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PERMABOND 731 Clear
Permabond 731 Clear — anaerobic adhesive, viscosity 100-200 mPa·s, Shore D 85.
Toughened superglue — impact and peel resistant, biocompatible according to ISO 10993-5.
Documents
Internal reference:
49-731.FL
HS code:
3506.9190000
Permabond 731 Clear is a toughened ethyl cyanoacrylate adhesive that has been specifically optimized to withstand impact and peel stress — the right choice when classic superglues would fail due to brittle fracture.
With a viscosity of 150 mPa·s, 731 falls within the medium viscosity range. The longer curing time on steel (under 30 seconds) allows for precise alignment of the components before the bond is set—on aluminum, the correction window extends to 120 to 180 seconds.
The toughened formulation delivers peel resistances of 40–60 N/25 mm and impact strength of 5–10 kJ/m² (ASTM D-950) — values that a standard ethyl CA such as 102 or 791 does not achieve. On steel, peak shear strength values of up to 30 N/mm² are achieved. The ISO 10993-5 cytotoxicity test further confirms biocompatibility.
Toughened and elasticized — developed for applications requiring impact and peel stress. The peel resistance of 40–60 N/25 mm and the impact strength of 5–10 kJ/m² are significantly higher than standard cyanoacrylates. Cytotoxicity tested according to ISO 10993-5.
What makes Permabond 731 Clear stand out
What is Permabond 731 Clear used for?
processing
Recommended accessories
Important instructions
Which Permabond is suitable for which application?
Permabond 731 Clear in direct comparison with related cyanoacrylate products.
Permabond 731 Clear Current product | Permabond 735 → | Permabond 737MM → | Permabond 792 → | |
|---|---|---|---|---|
| Chemistry | Ethyl cyanoacrylate (toughened) | Ethyl-CA (tough-elastic) | Ethyl-CA (tough-elastic) | Ethyl-CA |
| viscosity | 150 mPa·s | 100-200 mPa·s | 2,000–4,000 mPa·s | 60–125 mPa·s |
| Maximum gap filling. | 0.15 mm | 0.15 mm | 0.5 mm | 0.15 mm |
| Firmly on steel | <30 s | 30–50 s | 15–20 s | 2–3 s |
| Shear strength steel | 24-30 N/mm² | 24-30 N/mm² | 19–23 N/mm² | 18–22 N/mm² |
| Strength / Recommended for | kJ/m² Impact resistant 5–10 | Black instead of colorless | Paste, 0.5 mm gap, black | Standard without toughening |
Technical data for PERMABOND 731 Clear
| Product information | |
|---|---|
| Manufacturer | Permabond Engineering Adhesives Ltd |
| brand | Permabond |
| Container | 20 g, 50 g, 500 g |
| Country of origin | Italy |
| UFI (Unique Formula Identifier) | GTV0-X03H-Y00R-YJYU |
| Performance at final strength | |
|---|---|
| Impact resistance (astm D-950) | 5-10 kJ/m² |
| Dielectric strength | 25 kV/mm |
| Physical properties | |
|---|---|
| Color | colorless |
| Chemical group | Ethyl cyanoacrylate |
| Viscosity (adhesives) | Low viscosity <500 MPas |
| Viscosity mPa·s | 100-200 |
| Curing values | |
|---|---|
| Maximum gap width (mm) | 0.15 |
| Steel hand strength (sec.) | >30 |
| Handling strength of aluminum (sec.) | 120-180 |
| Rubber's hand strength (sec.) | 15-20 |
| ABS hand strength (sec.) | 30-45 |
| Neoprene hand strength (sec.) | 15-20 |
| Hand strength of phenol (seconds) | 15-20 |
| Final strength | 24 hours |
| Mechanical properties | |
|---|---|
| Hardness (Shore D) | 85 |
| Shear strength ISO 4587 in N/mm² | |
|---|---|
| Steel | 24-30 |
| aluminum | 13-15 |
| zinc | 10 |
| PVC | 5.5 |
| Acrylic | 4 |
| Thermal properties | |
|---|---|
| Operating temperature (°C) | -55 to +80 |
| Storage temperature (°C) | 2-7 |
For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.
Documents and datasheets
Click on a document for a preview or the download icon for a direct download.
Technical Data Sheets (TDS) 3
Frequently asked questions about Permabond 731 Clear
Practical application and design questions — answered by SILITECH.
