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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 width (mm)
  • Drip time 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 will be confirmed after ordering)

. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

Internal reference: 49-538.KT

HS code: 3506.9190000

Internal reference: 49-538.KT
HS code: 3506.9190000

PERMABOND ET538
PERMABOND ET538
Permabond · Permabond Engineering Adhesives Ltd · SKU 49-538.KT

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
Potting time
25–30
N/mm² steel
20–24
N/mm² Carbon
1:1
mixture

What distinguishes Permabond ET538

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

What is Permabond ET538 used for?

Plant construction
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 dual cartridges: Attach the mixing nozzle and press evenly (1:1 volume mixing ratio). For larger containers: Weigh out the resin and hardener in the correct ratio and mix thoroughly until no streaks are visible. Avoid air bubbles.
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 in place during curing
Use a clamping device or vise to prevent the components from moving during curing. Wait for handling strength and functional strength to be determined according to the TDS (Technical Data Sheet).
5
Full curing at room temperature
Final strength is typically reached after 24 hours at 23 °C. Increasing the temperature by 8 °C halves the curing time; lower temperatures slow down the process. If required, optional post-curing at 60–80 °C for maximum strength.
Data sheets & safety data sheet
Full 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 twin cartridges with 1:1 and 2:1 mixing ratios — precise dispensing without waste for multi-component adhesives.
View product →
Mixing nozzle MBQ 05-24L (50 ml)
Static mixing nozzle for 50 ml dual cartridges (1:1 / 2:1) — nozzle with Luer-Lock tip recommended by Permabond for this product.
View product →
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.
View product →
Permabond Cleaner A Aerosol
Spray cleaner for quickly degreasing the bonding surfaces before applying the 2K epoxy.
View product →
Permabond ET515 — aerospace star
Highly flexible 1:1 epoxy for aircraft seat trays and composite structural bonding — Permabond recommended for aerospace.
View product →
Permabond ET5162 — Food
EU 10/2011 + FDA compliant for direct food contact — the premium choice for food processing.
View product →
Permabond ET5441 — Thermally conductive
UL94-V0 + 1.0–1.4 W/(m·K) thermal conductivity — for heat sinks, batteries and power electronics.
View product →

Important instructions

Important instructions
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 — protect the hardener especially from moisture.

Which Permabond 2K epoxy is suitable 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 potting timeMedium pot life, higher steel strength2:1 ratio with long pot life
Mixing ratio1:1 volume parts1:11:12:1
Potting time120–150 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 Areas
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 final strength
Peel resistance (aluminum) (ISO 4578) 60-80 N/25mm
Dielectric strength 15-25 kV/mm
Thermal conductivity 0.55 W/(mK)
Properties of the adhesive
Functional strength 24 hours
Physical properties
Color gray
Viscosity (adhesives) Thick paste
Curing values
Maximum gap width (mm) 5
Drip time 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
Generally
TG value +45-55°C

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) 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 final strength
Peel resistance (aluminum) (ISO 4578) 60-80 N/25mm
Dielectric strength 15-25 kV/mm
Thermal conductivity 0.55 W/(mK)
Properties of the adhesive
Functional strength 24 hours
Physical properties
Color gray
Viscosity (adhesives) Thick paste
Curing values
Maximum gap width (mm) 5
Drip time 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 datasheets

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