Akemi Akepox 2000 Flowing Epoxy: A Laminating Spotlight

Every stone shop eventually meets a job that a knife-grade adhesive cannot handle well. A hairline fissure that runs halfway across a granite slab, a thin marble veneer that needs a fiberglass backing before it can be cut, a terrazzo repair that has to wick deep into the matrix, or a large horizontal bond line that needs full contact with no voids. These are jobs for a flowing epoxy, a liquid resin that levels itself, wets out the surface and penetrates where a paste simply sits on top. Akemi's Akepox 2000 is one of the longest-established products in that category.

This spotlight looks at what Akepox 2000 is, what the manufacturer's technical data sheet actually says about mixing, working time and cure, and how fabricators use it for laminating, crack filling and horizontal bonding. It also covers the limits that matter in practice, including the yellowing warning on light stone and the materials it will not bond. The product page on Dynamic Stone Tools is the 1.5 kg pack, and every figure below comes from Akemi's own documentation. Where the store listing and the manufacturer differ, the manufacturer wins.

What Akepox 2000 Is and Why a Flowing Epoxy Matters

Akemi describes Akepox 2000 as a liquid, solvent-free, two-component epoxy adhesive built on epoxy resin with a modified polyamine hardener. On its product finder, the company lists it for bonding, filling pores and fissures, resinating and laminating, and notes that it is suited to bonding in a horizontal position, for interior and exterior use. The listed materials include natural stone, granite, marble, limestone, concrete, terrazzo, glass and carbon fiber, glass, wood, PVC and acrylic. In other words, it is a general-purpose structural resin for the stone trade rather than a cosmetic filler.

The flowing consistency is the whole point. A knife-grade epoxy stays where you put it, which is ideal for vertical seams and edge build-ups, but it does not travel into a crack or wet out a sheet of glass fabric. A liquid resin does both. It finds its way into fine fissures, soaks through a reinforcing mesh, and levels across a horizontal bond so that the two faces meet with full contact. That is why flowing epoxies are standard for slab reinforcement and lamination, while knife-grade products handle the vertical and gap-filling work.

Being solvent-free also matters. There is no carrier that has to evaporate, so the resin that goes into the joint is the resin that stays there. Akemi's technical data sheet highlights low shrinkage and a weather-resistant bond, and lists Akepox 2000 for both inside and outside use. For a fabricator, that translates into fewer surprises such as sunken fills or stressed bond lines after the piece has been polished and installed, provided the mix ratio and cure temperature are respected.

Akemi's product finder adds a few practical descriptors that are worth knowing: rigid when cured, excellent polishing ability, slow hardening with a long working time, and good adhesion on humid stone. A slow, rigid, polishable epoxy is exactly what you want for lamination and fissure work, where you need time to position mesh or flood a crack and then want a fill that grinds and polishes with the stone instead of smearing. It is not the product to reach for when you need a piece moved in ten minutes.

Working With Akepox 2000: Mixing, Pot Life and Cure

Mix ratio and measuring

Akepox 2000 mixes at 2 parts component A to 1 part component B, by weight or by volume, according to both the technical data sheet and Akemi's product page. Mix until the color is completely uniform, scraping the sides and bottom of the cup. Akemi's datasheet advises separate spatulas for each component so that neither can contaminate the other in its can. Getting the ratio wrong is the most common cause of a soft or tacky epoxy, so weighing on a small scale is the most reliable method for production work.

Pot life depends on temperature

Akemi publishes pot life for a 150 g batch, 100 g of A plus 50 g of B. Heat accelerates the reaction and cold slows it, so the same mix behaves very differently in a cold shop in winter and a hot yard in summer. A larger mass in a deep cup also builds its own heat, so pour mixed resin into a wider, shallower container if you need to stretch the working time. Never try to use resin that has already started to thicken or gel, because it will not wet out the surface properly.

Cure schedule and minimum temperature

At 20°C, Akemi states that bonded parts can be moved after 6 to 8 hours, worked further after 12 to 16 hours, and reach maximum strength after 7 days. The datasheet is clear that the adhesive should not be used below 10°C, because it will not harden sufficiently. That is a real constraint in unheated shops and on winter jobsites. If the stone itself is cold, warm the work area and the slab before applying, not just the resin, because a cold substrate pulls heat out of a thin bond line.

Coloring the resin

Akemi allows Akepox 2000 to be tinted with AKEPOX color pastes or color concentrates, up to a maximum of 5 percent. Respecting that limit protects the cure. When matching a granite or a dark marble for crack filling, build the color gradually on a scrap of the same stone, let it cure and polish it before committing, since a wet sample rarely looks the way the polished fill will. Add colorant to the mixed resin and stir thoroughly so streaks do not appear in the finished fill.

