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Technical Data
Typical values, not a specification. The technical data sheet (TDS) is binding.
Product Information
- Manufacturer
- Permabond Engineering Adhesives Ltd
- Brand
- Permabond
- Container
- 50 ml, 200 ml, 1 l
- Country of origin
- Italy
- UFI (Unique Formula Identifier)
- WSJ0-Q0C3-400U-KMT9
Performance at Full Cure
- Shear strength (steel ISO10123)
- 12 MPa
- Dielectric Strength
- 11 kV/mm
- Thermal conductivity
- 0.19 W/(m.K)
- Torque strength (M10 steel ISO10964) Breakloose
- 10 Nm
- Torque strength (M10 steel ISO10964) Prevailing
- 7 Nm
Physical Properties
- Color
- white
- Chemical group
- Methacrylate ester
- Viscosity (adhesives)
- High viscosity >5000 mPas
- Viscosity 2rpm
- 40000
- Viscosity at 20 rpm
- 6000
- Fluorescence
- Yes
Curing values
- Maximum gap fill (mm)
- 0.5
- Handling strength (M10 steel)@23°C
- 45 minutes
- Functional strength (M10 steel)@23°C
- 2 hours
- Ultimate strength (M10 steel)@23°C
- 24 hours
Product Approvals
- WRAS Drinking Water Approval
- warm + cold (up to 85 °C)
- KIWA Gastec (Gas)
- Yes
- KIWA Water (Warm + Cold drinking)
- Yes
- KIWA Hydrogen
- Yes
Thermal Properties
- Coefficient of thermal expansion
- 90 x 10-6 mm/mm/°C
- Storage Temperature (°C)
- 5-25
- Operating temperature (°C)
- -55 to 150
Product Description
Permabond A131 is a premium methacrylate ester-based thread sealant — one of the world's most comprehensive anaerobic approvals with KIWA Gas, KIWA Hot/Cold Water, KIWA Hydrogen, and WRAS Drinking Water. The universal choice for demanding building services engineering.
Unlike conventional acrylic anaerobic sealants, A131 utilizes methacrylate ester chemistry and was specifically developed for use as a multi-media thread sealant. Its white paste consistency does not drip from vertical threads.
KIWA certification covers gas (Gastec), drinking water (both hot and cold), and hydrogen (H₂) — a combination unmatched by any other anaerobic thread sealant at this depth. The additional WRAS approval allows for use with drinking water up to 85 °C. Medium torque values (breakaway 10 N·m, further 7 N·m) permit subsequent disassembly for maintenance — important in utility and plant engineering.
One of the world's most comprehensive anaerobic approvals — KIWA Gastec (gas), KIWA Water (hot and cold drinking water), KIWA Hydrogen (hydrogen), plus WRAS for drinking water up to 85 °C. Permabond A131 is the premium choice for multi-media fittings in building services engineering.
What distinguishes Permabond A131
What is Permabond A131 used for?
Processing
Recommended accessories
Important Notes
Which Permabond anaerobic adhesive for which application?
Permabond A131 in direct comparison with related products of the A series.
Permabond A131 Current Product | Permabond A129 → | Permabond A118 → | Permabond LH050 → | |
|---|---|---|---|---|
| Application / Strength | Premium methacrylate thread seal — for gas, drinking water, hydrogen | Acrylic chemistry instead of methacrylate | High pressure burst-proof | Low-strength methacrylate paste |
| Viscosity | Paste consistency (thixotropic) | Gel | 300,000 mPa·s | 250,000 mPa·s |
| Max. gap fill. | 0.5 mm | 0.5 mm | 0.5 mm | 0.5 mm |
| Breakaway Torque | 10 N·m | 12 N·m | 58 N·m | 4 N·m |
| Prevailing torque | 7 N·m | 7 N·m | 6 N·m | 33 N·m |
Frequently asked questions about Permabond A131
Practical application and design questions — answered by SILITECH.
Permabond A131 is a methacrylate ester (anaerobic) with a paste consistency (thixotropic) and a viscosity suitable for gaps up to 0.5 mm. It is a premium thread sealant with multi-approval certifications – KIWA Gas + Hot/Cold Drinking Water + Hydrogen + WRAS. Anaerobic adhesives cure in the absence of air and in contact with metal – ideal for tight-tolerance metallic joints.
Anaerobic adhesives like Permabond A131 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 A131 is a thread sealant with moderate torque (10 N·m) and can be removed with standard tools. Designed for maintenance of pipe connections.
Permabond A131 is approved according to KIWA Gastec (Gas), KIWA Water (Warm & Cold drinking), KIWA Hydrogen, and WRAS Drinking Water Approval (hot and cold up to 85 °C) . These certifications qualify the product for the respective specified applications—such as direct contact with drinking water in the case of WRAS and KTW approvals.
Permabond A131 typically reaches 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 A131 is a premium methacrylate thread sealant for use with gas, drinking water, and hydrogen (paste consistency (thixotropic), 0.5 mm gap filling, 10 N·m breakaway torque). Permabond A129 is a medium-strength gel (gel, 0.5 mm, 12 N·m breakaway torque) using acrylic chemistry instead of methacrylate. Both belong to the anaerobic Permabond A series.
The choice depends on the application: Permabond A131 (premium thread sealant methacrylate — gas, drinking water, hydrogen); Permabond A129 (medium strength gel); Permabond A1058 (high viscosity paste); Permabond LH050 (low strength paste). For inactive surfaces (stainless steel, zinc, aluminum), Permabond A905 activator be used to accelerate curing.