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PERMABOND ET538

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Permabond ET 538 — Epoxy structural adhesive, Shore D 70-80.

High-strength 2K epoxy with a very long pot life (120–150 min) for large-area structural bonding.

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  • Chemical Group (A)
  • Color (A)
  • Viscosity 20rpm (A)
  • Viscosity 2rpm (A)
  • Specific gravity (A)
  • Chemical Group (B)
  • Color (B)
  • Viscosity 20rpm (B)
  • Viscosity 2rpm (B)
  • Specific Gravity (B)
  • Country of origin
  • Operating temperature (°C)
  • Mixing Ratio
  • Color
  • Viscosity (adhesives)
  • Hardness (Shore D)
  • Storage Temperature (°C)
  • Maximum gap fill (mm)
  • Pot Life at 23°C
  • Functional Strength
  • Peel resistance (aluminum) (ISO 4578)
  • UFI Part A
  • UFI Part B
  • TG Value
  • Dielectric strength
  • Thermal conductivity

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Metal, ceramic, wood, plastic

 
General Terms and Conditions

Shipping usually within 1 to 3 business days
(Availability confirmed after order)

Express logistics. Fast and reliable within Switzerland & Europe

From Swiss stock Dispatch within 24h Batch certificate Invoice 30 days (B2B) Technical advice
Shipping & Delivery

Usually 1 to 3 business days

Availability is confirmed after order receipt.

Express logistics within Switzerland & Europe.

Terms and Conditions →

Product data

HS Code: 3506.9190000

HS Code: 3506.9190000

PERMABOND ET538
PERMABOND ET538
Permabond · Permabond Engineering Adhesives Ltd ·

Permabond ET538 is a high-strength 2K epoxy with an exceptionally long pot life — designed for large-area structural bonding and complex component assemblies where standard epoxies cure too quickly.

With a pot life of 120–150 minutes, ET538 is the longest-lasting 2K epoxy in the ET series — ideal for plant engineering, shipbuilding, wind turbine rotor blades and other large-area structural bonding applications that need to be processed over long distances.

LONG CUPING TIME

Very long pot life of 120–150 minutes — the choice for large-area structural bonding, complex multi-component assembly, or high-volume production with long mixing cycles. High final strength of 25–30 N/mm² steel.

Permabond ET538 in figures
120–150 min
Pot life
25–30
N/mm² Steel
20–24
N/mm² Carbon
1:1
Mixing

What distinguishes Permabond ET538

Very long pot life
120–150 min — industry standard for large parts.
High strength
25-30 N/mm² steel, 20-24 N/mm² carbon fiber.
Large-area bonding
Industrial plant construction, composite structures.
1:1 Mix Ratio
Standard double cartridge or bulk dosing.
Full cure at room temperature
No heat curing required.
Dark grey and white components
Mixed state visible.

What is Permabond ET538 used for?

Plant Engineering
Large structural bonding applications with long processing cycles.
Wind turbine rotor blades
Composite structural bonding.
Shipbuilding and yacht building
Large-area GRP/CFRP bonding.
Bridge construction composites
Large component assemblies.
Tractors and wagons
Structural bonding with repair pot life.

Processing

1
Clean surfaces
Bonding surfaces must be clean, dry, and free of grease. Degrease with Permabond Cleaner A or a solvent (acetone, isopropanol). Lightly sand aluminum and copper to remove oxide layers.
2
Mix components A + B
For twin cartridges: attach mixing nozzle, press evenly (1:1 by volume mixing ratio). For larger containers: weigh resin and hardener in the correct ratio and mix thoroughly until no streaks are visible. Avoid air entrapment.
3
Apply adhesive + join components
Apply the mixed adhesive to a bonding surface within the pot life (120–150 minutes @ 23 °C). Join the components with sufficient pressure to ensure the adhesive is distributed over the entire bonding surface.
4
Fix components during curing
Use a clamping device or clamp to ensure the components do not move during curing. Wait for handling strength and functional strength according to the TDS.
5
Full cure at room temperature
Final strength is typically achieved after 24 hours at 23 °C. Increasing the temperature by 8 °C halves the curing time; lower temperatures slow down the process. If necessary, optionally post-cure at 60–80 °C for maximum strength.
Data Sheets & Safety Data Sheet
Complete TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Recommended accessories

