Description
Description
Akemi EVERCLEAR 510 Knife-Grade Gel 2-Component PUR Adhesive
AKEMI® EVERCLEAR 510 is a professional, gel-like, solvent-free two-component polyurethane (2C-PUR) adhesive engineered for the stone-working industry. Its knife-grade consistency gives it good stability on vertical surfaces while still allowing thin, precise bonding joints, and its water-clear, transparent formula has a very high stability to yellowing — making it the go-to choice for bonding and filling very light-colored, white, and even transparent natural and artificial stone. Parts A and B are combined at a simple 1:1 ratio to give a low-shrinkage, grindable and polishable bond on marble, granite, Techno Ceramic, engineered stone, terrazzo, concrete, and many other materials, indoors and out.
- Water-clear & yellowing-stable — built for white and light-colored stone, indoors and outdoors
- Knife-grade gel — holds on vertical surfaces yet allows thin, precise glue lines
- Simple 1:1 mixing (Part A : Part B) — solvent-free with very low shrinkage
- Grindable & polishable after cure — no bleeding in the contact zone
- Tintable with AKEMI® Polyester Colouring Pastes / Concentrates (up to 2%)
| Property | Detail |
|---|---|
| Brand | Akemi |
| Manufacturer | AKEMI GmbH, Nuremberg, Germany |
| Product Type | Two-component (2K) reaction-resin adhesive |
| Chemical Basis | Polyurethane (2C-PUR), solvent-free |
| Consistency | Knife-grade gel — non-sag, good vertical stability |
| Color | Transparent, colourless — excellent stability to yellowing |
| Mixing Ratio | 1 : 1 (Part A : Part B) by weight (e.g. 100 g : 100 g) |
| Working / Pot Life | Approx. 5–12 min at 68°F (20°C), depending on reactivity grade (a slower 25-minute grade is also offered) |
| Parts Movable After | Approx. 2–3 hours at 68°F (20°C) |
| Ready for Further Processing | Approx. 6–8 hours at 68°F (20°C) — grindable & polishable |
| Full / Maximum Strength | After approx. 7 days at 68°F (20°C) |
| Hardness | Approx. 77 Shore D after 7 days at 68°F (20°C) |
| Bending Strength | 7,250–8,700 psi (50–60 N/mm², DIN EN ISO 178) |
| Tensile Strength | 2,900–4,350 psi (20–30 N/mm², DIN EN ISO 527) |
| Density | Part A approx. 1.10 g/cm³ · Part B approx. 1.16 g/cm³ |
| Recommended Application Temp. | At least 59°F (15°C); do not use below 41°F (5°C) |
| Service Temperature | Not permanently above 140°F (60°C); short-term up to 212°F (100°C) |
| Colorant | AKEMI® Polyester Colouring Pastes / Concentrates, up to 2% |
| Tool Cleaner | AKEMI® Universal Dilution (uncured adhesive) |
| Storage | At least 12 months at 41–77°F (5–25°C), sealed |
| Available Sizes | 400 mL 2C cartridge · 1,080 g can-and-tube kit |
- Transparent, colourless with excellent stability to yellowing — safe on white and light-colored stone, indoors and outdoors
- Gel-like knife-grade consistency: good stability in vertical areas, yet thin bonding joints can still be made
- Solvent-free with very low shrinkage, so only minimal tension builds within the bonding joint
- No discolouration or bleeding in the contact / marginal zone
- Very good grindable and polishable after cure (approx. 8 hours at 68°F / 20°C)
- Suitable for hard stone (granite, Techno Ceramic) indoors and outdoors, and soft stone (marble, Jura limestone) indoors
- Easily coloured with AKEMI® Polyester Colouring Pastes / Colouring Concentrates or Spectrum Pastes (up to 2%)
- Very low emission — GEV EMICODE® EC1PLUS, emission class A+
Recommended for bonding & filling:
- Natural stone — marble, granite, Jura limestone (soft stone indoors; hard stone indoors & outdoors)
- Techno Ceramic and engineered / artificial stone
- Building materials — terrazzo and concrete
- Other materials such as plastics, paper, wood and glass (a test bond is recommended)
Not suitable for: polyolefins (polyethylene, polypropylene), PTFE (Teflon), silicone, and plasticiser-containing materials such as soft PVC.
Only conditionally suitable in areas of permanent moisture or in direct contact with water.
- Thoroughly clean the surfaces (free of dust, dirt and grease) and slightly roughen smooth surfaces. Surfaces must be dry — humidity causes bubbles and a loss of strength.
- Mix Part A with Part B at a strict 1:1 ratio (e.g. 100 g : 100 g) until a uniform, homogeneous mixture is achieved. From a 2C cartridge, run material from both openings and discard the first approx. 4 in (10 cm) from the mixing nozzle.
- If desired, tint with up to 2% AKEMI® Polyester Colouring Pastes / Concentrates or Spectrum Pastes.
- The mixture stays workable for approx. 5–12 minutes at 68°F (20°C) depending on grade. Working time shortens in heat and lengthens in cold.
- Bonded parts may be moved after approx. 2–3 hours, further processed (ground/polished) after approx. 6–8 hours, and reach maximum stability after 7 days (all at 68°F / 20°C).
- Clean tools immediately with AKEMI® Universal Dilution before the adhesive cures. Curing is accelerated by heat and delayed by cold.
- Keep the exact 1:1 mixing ratio — an excess of either component acts as a plasticiser and can slowly cause yellowing and weaken the bond.
- Bond only dry, clean, grease-free surfaces; moisture forms bubbles in the glue and reduces stability.
- Recommended application temperature at least 59°F (15°C); do not use below 41°F (5°C), or it will not sufficiently harden.
- Do not permanently expose the bond above 140°F (60°C); brief exposure up to 212°F (100°C) is possible.
- Only conditionally suitable for permanently wet areas or direct water contact.
- Cured adhesive can be removed only mechanically.
- Industrial chemical product — use only in well-ventilated areas and wear chemical-resistant gloves and eye protection. Always consult the AKEMI Safety Data Sheet (SDS) before use.
Industrial chemical product. Use only in well-ventilated areas. Wear chemical-resistant gloves and eye protection. Consult the AKEMI Safety Data Sheet (available from the manufacturer or stein.akemi.de) before use. Technical values are manufacturer figures at 68°F (20°C) and may vary with jobsite conditions.