Trade Applications: Laminating, Fissures and Horizontal Bonds

Laminating with glass fabric is the use most fabricators buy this product for. Akemi's datasheet states that lamination work is possible in combination with glass fabric and describes the resin as suitable for sandwich parts. In practice that means backing a thin or fragile slab with fiberglass mesh before cutting, or building a laminated edge or panel. Roll or squeegee a thin coat onto a clean, dry back, lay the mesh, then wet it through with more resin until the weave is saturated and no dry patches remain. Work horizontally, because a flowing resin will run off an inclined surface.

Crack and fissure filling is the second core job. A flowing epoxy is able to travel into a fine fissure where a paste would bridge the top and leave a void underneath. Clean the crack thoroughly with compressed air, make sure it is dry, and let the mixed resin flood into it. On deeper cracks, a slight overfill lets you grind back flush once the resin has cured enough for further processing. Akemi's note about excellent polishing ability is useful here, because the cured fill can be brought up through the pad sequence with the surrounding stone.

Horizontal structural bonding is the third. Akemi lists Akepox 2000 as suited to bonding in a horizontal position, which covers jobs such as laminating a build-up strip under a countertop edge, bonding stone to stone face to face, or bonding stone to a rigid backing. Because it is liquid, use it where the bond line lies flat and gravity helps rather than fights you. Clamp or weight the pieces lightly and evenly; over-clamping squeezes out the resin and starves the joint, which defeats the purpose of choosing a flowing adhesive.

Know what it will not bond. The datasheet lists polyolefins such as polyethylene and polypropylene, silicone, PTFE, flexible PVC and butyl rubber as not bondable. That rules out mixing in a polyethylene cup and expecting it to stick, which is actually handy for mixing containers, but it also means you cannot use Akepox 2000 to fix stone to a silicone-contaminated surface. Old silicone residue on a repair has to be removed completely before any epoxy will hold.

Surface preparation decides the result more than the resin itself. Both faces should be clean, free of dust from cutting, and free of oil and wax. Akemi notes good adhesion on humid stone, but humid is not the same as wet or contaminated with slurry, so rinse off cutting residue, let surfaces dry as much as practical, and lightly abrade glossy faces to give the resin a mechanical key. On resin-treated slabs from the factory, check with the slab supplier whether a backing epoxy is compatible with their resin system.

Ventilation and skin protection still apply even though the product is solvent-free. Akemi refers users to the safety data sheet for each component and recommends hand protection, and the company sells a barrier cream product for this purpose. Wear nitrile gloves and eye protection when mixing, keep the cans closed when not in use, and clean tools while the resin is still liquid. Akemi specifies its Nitro-Dilution thinner for cleaning tools, and once the resin has hardened it no longer responds to cleaning solvents.

Storage, Shelf Life and Long-Term Performance

Storage is simple but often ignored. Akemi instructs users to keep the product cool and dry in the firmly closed original containers. The shelf life figure differs between datasheet revisions, so check the production date on the can and the current technical data sheet rather than relying on a number you remember. Resin and hardener that have been left open, frozen or overheated may thicken or crystallize and can produce an incomplete cure. Rotate stock so the oldest cans go into production first.

Treat the cure schedule as a production plan. If a laminated slab will be cut the next morning, the timing works at a normal shop temperature, but if the shop drops toward the minimum overnight, the resin may still be too soft for clean cutting and edge work. Moving parts after 6 to 8 hours is fine for repositioning, but avoid loading or polishing heavily until the further processing window has passed, and plan installation so the bond has time to approach full strength before the piece is placed into service.

Outdoors and on monuments, the weather resistance described by Akemi is an advantage, but sunlight-driven yellowing is the other half of that story. On a dark granite memorial base or a hidden structural joint, the color change is irrelevant. On a light façade panel with a visible fill, it will eventually show. Choose the epoxy for the exposure and the color of the stone, not just the strength of the bond, and keep this product in the jobs where its strengths line up with the conditions.

Over the long term, the most reliable laminated and repaired pieces share the same habits: correct ratio by weight, a warm enough shop, fully saturated mesh, a clean and dry substrate, and patience during the cure. Akepox 2000 rewards that discipline with a rigid, polishable, weather-resistant bond. When a job calls for color stability on light stone, a fast set, or a vertical application, pick a different product from the same family or another manufacturer and check its own data sheet first.

You can find Akepox 2000 Flowing Two-Component Epoxy (1.5 kg) in our epoxy adhesives collection, along with Akemi epoxy colorant tubes for tinting, Akemi Liquid Glove barrier cream, and the Akemi Epoxy Remover for cleaning up residue on stone surfaces.