want a spray but don't print huge runs or just prefer a smaller cut. The idea here is strong adhesion on heated platforms and compatibility with commonly used materials such as PLA, ABS and PETG, plus easy cleaning with water. The practical plus is the control: thin layer, short drying and separation after cooling, paying attention to the ventilation during application.

3DLAC PLUS 100 ml: convenient size and quick drying

The Plus variant is a spray in a practical bottle described as based on thermoplastic copolymers for FDM. Very fast drying, easy application and cleaning with water, as well as working with ABS/PLA/PETG are emphasized. A useful feature is that it can be used both on a heated table and without heating — that is, it gives flexibility with different printers and conditions. There are also important notes on storage and flammability, which is typical of aerosol/spray products.

3DLac Stick 80 ml: precise control and strong fixation

The stick is for those times when you want to apply glue just under the model and avoid excess coverage. Here the focus is on a high level of fixation, quick drying and working on multiple surfaces. A practical detail is the recommendation to wait for cooling before separation — so the risk of force "clamping" and surface injury is less, and separation becomes more controllable.

DimaFix Adhesive Pen: temperature-dependent adhesion and easy cleaning

DimaFix Pen is interesting when you want the adhesion to "follow" the temperature of the bed: lower when cold (easier separation) and higher when hot (stability for complex/long prints). The description emphasizes that it is gas-free, a greener approach as a format, easy to apply in one movement, water-soluble and multi-purpose. It has specific guidelines for use, including hints for a higher bed temperature when printing, making it a logical choice for materials like ABS and even polycarbonate on glass when you're looking for maximum predictability.

3DLAC 3D NYLON 30 ml: specialized glue for nylon filaments

Nylon is often a universe of its own: shrinkage, sensitivity to conditions, and the need for a firm grip. This product is positioned precisely for nylon filaments, with an emphasis on excellent adhesion and preventing distortion, improving precision and durability. A practical plus is the brush applicator, which allows for very precise and even application on a heated table — useful when working with smaller contact areas or wanting to limit the adhesive to a specific area only.

Cleaning, safety and plate life

Most problems attributed to "bad glue" are actually a combination of a dirty surface and build-up. If the product is water-soluble or washes off with water, that's a convenience—but it's still good to have a rhythm: periodic washing, drying, and another thin layer.

When spraying, think about the environment: apply with ventilation and keep electronics from direct spray. For flammable products - away from sources of heat/sparks and in a cool place, out of direct sunlight. These small habits protect not only the printer, but also the adhesion consistency.

Small fixes that work together with the glue

The glue is strong, but it's no substitute for a base setup. If the corners are raised, increase the width of the brim or add "mouse ears", check the ventilation of the first layers and the stability of the temperature in the room. With ABS, the combination of a closed volume (enclosure), stable temperature and a good first layer is a classic recipe. The glue here is the final stabilizer that makes the result repeatable.

If you're printing PETG on top of smooth PEI, a thin layer of glue can help not only with grip, but also with safer release after cooling. The goal is always one: control — at the beginning of the print and at its end.