gomagom-87-uv-adhesive

The Gomagom 87 Hi-Tech is a UV-curable photopolymer adhesive with a built-in UV flashlight right in the applicator: apply the liquid resin where you need to bond, take your time positioning the pieces (no rush — it won't cure until you're ready), shine the UV light for a few seconds, and the bond sets hard and strong. It works on the exact same physical principle as a UV resin 3D printer — and chemically, it's formulated with monomers from the HEMA/isobornyl acrylate/glycol methacrylate family, essentially the same chemistry as the Anycubic, Elegoo, and Phrozen resins we carry. This makes it the ideal tool for repairing UV resin 3D printed parts, with chemical adhesion that outperforms any cyanoacrylate.

How it works: the UV resin principle

Unlike cyanoacrylates (which cure through moisture in the air) and epoxy putties (which cure through a two-part chemical reaction), the Gomagom 87 cures by exposure to ultraviolet light. In liquid form, the adhesive's monomers remain completely stable — you can apply it, adjust positioning, clean up excess, reposition parts, all at your own pace. Only when you switch on the UV flashlight built into the tube and light hits the adhesive does the photoinitiator trigger polymerization: within seconds, the liquid resin becomes a solid, rigid polymer that locks the bond in place.

This is exactly the same principle used by UV resin 3D printers (SLA, MSLA, DLP). The difference is that here you're applying it to a single joint with a pocket-sized light source, rather than curing an entire part inside a machine.

Why it's the best adhesive for UV resin printed parts

The Gomagom 87 formula includes polyacrylate, glycol methacrylate, isobornyl acrylate, 2-hydroxypropyl methacrylate, and a photoinitiator — monomers and oligomers from the UV-curable acrylate and methacrylate family. The UV resins we carry at Mr Resin — Anycubic, Elegoo, and other brands — are formulated with this same chemistry, with variations depending on the manufacturer.

For SLA makers, this has one very important practical implication: when you apply Gomagom 87 to a properly cured UV resin print, the two materials are chemically compatible. The bond isn't a surface-level "gluing" like cyanoacrylate produces — it's a true chemical integration between two polymers from the same family. The resulting mechanical strength is significantly greater than what you'd get from a cyanoacrylate on the same material.

If a resin print comes off the build plate with a delaminated layer, an internal crack, or a fracture from poor layer adhesion, the Gomagom 87 can effectively "weld" it by filling the problem area with a chemically compatible resin and curing it with UV light — leaving the part looking and performing as if it had printed correctly in the first place.

Use cases in 3D printing

Repairing delaminated layers in SLA prints. Apply the adhesive into the gap between layers, cure with the UV flashlight for 10–20 seconds per side, and the part is structurally repaired with a chemically compatible material.

Filling porous or under-cured areas. These are common SLA print defects where a section hasn't cured properly or shows porosity. Apply resin, smooth it with a toothpick, then cure with UV. Once cured, the area can be sanded, painted, and primed just like the rest of the print.

Assembling multi-part resin prints. The key advantage over cyanoacrylate: you have time to adjust the fit. With complex multi-part assemblies, the fast grab of CA glue can lead to misaligned joints. With UV adhesive, you position, adjust, clean up excess, and only cure when you're satisfied. Important: light must reach the adhesive to cure — if both surfaces are fully opaque and the joint is completely sealed with no side access, the interior won't cure. In those cases, apply in layers or use cyanoacrylate for that specific joint.

Bonding printed parts to transparent materials. Glass, acrylic, polycarbonate. The adhesive's clarity and the ability to cure through a transparent substrate delivers clean, aesthetically pleasing results that are difficult to achieve with cyanoacrylate.

Repairing fine cracks in FDM prints. While chemical affinity isn't as strong as with UV resin parts, Gomagom 87 also bonds well to PLA, PETG, and ABS — with the added benefit of a stress-free working time.

Use cases in scale modeling, jewelry making, and repairs

Jewelry and costume jewelry. Repairing settings, securing transparent stones (light cures through the crystal), reconstructing broken elements. The clarity of the cured adhesive and the controlled working time make it ideal for detail-critical work where aesthetics matter.

