PERMABOND 825

Permabond · Permabond Engineering Adhesives Ltd · SKU 49-825.FL.G020

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.

SPECIAL FEATURE

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.

Permabond 825 in figures

100–150

mPa·s viscosity

180 °C

Thermal aging

75 %

Residual strength after 1,000 h

HDPE

bondable

What sets Permabond 825 apart

180 °C continuous temperature

Thermal aging 1,000 h at 180 °C: ~75% residual strength — the highest heat resistance in the standard CA series.

Bondable to HDPE and LDPE

Bondable without POP primer — a rare property among cyanoacrylate adhesives.

Substrate failure on many plastics

ABS, PVC, PC, and acrylic: bond stronger than the substrate itself.

Fast curing on rubber and phenolic

5–10 seconds — suitable for line production.

Stainless steel peak value

18–22 N/mm² shear strength on stainless steel — significantly higher than on aluminum.

Standard Gap Width

0.15 mm — standard geometries without pre-treatment.

What is Permabond 825 used for?

High-temperature continuous use

Components with long-term thermal stress at up to 180 °C.

Bonds on HDPE and LDPE

Bondable without polyolefin primer — standard polyethylene can be bonded directly.

Stainless steel bonding

Up to 22 N/mm² shear strength on stainless steel — suitable for apparatus and food technology.

Acrylic and plastic bonding

Substrate failure on acrylic, PC, ABS, and PVC — bond stronger than the component.

Special bonding with combined requirements

When heat, polyethylene compatibility, and rapid curing come together.

Processing

Clean surfaces

Bonding surfaces must be clean, dry, and free of grease. Degrease with acetone or isopropanol. Lightly sand aluminum, copper, and their alloys to remove the oxide layer.

Apply adhesive sparingly

Apply Permabond 825 dropwise to one adhesive surface — the thin layer thickness is crucial for rapid curing.

Joining components

Assemble quickly and align correctly. Apply sufficient pressure so that the adhesive spreads into a thin film.

Fixing until hand-tight

Do not disturb or realign until hand strength is achieved (typically a few seconds to one minute, depending on the substrate). Final strength after 24 hours.

Remove adhesive residue

Excess adhesive can be removed with Permabond CA Solvent 2, nitromethane, or acetone.

Data Sheets & Safety Data Sheet

Complete TDS and SDS in DE, EN, FR — view or download directly.

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Recommended accessories

Permabond Activator CSA

Accelerates curing and enables bonding on porous or acidic surfaces.

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Permabond POP Primer

Polyolefin primer for the pretreatment of PP, PE, PTFE and silicone — without primer, reliable cyanoacrylate bonding is not possible on these materials.

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Permabond Cleaner A Aerosol

Spray cleaner for rapid degreasing and preparation of bonding surfaces before applying cyanoacrylate.

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Permabond CA Solvent 2

Special solvent for removing cured cyanoacrylate adhesive residues — gentler than acetone or nitromethane.

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Important Notes

Not suitable for / Important notes

For porous or difficult surfaces, Permabond CSA-Activator is recommended. The direct bondability to HDPE/LDPE is a special feature — for PP, PTFE, and silicone, Permabond POP-Primer is still required.

Storage

Store refrigerated at 2 to 7 °C. Allow the bottle to warm to room temperature before opening — prevents condensation and protects shelf life.

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

Topics & Application Fields

Key terms related to this product. Also useful for our search and filters.

Cyanoacrylate Ethyl Cyanoacrylate Low Viscosity Solvent-Free Industrial Adhesive Instant Adhesive Fast-Drying Adhesive Plastic Adhesive Metal Adhesive Rubber Adhesive PERMABOND 825 High-Temperature Adhesive

Technical data for PERMABOND 825

All 18 Product Information 5 Physical Properties 4 Curing Values 5 Mechanical Properties 1 Shear Strength ISO 4587 in N/mm² 1 Thermal Properties 2

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

Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.

Documents and data sheets

Click on a document for the preview or the download icon for direct download.

Technical Data Sheets (TDS) 3

Permabond 825 - Technical Data Sheet DE.pdf

335 KB

Permabond 825 - Technical Data Sheet EN.pdf

375 KB

Permabond 825 - Technical Data Sheet FR.pdf

338 KB

Safety Data Sheets (SDS) 3

Permabond 825 - Safety Data Sheet DE.pdf

395 KB

Permabond 825 - Safety Data Sheet EN.pdf

390 KB

Permabond 825 - Fiche de Sécurité FR.pdf

394 KB

Frequently Asked Questions about Permabond 825

Practical application and design questions — answered by SILITECH.

What is Permabond 825 suitable for?

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.

Which materials can be bonded with Permabond 825?

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.

What special property does Permabond 825 have?

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.

What is the working time of Permabond 825?

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.

What is the difference between Permabond 825 and Permabond 801?

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).

How long is Permabond 825 stable after opening?

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.

Which Permabond cyanoacrylate adhesive is right for my material?

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.

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Product Specifications

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

Keywords
Keywords	Cyanoacrylate Ethyl Cyanoacrylate Low Viscosity Solvent-Free Industrial Adhesive Instant Adhesive Fast-Drying Adhesive Plastic Adhesive Metal Adhesive Rubber Adhesive PERMABOND 825 High-Temperature Adhesive

Documents and data sheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) for download:

PERMABOND 825

Price on request

Documents

Shipping & Delivery

Product data

What sets Permabond 825 apart

What is Permabond 825 used for?

Processing

Recommended accessories

Important Notes

Which Permabond for which application?

Technical data for PERMABOND 825

Documents and data sheets

Technical Data Sheets (TDS) 3

Safety Data Sheets (SDS) 3

Frequently Asked Questions about Permabond 825

Your question not covered?

Product Specifications

Documents and data sheets