Loctite 221 50ml Loctite Authorized Distributor

Loctite 221 50ml

• Strength : Low
• Viscosity : 100 - 150 mPa.s (cP) Brookfield
• Key Substrates: Metal: Brass, Metal: Steel, Metal: Steel - Stainless Steel
• Color : Purple
• Curing Type : Anaerobic
• Application : Threadlocking

LOCTITE® 221 is a methacrylate-based threadlocking adhesive designed for low strength applications on small threads up to a maximum size of M12. Typical fixture times are 25, 20 and 210 min on steel, brass and stainless steel respectively. Offering low viscosity and a breakaway torque of 8.5 Nm, the product is designed for fasteners that require easy disassembly with standard hand tools.

• Low strength
• Low viscosity
• Designed for small threads
• Various pack sizes

LOCTITE® 221™ is designed for the locking and sealing of
threaded fasteners which require easy disassembly with
standard hand tools. The product cures when confined in the
absence of air between close fitting metal surfaces and
prevents loosening and leakage from shock and vibration.
Particularly suitable for applications such as adjustment of
set screws, small diameter or long engagement length
fasteners, where easy disassembly is required without
shearing the screw.

TYPICAL CURING PERFORMANCE

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The graph
below shows the breakaway strength developed with time on
M10 black oxide bolts and steel nuts compared to different
materials and tested according to ISO 10964.

Cure Speed vs. Bond Gap

The rate of cure will depend on the bondline gap. