Silicones, silicone oils, sprays
Casting and potting resins)
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Technical Data
Typical values, not a specification. The technical data sheet (TDS) is binding.
Product Information
- Manufacturer
- Permabond Engineering Adhesives Ltd
- Brand
- Permabond
- Container
- 20 g, 50 g, 500 g
- Country of origin
- Italy
- Tensile Strength
- 25 N/mm²
Performance at Full Cure
- Impact strength (ASTM D-950)
- 5-10 kJ/m²
- Dielectric strength
- 25 kV/mm
Physical Properties
- Color
- black
- Chemical group
- Ethyl Cyanoacrylate
- Viscosity (adhesives)
- Medium viscosity 500 - 5000 mPas
- Viscosity mPa.s
- 2000-4000
Curing values
- Maximum gap fill (mm)
- 0.5
- Fixture time on steel (sec.)
- 15-20
- Handling strength of aluminum (sec.)
- 30-35
- Hand Strength Rubber (sec.)
- 10-15
- Hand Strength Phenol (sec.)
- 5-10
- Final strength
- 24 hours
Mechanical properties
- Hardness (Shore D)
- 85
Shear strength ISO 4587 in N/mm²
- Steel
- 19-23
- Aluminum
- 13-15
- PVC
- >6
- PC
- >5
Thermal Properties
- Operating temperature (°C)
- -55 to +120
- Storage Temperature (°C)
- 2-7
Product Description
Permabond 737MM is a black pigmented, high-viscosity cyanoacrylate paste — designed for bonding gaps up to 0.5 mm, vertical applications and impact/peel-loaded joints where liquid superglues would fail.
With a viscosity of 2,000 to 4,000 mPa·s, 737MM is a true adhesive paste—it doesn't run, stays precisely where it's applied, and reliably fills gaps up to 0.5 mm. This property makes 737MM the first choice for applications with large tolerances, vertical adhesive joints, or overhead applications.
The toughened chemistry provides impact resistance of 5–10 kJ/m² and peel strength of 40–60 N/25 mm—values that a conventional cyanoacrylate adhesive product cannot achieve. On steel, it achieves a shear strength of 19–23 N/mm² and a tensile strength (ISO 6922) of 25 N/mm². The black pigmentation makes 737MM visually unobtrusive on dark substrates.
Highly viscous, black pigmented paste with 0.5 mm gap filling capacity — fills gaps too large for standard cyanoacrylates and remains firmly in place even in vertical bonding applications due to its toughness. Elastically toughened for impact and peel stress.
What distinguishes Permabond 737MM
What is Permabond 737MM used for?
Processing
Recommended accessories
Important Notes
Which Permabond for which application?
Permabond 737MM in direct comparison with related cyanoacrylate products.
Permabond 737MM Current Product | Permabond 731 Clear → | Permabond 735 → | Permabond 792 → | |
|---|---|---|---|---|
| Chemistry | Ethyl cyanoacrylate (toughened) | Ethyl-CA (toughened) | Ethyl-CA (toughened) | Ethyl-CA |
| Viscosity | 2,000–4,000 mPa·s (paste) | 150 mPa·s | 100–200 mPa·s | 60–125 mPa·s |
| Max. gap fill. | 0.5 mm | 0.15 mm | 0.15 mm | 0.15 mm |
| Finger-tight on steel | 15–20 s | <30 s | 30–50 s | 2–3 s |
| Shear strength steel | 19-23 N/mm² | 24–30 N/mm² | 24–30 N/mm² | 18–22 N/mm² |
| Strength / Recommended for | Gap filling 0.5 mm | Low viscosity, colorless | Medium viscosity, black | Standard colorless |
Frequently asked questions about Permabond 737MM
Practical application and design questions — answered by SILITECH.
Permabond 737MM is an ethyl cyanoacrylate (toughened) instant adhesive with a viscosity of 2,000–4,000 mPa·s (paste) and a maximum gap filling capacity of 0.5 mm. Black, high-viscosity CA paste — fills gaps up to 0.5 mm, toughened.
Permabond 737MM reliably bonds steel (19–23 N/mm²), aluminum (13–15 N/mm²), ABS (>8 N/mm² (substrate failure)), PVC (>6 N/mm² (substrate failure)), polycarbonate (>5 N/mm² (substrate failure)), 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.
Highly viscous, black pigmented paste with 0.5 mm gap filling capacity — fills gaps too large for standard cyanoacrylates and remains firmly in place even in vertical bonding applications due to its toughness. Elastically toughened for impact and peel stress.
Permabond 737MM reaches handling strength on steel in 15–20 s. Other typical curing times: 30–35 s (aluminum), 10–15 s (Buna N), 5–10 s (phenol). The final strength of 19–23 N/mm² (steel) is reached after 24 hours. Temperature, humidity, and substrate affect the curing rate.
Permabond 737MM offers a viscosity of 2,000–4,000 mPa·s (paste), 0.5 mm gap filling, and 19–23 N/mm² shear strength on steel. Permabond 731 Clear has a viscosity of 150 mPa·s, 0.15 mm gap filling, and 24–30 N/mm² shear strength on steel (low viscosity, colorless). Both utilize an ethyl cyanoacrylate (toughened) base (or a related cyanoacrylate variant).
Permabond 737MM 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 a test bond to check reactivity before critical production applications.
From the Permabond cyanoacrylate range, select according to viscosity and special properties: Permabond 737MM (2,000–4,000 mPa·s (paste), 0.5 mm gap width, gap filling); Permabond 731 Clear (150 mPa·s, 0.15 mm, low viscosity, colorless); Permabond 735 (100–200 mPa·s, 0.15 mm, medium viscosity, black); Permabond 792 (60–125 mPa·s, 0.15 mm, standard colorless). For polypropylene, polyethylene, PTFE, and silicone, pretreatment with Permabond Polyolefin Primer (POP) is always required.