SILISIL Adhesive Dispensing Gun 50 ml
Manual dispensing gun for 50 ml dual cartridges with 1:1 and 2:1 mixing ratios — precise dispensing without waste for multi-component adhesives.
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Mixing nozzle MBQ 05-24L (50 ml)
Static mixing nozzle for 50 ml double cartridges (1:1 / 2:1) — nozzle recommended by Permabond for this product with Luer-Lock tip.
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Mixing nozzle MFQ 10-24 T (200/400 ml)
Static mixing nozzle for 200 ml and 400 ml twin cartridges (1:1 / 2:1) — nozzle recommended by Permabond for this product.
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Permabond Cleaner A Aerosol
Spray cleaner for rapid degreasing of bonding surfaces before applying the 2K epoxy.
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Permabond ET515 — Aerospace Star
Highly flexible 1:1 epoxy for aircraft seat trays and composite structural bonding — Permabond-recommended for aerospace.
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Permabond ET5162 — Food Grade
EU 10/2011 + FDA-compliant for direct food contact — the premium choice for food processing.
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Permabond ET5441 — Thermally conductive
UL94-V0 + 1.0–1.4 W/(m·K) thermal conductivity — for heat sinks, batteries, and power electronics.
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Important Notes

Important Notes
Pot life depends on the mixing quantity — larger quantities harden faster (exothermic). Fix components in position before hardening.
Storage
Store at 5 to 25 °C. Keep 2K epoxy components in closed packaging — especially protect the hardener from moisture.

Which Permabond 2K epoxy for which application?

Permabond ET538 in direct comparison with related products of the ET series.

Permabond ET538
Current Product		Permabond ET514 →Permabond ET536 →Permabond ET540 →
Application / PropertyHigh-strength 2-component epoxy with a very long pot life (120–150 min) Short pot lifeMedium pot life, higher steel strength2:1 ratio with long pot life
Mixing ratio1:1 by volume1:11:12:1
Pot life120–150 minutes @ 23 °C30–50 min50–80 min120–150 min
Steel shear strength25–30 N/mm²20–30 N/mm²22–32 N/mm²22–26 N/mm²
Carbon fiber20–24 N/mm²17–21 N/mm²18–22 N/mm²—
Topics & Application Fields
Key terms related to this product. Also useful for our search and filters.
Metal, ceramic, wood, plastic

Technical data for PERMABOND ET538

All 29 product information 5 Physical properties A 6 Physical properties B 6 Performance at final strength 3 Bonding properties 1 Physical properties 2 Curing values ​​2 Mechanical properties 1 Thermal properties 2 General 1
Product Information
Manufacturer Permabond Engineering Adhesives Ltd
Brand Permabond
Container 50 ml, 400 ml
Country of origin Italy
Mixing Ratio 1:1
Physical Properties A
Chemical Group (A) Epoxy resin
Color (A) White
Viscosity 20rpm (A) 50000-100000
Viscosity 2rpm (A) 150000-300000
Specific gravity (A) 1.1
UFI Part A VEF0-Y0EM-600J-SA2S
Physical Properties B
Chemical Group (B) Polyamine hardener
Color (B) Dark grey
Viscosity 20rpm (B) 20000-40000
Viscosity 2rpm (B) 30000-90000
Specific Gravity (B) 1.2
UFI Part B WMF0-Y0TD-T00J-307W
Performance at Full Cure
Peel resistance (aluminum) (ISO 4578) 60-80 N/25mm
Dielectric strength 15-25 kV/mm
Thermal conductivity 0.55 W/(mK)
Bonding Properties
Functional Strength 24 hours
Physical Properties
Color grau
Viscosity (adhesives) Thick paste
Curing values
Maximum gap fill (mm) 5
Pot Life at 23°C 120-150 minutes
Mechanical properties
Hardness (Shore D) 70-80
Thermal Properties
Operating temperature (°C) -40 to +80
Storage Temperature (°C) 5-25
General
TG Value +45-55°C

