{"product_id":"masilla-epoxi-gomagom-29-28g","title":"Universal Epoxy Putty GomaGom 29 28g | Cures Underwater","description":"\u003cp\u003eGomaGom Universal Epoxy Putty 29 is a two-part epoxy putty in a 28 g stick format, packaged in a sealed airtight container. Two features make it particularly useful for 3D printing workshops and household repairs: it \u003cstrong\u003ecures underwater\u003c\/strong\u003e and offers a \u003cstrong\u003e12–15 minute working time\u003c\/strong\u003e after kneading — enough margin to position the putty correctly before it begins to set. Once cured, it dries white, and can be sanded, painted, and varnished. It bonds to 3D-printed parts (PLA, PETG, ABS, UV resin), stone, metal, wood, ceramic, porcelain, glass, and most plastics (except polyethylene, polypropylene, and PTFE).\u003c\/p\u003e\n\n\u003ch2\u003eCures Underwater: The Key Differentiator\u003c\/h2\u003e\n\u003cp\u003eThis is GomaGom 29's standout property and the main reason it makes sense alongside the \u003ca href=\"\/en\/products\/masilla-epoxi-gomagom-31-30g\"\u003eGomaGom 31\u003c\/a\u003e. The 29 cures properly even when the surface is wet or submerged — opening up use cases that a standard adhesive simply can't handle:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRepairing 3D-printed parts that will be in contact with water.\u003c\/strong\u003e Vases, plant pots, bathroom accessories, filter components, and aquarium hardware. If a part needs a seal that holds up to permanent moisture exposure, the 29 is the right choice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSealing leaks in pipes and radiators.\u003c\/strong\u003e The manufacturer's own packaging highlights these as typical use cases. Small leaks, weeping joints, mildly corroded elbows — the 29 seals even when the surface is damp at the time of application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRepairing porcelain and ceramic kitchenware and bathroom fixtures.\u003c\/strong\u003e Teapot and cup handles, vases, chipped sinks. Its water resistance after curing and white finish make repairs nearly invisible on light-colored pieces.\u003c\/p\u003e\n\n\u003ch2\u003eComfortable Working Time: 12–15 Minutes\u003c\/h2\u003e\n\u003cp\u003eThis is the other differentiator compared to the \u003ca href=\"\/en\/products\/masilla-epoxi-gomagom-31-30g\"\u003eGomaGom 31\u003c\/a\u003e. While the 31 sets in around 10 minutes (ideal for quick repairs), the 29 gives you 12–15 minutes of open working time after kneading before hardening begins — and another 15–20 minutes until it's fully rigid.\u003c\/p\u003e\n\u003cp\u003eThis isn't the \"hours of open time\" you'd get from professional sculpting putties like Green Stuff or Milliput; it's still a fast-setting repair putty. But the extra margin makes a real difference when:\u003c\/p\u003e\n\u003cp\u003e- You need to \u003cstrong\u003eposition the putty precisely\u003c\/strong\u003e in a hard-to-reach area (inside a joint, a crack near fine surface details).\u003c\/p\u003e\n\u003cp\u003e- The repair involves \u003cstrong\u003eseveral steps in sequence\u003c\/strong\u003e (filling, smoothing, shaping, correcting).\u003c\/p\u003e\n\u003cp\u003e- You're applying putty to \u003cstrong\u003emultiple points on a large part\u003c\/strong\u003e without wanting to knead batch after batch.\u003c\/p\u003e\n\u003cp\u003eFor repairs where speed is all that matters (closing a crack and moving on), the 31 remains more efficient. For repairs where you need room to work carefully, go with the 29.\u003c\/p\u003e\n\n\u003ch2\u003eUse Cases in 3D Printing\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eRepairing 3D-printed parts that will be exposed to moisture.\u003c\/strong\u003e Printed vases, bathroom accessories, planter brackets, filter housings, and irrigation system components. Here the 29 is clearly preferable to the 31, thanks to its underwater curing property, which ensures a more reliable seal in damp environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilling gaps and seams on large multi-part prints.\u003c\/strong\u003e When a sectioned printed part has multiple joints to fill, the 12–15 minute open time lets you apply putty across several points before it starts to set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRepairing UV resin prints with print defects.\u003c\/strong\u003e Delaminated layers, porous zones, edges softened by underexposure. The white finish sands flush and covers cleanly with primer and paint.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReinforcing critical joints on functional printed parts.\u003c\/strong\u003e Handles, axles, and hinges that will take regular handling. The underwater cure and moisture resistance make these parts suitable for pieces that will be washed or used in wet environments.