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PERMABOND A129

PERMABOND A129

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Permabond A129 — anaerobic adhesive.

Medium-strength thread sealing gel — for coarse pipe threads, removable with standard tools.

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  • Color
  • Country of origin
  • Chemical group
  • Viscosity (adhesives)
  • Viscosity 2rpm
  • Viscosity 20rpm
  • fluorescence
  • Maximum gap width (mm)
  • Handling strength (M10 steel)@23°C
  • Functional strength (M10 steel) @ 23°C
  • Final strength (M10 steel) @ 23°C
  • Shear strength (steel ISO10123)
  • coefficient of thermal expansion
  • Dielectric strength
  • Thermal conductivity
  • Storage temperature (°C)
  • Operating temperature (°C)

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Thixotropic threaded connections, flange sealants, chemical resistance

 
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: 49-218.FL

HS code: 3506.9190000

Internal reference: 49-218.FL
HS code: 3506.9190000

PERMABOND A129
PERMABOND A129
Permabond · Permabond Engineering Adhesives Ltd · SKU 49-218.FL

Permabond A129 is a medium-strength anaerobic thread sealant in gel form — designed for pressure-tight sealing of coarse pipe threads, with thixotropic consistency for vertical applications and tool-removable locking.

With its thixotropic, non-drip paste consistency, A129 stays precisely where it is applied—even on upright threads. The 0.5 mm gap filling covers coarse pipe and fitting threads where low-viscosity products would fail.

The medium-strength torque (breakaway 12 N·m, further 7 N·m) allows for subsequent disassembly of the connection using standard tools—important for plumbing and pneumatic installations that need to be opened periodically. Corrosion protection and good chemical resistance are also provided.

APPLICATION PROFILE

Thixotropic gel for coarse pipe threads — Permabond A129 seals pipe connections pressure-tight, remains stationary even in vertical threads due to its paste consistency and can later be disassembled with standard tools.

Permabond A129 in figures
gel
Doesn't drip
0.5 mm
Gap filling
12 N·m
Breakaway torque
Tool-removable
Dismantable

What distinguishes Permabond A129

Thixotropic gel
Does not drip from vertical threads — precisely dosable, stationary.
0.5 mm gap filling
For coarse pipe threads without pre-machining.
Tool-removable
Medium strength — Disassembly possible with standard tools.
Corrosion protection
Seals the thread gaps against moisture.
Good chemical resistance
Tolerant towards most industry media.
UV fluorescence
Curing can be checked using UV light.

What is Permabond A129 used for?

Pipe and fitting screw connections
Hydraulic, pneumatic and lubricating oil lines with coarse threads.
Sanitary installation
Threads that should remain pressure-tight but removable.
Pneumatic and hydraulic systems
Screw connections that are opened periodically for maintenance purposes.
Industrial plants with pipelines
Compressed air, cooling water, auxiliary media.
Repair and maintenance
The gel consistency allows for selective application without running.

processing

1
Clean surfaces
Bonding surfaces must be clean, dry, and free of grease. Degrease with Permabond Cleaner A or a solvent (acetone, isopropanol). Rough surfaces (~25 µm) result in higher bond strength than polished surfaces.
2
Apply adhesive
Apply Permabond A129 directly from the bottle — for through holes, apply a stripe along the thread length; for blind holes, apply a few drops to the bottom. Do not touch the nozzle to metal surfaces (this will cause premature hardening in the bottle).
3
assembling components
Insert the screws and tighten them to the required torque. For shaft-hub fits, assemble the components before the adhesive begins to cure.
4
Allow to harden
Anaerobic curing begins in the absence of air and in contact with metal. Handling strength is typically achieved after 15 minutes, functional strength after 1 hour, and full strength after 24 hours at 23 °C.
5
Accelerate curing (optional)
Permabond A905 activator can be used on inactive surfaces (stainless steel, zinc, aluminum) or at low temperatures — applied to one adhesive surface, allowed to evaporate, then adhesive applied to the other side.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Recommended accessories

Permabond A905 Activator
Accelerates anaerobic curing on inactive surfaces such as stainless steel, zinc or aluminum and improves gap curing.
View product →
Permabond A 905 Spray
Aerosol version of the A905 activator — convenient application in inaccessible places or large areas.
View product →
Permabond Cleaner A Aerosol
Spray cleaner for quick degreasing and preparation of the bonding surfaces before applying the anaerobic adhesive.
View product →
Permabond A118 High Strength Universal
High-strength all-round bonding — the universal choice for demanding screw, bearing and shaft-hub connections.
View product →

Important instructions

Not suitable for / Important notes
Not for use in pure oxygen or vapor contact. Some thermoplastics may be affected — compatibility testing recommended. Use Permabond A905 activator on inactive surfaces (stainless steel, zinc).
storage
Store at 5 to 25 °C. Anaerobic adhesives lose their reactivity upon contact with metal — do not touch the tip of the bottle to metal surfaces, do not pour the adhesive back into the bottle.

Which Permabond anaerobic adhesive is suitable for which application?

Permabond A129 in direct comparison with related products of the A series.