Permabond 731 Clear is a tough-elastic ethyl cyanoacrylate superglue with a viscosity of 150 mPa·s and a maximum gap filling capacity of 0.15 mm. This tough-elastic cyanoacrylate adhesive is impact and peel resistant and biocompatible.
Permabond 731 Clear reliably bonds steel (24–30 N/mm²), aluminum (13–15 N/mm²), as well as Buna-N rubber and similar elastomers. For polypropylene (PP), polyethylene (PE), PTFE, and silicone, pretreatment with Permabond Polyolefin Primer (POP) is required.
Permabond 731 Clear has cytotoxicity testing according to ISO 10993-5 — qualified for demanding industrial applications.
Permabond 731 Clear reaches handling strength on steel in <30 s. Other typical curing times: 120–180 s (aluminum), 15–20 s (Buna N), 30–45 s (ABS). The final strength of 24–30 N/mm² (steel) is reached after 24 hours. Temperature, humidity, and substrate affect the curing rate.
Permabond 731 Clear offers a viscosity of 150 mPa·s, a gap filling capacity of 0.15 mm, and a shear strength of 24–30 N/mm² on steel. Permabond 735 has a viscosity of 100–200 mPa·s, a gap filling capacity of 0.15 mm, and a shear strength of 24–30 N/mm² on steel (black instead of colorless). Both utilize an ethyl cyanoacrylate (toughened) base (or a related cyanoacrylate variant).
Permabond 731 Clear should be stored unopened refrigerated at 2 to 7 °C and is stable until the printed expiration date. Allow the bottle to warm to room temperature before opening—this prevents condensation inside, which would reduce its shelf life. Opened bottles remain functional for several months if stored correctly, although the curing rate may decrease over time. We recommend performing a test bond to check reactivity before critical production applications.
From the Permabond cyanoacrylate range, select according to viscosity and special properties: Permabond 731 Clear (150 mPa·s, 0.15 mm gap width, kJ/m² impact resistant); Permabond 735 (100–200 mPa·s, 0.15 mm, black instead of colorless); Permabond 737MM (2,000–4,000 mPa·s, 0.5 mm, paste, 0.5 mm gap, black); Permabond 792 (60–125 mPa·s, 0.15 mm, standard without toughening). For polypropylene, polyethylene, PTFE, and silicone, pretreatment with Permabond Polyolefin Primer (POP) is always required.
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Product specifications
| Product information | |
|---|---|
| Container | 20 g or 50 g or 500 g |
| Manufacturer | Permabond Engineering Adhesives Ltd |
| brand | Permabond |
| Country of origin | Italy |
| UFI (Unique Formula Identifier) | GTV0-X03H-Y00R-YJYU |
| Performance at final strength | |
|---|---|
| Impact resistance (astm D-950) | 5-10 kJ/m² |
| Dielectric strength | 25 kV/mm |
| Physical properties | |
|---|---|
| Color | colorless |
| Chemical group | Ethyl cyanoacrylate |
| Viscosity (adhesives) | Low viscosity <500 MPas |
| Viscosity mPa·s | 100-200 |
| Curing values | |
|---|---|
| Maximum gap width (mm) | 0.15 |
| Steel hand strength (sec.) | >30 |
| Handling strength of aluminum (sec.) | 120-180 |
| Rubber's hand strength (sec.) | 15-20 |
| ABS hand strength (sec.) | 30-45 |
| Neoprene hand strength (sec.) | 15-20 |
| Hand strength of phenol (seconds) | 15-20 |
| Final strength | 24 hours |
| Mechanical properties | |
|---|---|
| Hardness (Shore D) | 85 |
| Shear strength ISO 4587 in N/mm² | |
|---|---|
| Steel | 24-30 |
| aluminum | 13-15 |
| zinc | 10 |
| PVC | 5.5 |
| Acrylic | 4 |
| Thermal properties | |
|---|---|
| Operating temperature (°C) | -55 to +80 |
| Storage temperature (°C) | 2-7 |
| Keywords | |
|---|---|
| Keywords | |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- Permabond 731 Clear - Fiche Technique FR.pdf (341 KB)
- Permabond 731 Clear - Fiche de Sécurité FR.pdf (334 KB)
- Permabond 731 Clear - Safety Data Sheet EN.pdf (312 KB)
- Permabond 731 Clear - Safety Data Sheet DE.pdf (335 KB)
- Permabond 731 Clear - Technical Data Sheet EN.pdf (376 KB)
- Permabond 731 Clear - Technical Data Sheet DE.pdf (334 KB)