\u003c\/p\u003e\n\u003cp\u003eCompatible with PLA, PETG, ABS, and cured UV resin. For bonds that only need adhesive without gap-filling, cyanoacrylate is faster and cleaner — we carry the \u003ca href=\"\/en\/products\/super-adhesivo-gomagom-9-10g-pincel\"\u003eGomaGom 9 Super Adhesive with brush applicator\u003c\/a\u003e in our catalog.\u003c\/p\u003e\u003ch2\u003eGomagom 29 vs Gomagom 31 – Which One to Choose\u003c\/h2\u003e\n\u003cp\u003eWe carry two epoxy putties from the Gomagom family, each formulated for slightly different use cases:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/en\/products\/masilla-epoxi-gomagom-31-30g\"\u003eGomagom 31\u003c\/a\u003e (30 g, sets in ~10 min, light finish):\u003c\/strong\u003e \u003cstrong\u003eexpress\u003c\/strong\u003e repairs. Fix the part and get straight back to work. Typical uses: closing a crack, bonding a break, workshop emergencies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGomagom 29 (this one, 28 g, 12–15 min open time, hardens underwater, white finish):\u003c\/strong\u003e \u003cstrong\u003eall-purpose repair with working time to spare\u003c\/strong\u003e. Extra time to position the putty correctly, plus it's the only product in our catalogue that cures underwater. Typical uses: parts exposed to moisture, leaks, repairs requiring multiple application points.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen the choice isn't clear-cut, we recommend the 29 for its greater versatility — the extra 5 minutes of working time covers more scenarios without any significant loss of speed.\u003c\/p\u003e\n\n\u003ch2\u003eHow to Use It\u003c\/h2\u003e\n\u003cp\u003eThe process follows the standard two-part epoxy putty workflow, with one small detail to keep in mind:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1. Cut the required amount from the stick.\u003c\/strong\u003e The stick is stored inside the screw-top container, wrapped in clear film.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Remove the clear film\u003c\/strong\u003e before kneading. The film prevents the stick from sticking to the container and stops the two components from reacting prematurely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Knead until the putty turns uniformly white.\u003c\/strong\u003e This is the key indicator of a complete mix. If you still see streaks or different shades, it isn't ready — a solid white colour confirms both components are fully combined.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Apply within the next 12–15 minutes.\u003c\/strong\u003e Work onto clean, dry, degreased surfaces. Apply light pressure so the putty conforms to the geometry of the area being repaired.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Sets rigid in 15–20 minutes.\u003c\/strong\u003e Full strength is reached after 24 hours — for load-bearing joints or parts that will be submerged, it's worth waiting until the following day.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant safety information.\u003c\/strong\u003e Causes skin irritation and may trigger an allergic reaction. Wear gloves when kneading. Causes serious eye irritation; if contact occurs, rinse with water for several minutes. Keep out of reach of children.\u003c\/p\u003e\n\n\u003ch2\u003ePackaging and Storage\u003c\/h2\u003e\n\u003cp\u003eGomagom 29 comes in a clear plastic screw-top container, not in a blister pack like other products in the range. This has a practical advantage: the airtight lid keeps the stick protected from ambient moisture between uses. The manufacturer's stated shelf life is \u003cstrong\u003e24 months\u003c\/strong\u003e when stored in a cool, dry place. For hobbyists who use it occasionally, that means one container can last months without losing its properties — as long as you close the lid properly after each use.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e two-part epoxy putty, stick format in airtight lidded container\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e Bisphenol-A-epichlorohydrin + epoxy resins (MW ≤700)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNet content:\u003c\/strong\u003e 28 g (legally declared with ℮ symbol)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking time after kneading:\u003c\/strong\u003e 12–15 minutes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetting time:\u003c\/strong\u003e 15–20 minutes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull cure strength:\u003c\/strong\u003e 24 hours\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCured colour:\u003c\/strong\u003e white (grey-white during kneading)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e sandable, paintable and varnishable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSets underwater:\u003c\/strong\u003e yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3D printing compatibility:\u003c\/strong\u003e PLA, PETG, ABS, cured UV resin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOther materials:\u003c\/strong\u003e stone, metal, wood, ceramic, porcelain, glass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNOT compatible with:\u003c\/strong\u003e polyethylene, polypropylene, PTFE\/Teflon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShelf life:\u003c\/strong\u003e 24 months in a cool, dry place\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e skin and eye irritant — wear gloves and avoid eye contact\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e DUNSA (GomaGom brand, Spain)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReferences:\u003c\/strong\u003e SKU 16080 \/ EAN 8414213160802\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy It from Mr Resin\u003c\/h2\u003e\n\u003cp\u003eThis is the epoxy putty you need if you work with 3D printed parts that will be exposed to moisture — a surprisingly common scenario: vases, plant pots, bathroom accessories, functional components. It's also the most versatile option if you only want ONE epoxy putty in your drawer. If you're already ordering resin, filament or paint, adding the Gomagom 29 fits in the same shipment at no extra cost. Orders over 79 € ship free to mainland Spain.\u003c\/p\u003e\n\u003cp\u003eMr Resin has been serving more than 5,000 makers across Spain, Portugal and France for years. Our catalogue is built around what the community asks for: printers and materials at the core, plus the workshop consumables that become part of everyday use.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"sets underwater\" mean, and how is that useful for 3D printing?\u003c\/strong\u003e\u003cbr\u003e\nIt means the putty can cure properly even when applied to a wet surface — or one that is fully submerged. In 3D printing this opens up two very specific use cases: repairing printed parts that will be in contact with water (vases, plant pots, bathroom fittings, filter components) with a reliable seal; and applying the putty to parts that cannot be fully dried before repair. This is something the \u003ca href=\"\/en\/products\/masilla-epoxi-gomagom-31-30g\"\u003eGomagom 31\u003c\/a\u003e does not explicitly guarantee.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does it differ from the Gomagom 31?\u003c\/strong\u003e\u003cbr\u003e\nThree practical differences: (1) the 29 gives you 12–15 minutes of open working time after kneading; the 31 sets in around 10 minutes, leaving less time to work. (2) the 29 sets underwater; the 31 does not. (3) the 29 cures white; the 31 cures clear\/transparent. For quick fixes, go with the 31. For repairs that need more time, involve mixed materials, or will be exposed to moisture, the 29 is the better choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan it be used to repair UV resin printed parts?\u003c\/strong\u003e\u003cbr\u003e\nYes. It bonds to cured UV resin just as well as to PLA, PETG and ABS. We recommend making sure parts are properly washed and cured before applying the putty, and lightly sanding the contact area to improve mechanical adhesion. The white cured surface sands flush and takes primer and paint without any issues.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy does it cure white?\u003c\/strong\u003e\u003cbr\u003e\nIt's a property of the formulation. The manufacturer's label states it clearly: \"turns white once dry.\" During kneading it passes through a grey-white stage, then cures to a more defined white. For repairs that will remain visible, bear in mind you'll need to sand and prime before painting if you want a coloured finish. On white or light-coloured parts, the cured putty can be barely noticeable even without painting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it for miniature conversion sculpting like green stuff?\u003c\/strong\u003e\u003cbr\u003e\nIt's not the ideal option for this. For fine sculpting and detailed miniature conversions, modelers typically use putties with open working times of several hours (green stuff, milliput, magic sculpt). GomaGom 29 gives you 12–15 minutes — enough for precise repairs and quick detailing of simple features, but not for long sculpting sessions. If your main use is complex conversions, look for a dedicated modeling putty instead.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long does a pot last once opened?\u003c\/strong\u003e\u003cbr\u003e\nThe manufacturer's stated shelf life is 24 months when stored in a cool, dry place. The airtight-lid pot format helps keep the bar protected from ambient moisture between uses, so with occasional workshop use the pot can last a long time. Always close the lid tightly after each use.\u003c\/p\u003e","brand":"GomaGom","offers":[{"title":"Default Title","offer_id":53845812511057,"sku":"16080","price":4.38,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0852\/0414\/0369\/files\/GomaGom_Masilla_epoxy_Universal_29_relleno_y_reparacion_impresion_3D.jpg?v=1779565109","url":"https:\/\/mrresin.es\/en\/products\/epoxy-putty-gomagom-29-28g","provider":"Mr Resin","version":"1.0","type":"link"}