Eyeglass frame repair. One of the most classic consumer uses for UV adhesive (the packaging itself shows a pair of glasses). The amount of adhesive you can apply and the rigidity after curing allow for discreet, durable repairs to temples, bridges, and hinges.

Small household repairs. When cyanoacrylate won't hold because the joint vibrates, gets wet, or needs a slightly thicker adhesive layer, UV adhesive creates a more resilient chemical bond. Seals minor leaks, fills cracks in ceramics, repairs transparent plastics.

Creative crafts and resin art. For securing elements onto epoxy resin surfaces, adding dimensional details to resin jewelry, or creating bridges and connections in mixed-media pieces.

How to use it

Application procedure per the manufacturer:

1. Apply resin to the desired area. Surfaces must be clean, dry, and grease-free. On UV resin prints, we recommend a quick wipe-down with isopropyl alcohol beforehand to remove any uncured monomer residue.

2. Join the pieces and hold them in position. No rush — the resin won't set until you activate it with UV light. Use this time to fine-tune alignment, remove excess adhesive, and make sure both parts fit exactly the way you want.

3. Expose to the built-in UV flashlight for a few seconds. The UV light is built into the tube cap — just uncap and switch it on. Make sure to illuminate the entire area where adhesive was applied. Cure time is nearly instant (5–15 seconds depending on the volume applied).

Key to success: UV light must reach the adhesive. If you're bonding two fully opaque surfaces in full contact, adhesive trapped between them won't cure no matter how long you shine light from the outside. Solutions:

• Apply in layers: apply a thin coat, cure, add more, cure, repeat.
• Apply to the edge of the joint where light can reach, let it wick inward via capillary action, then cure.
• If one of the surfaces is transparent or translucent, cure from that side.
• For fully opaque joints with no light access, consider using a cyanoacrylate — for example Gomagom 9 with its brush applicator for small parts, or Gomagom 7 for general bonding.

Once cured, the resin can be sanded, drilled, filed, and painted just like any other rigid plastic.

Compatible and incompatible materials

Compatible per manufacturer: metal, wood, ceramic, glass, plastic (including 3D printing plastics such as PLA, PETG, ABS, and especially UV resin due to chemical affinity), porcelain, acrylic.

NOT compatible (as stated on packaging): polyethylene, polypropylene, silicone, Teflon®. These materials have too low a surface energy for any adhesive, including UV adhesives, to form a reliable bond.

When to choose Gomagom 87 vs cyanoacrylate or epoxy putty

We carry several adhesive options in the Gomagom lineup, each suited to different situations:

• Gomagom 87 (UV resin adhesive, 4g with UV light): repairing UV resin prints (superior chemical compatibility), bonds that require repositioning before curing, applications where one surface is transparent, eyeglass repair, jewelry with transparent stones.
• Liquid super glue (Gomagom 7 / 9 / 2): fast bonding on opaque surfaces, small part assembly, everyday household use. Lower cost per gram and more than sufficient for most common tasks.
• Gomagom 37 gel super glue: vertical surfaces, porous materials, situations where liquid CA glue fails but you don't need the strength of UV adhesive.
• Gomagom 31 / 29 epoxy putty: when you need to fill gaps and rebuild volume, not just bond two surfaces together.

Technical specifications

• Type: light-cure UV resin adhesive
• Composition: polyacrylate, glycol methacrylate, isobornyl acrylate, 2-hydroxypropyl methacrylate, photoinitiator
• Net content: 4 g
• Format: applicator tube with built-in UV flashlight in the cap
• Appearance: transparent when cured
• Cure time: seconds under UV light (5–15 seconds depending on volume)
• Open time: indefinite without UV light exposure (work at your own pace)
• Finish: sandable, drillable, and paintable once cured
• Water resistance: yes, once fully cured
• Flexibility: rigid with slight flexibility (not fully brittle)
• 3D printing compatibility: excellent on cured UV resin parts (chemical affinity), good on PLA, PETG, and ABS
• Other materials: metal, wood, ceramic, glass, porcelain, acrylic
• NOT compatible with: polyethylene, polypropylene, silicone, Teflon®
• Important: UV light must reach the adhesive to cure — it will not cure blind inside fully opaque sealed joints
• Manufacturer: DUNSA (Gomagom brand, Spain)
• Reference: SKU GG15561

