SW 820 — Thread sealant for metal fittings
Professional alternative to PTFE tape and hemp for pneumatic lines and threaded fittings.
General description:
SW 820 is an anaerobic paste sealant specifically designed for use on metal threaded fittings in the presence of gases, CFCs, oils, fuels, brake fluids and compressed air.
It is the ideal replacement for PTFE tape and hemp, thanks to its penetration capacity and durable sealing.
Once polymerised, it forms a tough film resistant to vibration, shock and thermal excursions.
The product has a low coefficient of friction to ease assembly and a thixotropic structure that prevents run-off during curing.
SW 820 is recommended by Faiveley Transport for use on railway rolling stock and is compliant with Trenitalia category 006 251.
SW 820 is ideal for sealing metal threaded fittings, in particular:
Pneumatic lines on railway vehicles
Systems subject to vibration, shock and temperature variations
Fittings exposed to technical liquids, fuels, oils and refrigerants
Do not apply to plastics or painted surfaces without prior assessment. For use on non-metallic materials, contact BBTS technical support.
Composition
Anaerobic methacrylate resin
Colour
Green
Viscosity at 25°C
10–20 mPa·s
Specific gravity
1.1 g/ml
Detection
UV-fluorescent
Flash point
10
Shelf life
12 months at 25°C
Max. thread diameter / Max. joint tolerance
M5 / 0.07 mm
Handling time
10–20 minutes
Functional cure
1–3 hours
Full cure
3–6 hours
Breakaway torque
10–25 Nm
Prevailing torque
25–40 Nm
Shear strength
8–12 N/mm²
Temperature resistance
−55°C / +150°C
Thoroughly clean the surfaces with a suitable cleaner.
Apply a sufficient amount of SW 820 until the joint is completely filled. Assemble normally and wait for polymerisation (1–3 hours for functional strength, 24–36 hours for complete).
To facilitate disassembly, heat the joint to 150–250°C.
Remove polymerised residues mechanically and finish with acetone.
For safety information, refer to the Safety Data Sheet (SDS) available on request.
The product can be ordered in the following packaging:
75 ml bellows bottle – box of 10 pcs
