Silicones, silicone oils, sprays
Casting and potting resins
![youtube - [Video]](https://www.silitech.ch/web/image/product.image/433/image_128/youtube - [Video])
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
- Country of origin
- Italy
- UFI (Unique Formula Identifier)
- J521-90W4-Y00E-0R3U
Physical Properties
- Color
- colorless
- Chemical group
- Ethyl Cyanoacrylate
- Viscosity (adhesives)
- Low viscosity <500 MPas
- Viscosity mPa.s
- 100-150
Curing values
- Maximum gap fill (mm)
- 0.15
- Fixture time on steel (sec.)
- 10-20
- 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
- 15-20
Thermal Properties
- Operating temperature (°C)
- -40 to 200
- Storage Temperature (°C)
- 2-7
Product Description
Permabond 825 is the premium high-temperature cyanoacrylate adhesive of the 800 series — developed for continuous use at up to 180 °C and also bondable to HDPE and LDPE without the need for a polyolefin primer.
With 100–150 mPa·s, 825 is medium-viscosity. What distinguishes 825 from the other high-temperature variants is its excellent resistance to thermal aging: after 1,000 hours at 180 °C, approximately 75% of the initial strength is retained — values that 801 / 802 / 820 do not achieve.
On steel, 825 provides 15–20 N/mm² shear strength, and up to 22 N/mm² on stainless steel. Cure times are particularly short on NBR and phenolic resin, at 5–10 seconds. Exceptional for a cyanoacrylate: 825 also bonds HDPE (10–20 seconds hand strength) and LDPE (40–60 seconds) without a polyolefin primer — albeit with reduced strength compared to standard substrates.
Highest heat resistance of the Permabond standard CA series — after 1,000 hours of thermal aging at 180 °C, approximately 75% of the initial strength remains. Additionally, it can bond HDPE and LDPE — a rare property for cyanoacrylates.
What sets Permabond 825 apart
What is Permabond 825 used for?
Processing
Recommended accessories
Important Notes
Which Permabond for which application?
Permabond 825 in direct comparison with related cyanoacrylate products.
Permabond 825 Current Product | Permabond 801 → | Permabond 802 → | Permabond 820 → | |
|---|---|---|---|---|
| Chemistry | Ethyl Cyanoacrylate | Ethyl-CA | Ethyl-CA | Ethyl-CA |
| Viscosity | 100-150 mPa·s | 10–15 mPa·s | 90–110 mPa·s | 100 mPa·s |
| Max. gap fill. | 0.15 mm | 0.05 mm | 0.15 mm | 0.15 mm |
| Finger-tight on steel | 10–20 s | 10–15 s | 10–15 s | 10–15 s |
| Shear strength steel | 15-20 N/mm² | 19–23 N/mm² | 19–23 N/mm² | 19–23 N/mm² |
| Strength / Recommended for | Thermally aging resistant 180 °C | Ultra-low, Wicking | Medium viscosity, standard | High-temp + biocompatible |
Frequently Asked Questions about Permabond 825
Practical application and design questions — answered by SILITECH.
Permabond 825 is an ethyl cyanoacrylate instant adhesive with a viscosity of 100–150 mPa·s and a maximum gap fill of 0.15 mm. Premium high-temperature cyanoacrylate adhesive up to 180 °C — also for HDPE and LDPE.
Permabond 825 reliably bonds steel (15–20 N/mm²), aluminum (12–16 N/mm²), ABS (>6 N/mm² (substrate failure)), PVC (>5 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.
Highest heat resistance of the Permabond standard CA series — after 1,000 hours of thermal aging at 180 °C, approximately 75% of the initial strength remains. Additionally bondable to HDPE and LDPE — a rare property for cyanoacrylates.
Permabond 825 achieves hand strength on steel in 10–20 s. Other typical curing times: 5–10 s (NBR), 5–10 s (phenolic), 10–20 s (HDPE), 40–60 s (LDPE). The final strength of 15–20 N/mm² (steel) is reached after 24 hours. Temperature, humidity, and substrate affect the curing speed.
Permabond 825 offers 100–150 mPa·s viscosity, 0.15 mm gap filling, and 15–20 N/mm² shear strength on steel. Permabond 801 has 10–15 mPa·s viscosity, 0.05 mm gap filling, and 19–23 N/mm² on steel (ultra-low, wicking). Both use the ethyl cyanoacrylate base (or a related cyanoacrylate variant).
Permabond 825 is stored unopened under refrigeration at 2 to 7 °C and remains stable until the printed expiration date. Before opening, allow the bottle to warm to room temperature — this prevents condensation inside, which would reduce shelf life. Opened bottles remain functional for several months when stored correctly; however, the curing speed may decrease over time. Before important production applications, we recommend a test bonding to check reactivity.
From the Permabond cyanoacrylate series, choose according to viscosity and special properties: Permabond 825 (100–150 mPa·s, 0.15 mm gap fill, thermally aging resistant); Permabond 801 (10–15 mPa·s, 0.05 mm, ultra-low, wicking); Permabond 802 (90–110 mPa·s, 0.15 mm, medium viscosity, standard); Permabond 820 (100 mPa·s, 0.15 mm, high temperature + biocompatible). For polypropylene, polyethylene, PTFE, and silicone, pretreatment with Permabond Polyolefin Primer (POP) is always required.