Why buy it from Mr Resin

If you work with UV resin 3D printing (Anycubic, Elegoo, and other brands we carry), Gomagom 87 is arguably the most useful adhesive in our entire catalog. The chemical affinity between the adhesive's resin and the resin in your printed parts means repairs become structurally integrated — not just glued on top. It's the right tool when a large print comes out with a defect and you want to save it without running the whole job again.

Compared to other consumer UV adhesives on the market (Loctite UV Smart Glue, Bondic, Glue Masters), Gomagom 87 delivers the same technology at a significantly lower price — with the added bonus of a built-in UV light right in the cap, so you don't need to buy one separately.

If you're already placing an order for resin, filament, or paint, adding the 87 ships in the same package at no extra cost. Free shipping to mainland Spain on orders over €79.

Frequently Asked Questions

Is it truly chemically compatible with Anycubic and Elegoo resins?
Gomagom 87's formulation (polyacrylate, glycol methacrylate, isobornyl acrylate, 2-hydroxypropyl methacrylate, photoinitiator) belongs to the same chemical family of UV-curable monomers and oligomers used in 3D printing resins by most manufacturers, with variations depending on brand and product line. In practice, this means adhesion to cured UV resin prints is significantly stronger than any cyanoacrylate. For a safe test: apply a small amount of adhesive to a hidden area on a scrap print, cure with UV for 15 seconds, and check the mechanical bond. The result is noticeably stronger than with other adhesives.

Do I need to buy a separate UV flashlight?
No. The UV light is built right into the cap of the tube. Just remove it, switch it on, and you're ready to go. It runs on included button cell batteries. The wavelength and intensity are optimized to cure the adhesive in seconds.

Why doesn't it cure completely on internal joints?
Because UV light can't reach the adhesive. The photoinitiator needs to absorb light to trigger polymerization — if the adhesive is "trapped" between two completely opaque surfaces, light from the outside won't penetrate, leaving that area uncured. Solutions: apply in thin layers and cure between each coat, or ensure at least one surface is transparent or translucent so light can pass through. If the joint is fully opaque with no light access, a cyanoacrylate is the better choice.

Can I use it to repair delaminated layers on SLA prints?
Yes, this is one of its best use cases. The chemical affinity with the print's own resin creates a structural bond — not just surface adhesion. How to do it: gently separate the layers if possible to access the crack, clean with isopropyl alcohol, apply the adhesive inside the crack, press the layers together, then cure with UV light from the outside for 15–20 seconds per side. For deep internal cracks where light can't reach directly, you may need to work in multiple passes from different angles.

Is this the same as the liquid resin in my 3D printer?
Chemically they belong to the same family (UV-curable acrylates and methacrylates), but each is formulated for a specific purpose. Printing resin is optimized for flowability, pigmentation, layer-by-layer printing properties, and the final part's mechanical strength. This adhesive is optimized for application viscosity (gel-like, won't run), bonding to multiple substrates, and joint strength. Do NOT use one as a substitute for the other: printer resin applied to a joint won't cure properly with a pocket UV light (it needs much higher intensity), and using this adhesive in your printer will damage the machine.

How long does the adhesive last once opened?
In the absence of direct UV light (sunlight, UV-emitting fluorescent bulbs, UV LEDs), the adhesive stays stable for a long time inside the sealed tube. Store in a cool, dry place away from direct sunlight. If you notice crystallization forming inside the tube or the adhesive becoming less fluid, this indicates unintended UV exposure — time to replace it.

Is it safe for skin contact? Do I need gloves?
The formula contains acrylates and methacrylates, which may cause skin irritation and allergic reactions in sensitive individuals. For occasional, one-off use it's not strictly necessary, but if you're planning an extended repair session, we recommend disposable nitrile gloves. Important note: the UV flashlight is low-intensity, but you should still avoid prolonged direct exposure to your eyes.