SP 812 — Low-viscosity anaerobic sealant
Penetrates deeply and seals microporosities on metals. Resists vibration, chemicals and pressures up to 10 bar.
General description:
SP 812 is a low-viscosity anaerobic sealant designed to penetrate capillarily into microporosities of metal-to-metal couplings, such as welded joints or threads with narrow tolerances.
Its infiltration capability makes it ideal for sealing studs, safety valves and threaded fittings, even in the presence of thermal or mechanical stress.
The product offers resistance to vibration, gas, oils, brake fluids, refrigerants, water/glycol and fuels, ensuring tightness even under critical operating conditions. It is not suitable for use on joints in contact with pure oxygen or steam.
Approved for railway applications such as “dead-man” devices, it is a reliable solution wherever precise, long-lasting sealing is required.
SP 812 is recommended for:
Sealing microporosities on steel/steel
Studs of oil-immersed disconnectors on metal structures
Cast-iron safety valves (up to 10 bar)
Pneumatic devices in railway vehicles
Metal threads with small clearance (up to M5)
It is suitable for use with water, compressed air, LPG, methane, oils and chemical liquids. Do not use on plastics or painted surfaces without prior evaluation.
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. 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 unpainted surfaces with a suitable cleaner before application.
Apply SP 812 in a quantity sufficient to completely fill the joint. Assemble normally and allow polymerisation.
Disassembly can be facilitated by heating the joint to 150–250°C.
Remove any residues mechanically and with acetone.
For safety information, refer to the Safety Data Sheet (SDS) available on request.
The product can be ordered in the following packaging:
50 ml bottle – box of 10 pcs