Permabond A129
Current product		Permabond A1044 →Permabond A1058 →Permabond A130 →
Application / StrengthThread sealant gelFast-curing, low pressureHigh viscosity paste, high pressureThreadlocker instead of pipe sealant
viscosityThixotropic, non-drip—300,000 mPa·s1,800 mPa·s
Maximum gap filling.0.5 mm0.5 mm0.5 mm0.12 mm
Breakaway torque12 N·m20 N·m8 N·m12 N·m
Further torque7 N·m10 N·m6 N·m7 N·m
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Thixotropic threaded connections, flange sealants, chemical resistance

Technical data for PERMABOND A129

All 20 product information 4 Performance at final strength 3 Physical properties 6 Curing values ​​4 Thermal properties 3
Product information
Manufacturer Permabond Engineering Adhesives Ltd
brand Permabond
Container 50 ml, 200 ml
Country of origin Italy
Performance at final strength
Shear strength (steel ISO10123) 12 MPa
Dielectric strength 11 kV/mm
Thermal conductivity 0.19 W/(mK)
Physical properties
Color orange
Chemical group Acrylic Unicomponent
Viscosity (adhesives) High viscosity >5000 mPas
Viscosity 2rpm 65000
Viscosity 20rpm 20000
fluorescence no
Curing values
Maximum gap width (mm) 0.5
Handling strength (M10 steel)@23°C 15 minutes
Functional strength (M10 steel) @ 23°C 1 hour
Final strength (M10 steel) @ 23°C 24 hours
Thermal properties
coefficient of thermal expansion 90 x 10-6 mm/mm/°C
Storage temperature (°C) 5-25
Operating temperature (°C) -55 to 150

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) 4
Permabond A129 - Technical Data Sheet DE.pdf
346 KB
Permabond A129 - Technical Data Sheet DE.pdf
346 KB
Permabond A129 - Technical Data Sheet EN.pdf
354 KB
Permabond A129 - Technical Data Sheet FR.pdf
297 KB
Safety Data Sheets (SDS) 3
Permabond A129 - Safety Data Sheet DE.pdf
327 KB
Permabond A129 - Safety Data Sheet EN.pdf
305 KB
Permabond A129 - Fiche de Sécurité FR.pdf
326 KB

Frequently asked questions about Permabond A129

Practical application and design questions — answered by SILITECH.

Permabond A129 is a thixotropic, non-drip, single-component acrylic thread sealant with a gap-filling capacity of up to 0.5 mm. This medium-strength thread sealant gel is suitable for coarse pipe threads and plumbing installations. Anaerobic adhesives cure in the absence of air and in contact with metal, making them ideal for tight-tolerance metallic joints.

Anaerobic adhesives like Permabond A129 remain liquid in the bottle (due to contact with air and oxygen) and only begin to harden after bonding under anaerobic conditions and metal-to-metal contact. Curing starts at the metal surface and progresses into the bond gap. The product cures quickly on steel and copper; on stainless steel and zinc, the Permabond A905 activator may be beneficial.

Yes — Permabond A129 is a thread sealant with moderate torque (12 N·m) and can be removed with standard tools. Designed for maintenance of pipe connections.

Permabond A129 does not have specific industry approvals such as WRAS or KTW (drinking water). For general industrial applications, the product is approved according to Permabond's internal specifications; however, product-specific testing prior to series production is recommended.

Permabond A129 typically achieves handling strength after 15 minutes and functional strength after 1 hour at 23 °C on M10 steel. Final strength is reached after 24 hours. On inactive surfaces (stainless steel, zinc) or at low temperatures, the curing time is extended—Permabond A905 activator accelerates the process.

Permabond A129 is a thread sealant gel (thixotropic, non-drip viscosity, 0.5 mm gap filling, 12 N·m breakaway torque). Permabond A1044 is a fast-curing pipe sealant (0.5 mm gap filling, 20 N·m breakaway torque) – fast-curing, low-pressure. Both belong to the anaerobic Permabond A series.

The choice depends on the application: Permabond A129 (gel thread sealant); Permabond A1044 (fast-curing pipe sealant); Permabond A1058 (high-viscosity pipe sealant); Permabond A130 (WRAS threadlocker). For inactive surfaces (stainless steel, zinc, aluminum), Permabond A905 activator be used to accelerate curing.

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Product specifications

Product information
Container 50 ml or 200 ml
Manufacturer Permabond Engineering Adhesives Ltd
brand Permabond
Country of origin Italy
Performance at final strength
Shear strength (steel ISO10123) 12 MPa
Dielectric strength 11 kV/mm
Thermal conductivity 0.19 W/(mK)
Physical properties
Color orange
Chemical group Acrylic Unicomponent
Viscosity (adhesives) High viscosity >5000 mPas
Viscosity 2rpm 65000
Viscosity 20rpm 20000
fluorescence no
Curing values
Maximum gap width (mm) 0.5
Handling strength (M10 steel)@23°C 15 minutes
Functional strength (M10 steel) @ 23°C 1 hour
Final strength (M10 steel) @ 23°C 24 hours
Thermal properties
coefficient of thermal expansion 90 x 10-6 mm/mm/°C
Storage temperature (°C) 5-25
Operating temperature (°C) -55 to 150
Keywords
Keywords
Thixotropic threaded connections, flange sealants, chemical resistance

Documents and datasheets

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