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) 6
Permabond ET538 - Technical Data Sheet DE.pdf
482 KB
Permabond ET538 - Technical Data Sheet DE.pdf
327 KB
Permabond ET538 - Technical Data Sheet EN.pdf
320 KB
Permabond ET538 - Technical Data Sheet EN.pdf
476 KB
Permabond ET538 - Fiche Technique FR.pdf
300 KB
Permabond ET538 - Fiche Technique FR.pdf
441 KB
Safety Data Sheets (SDS) 3
Permabond ET538 - Safety Data Sheet DE.pdf
418 KB
Permabond ET538 - Safety Data Sheet EN.pdf
396 KB
Permabond ET538 - Fiche de Sécurité FR.pdf
399 KB

Frequently asked questions about Permabond ET 538

Practical application and design questions — answered by SILITECH.

High-strength 2-component epoxy with a very long pot life — 120–150 minutes for large-area structural bonding. The 2-component epoxy is mixed in a 1:1 volume ratio and offers a pot life of 120–150 minutes @ 23 °C.

Mix both components in a 1:1 ratio by volume — using a mixing nozzle for dual cartridges, weigh precisely for larger containers. Apply within the pot life (120–150 minutes @ 23 °C) and join components. Full curing typically occurs after — at room temperature.

The pot life of Permabond ET538 is typically 120–150 minutes at 23 °C. Higher temperatures shorten, lower temperatures lengthen the pot life. Mixing quantities above approximately 100 g may gel more quickly due to an exothermic reaction.

Permabond ET538 bonds reliably to: steel: 25–30 N/mm²; carbon fiber: 20–24 N/mm². For thermoplastic substrates, test compatibility before series production.

Permabond ET538 does not have specific industry-specific approvals such as EU 10/2011 (food), UL94 (fire protection), or Boeing/Airbus (aerospace). For general industrial applications, the product is approved according to Permabond standards.

Permabond ET538 is a high-strength, two-component epoxy with a very long pot life (120–150 min) — for complex, large parts (1:1 volume mix, 120–150 minutes @ 23 °C pot life). Permabond ET514 is standard (1:1, 30–50 min pot life) — short pot life.

From the Permabond 2K epoxy range, select according to application, mixing ratio, and strength requirements: Permabond ET538 (High-strength 2K epoxy with very long pot life (120–150 min)); Permabond ET514 (Standard); Permabond ET536 (High-strength medium); Permabond ET540 (High-strength 2:1). For aerospace applications, see ET515 (Aircraft Seat Trays); for food applications, see ET5162 (EU 10/2011 + FDA); for thermal conductivity/fire protection, see ET5441 (UL94-V0).

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Product Specifications

Product Information
Container 50 ml or 400 ml
Manufacturer Permabond Engineering Adhesives Ltd
Brand Permabond
Country of origin Italy
Mixing Ratio 1:1
Physical Properties A
Chemical Group (A) Epoxy resin
Color (A) White
Viscosity 20rpm (A) 50000-100000
Viscosity 2rpm (A) 150000-300000
Specific gravity (A) 1.1
UFI Part A VEF0-Y0EM-600J-SA2S
Physical Properties B
Chemical Group (B) Polyamine hardener
Color (B) Dark grey
Viscosity 20rpm (B) 20000-40000
Viscosity 2rpm (B) 30000-90000
Specific Gravity (B) 1.2
UFI Part B WMF0-Y0TD-T00J-307W
Performance at Full Cure
Peel resistance (aluminum) (ISO 4578) 60-80 N/25mm
Dielectric strength 15-25 kV/mm
Thermal conductivity 0.55 W/(mK)
Bonding Properties
Functional Strength 24 hours
Physical Properties
Color grau
Viscosity (adhesives) Thick paste
Curing values
Maximum gap fill (mm) 5
Pot Life at 23°C 120-150 minutes
Mechanical properties
Hardness (Shore D) 70-80
Thermal Properties
Operating temperature (°C) -40 to +80
Storage Temperature (°C) 5-25
Uncategorized
TG Value +45-55°C
Keywords
Keywords
Metal, ceramic, wood, plastic

Documents and data sheets

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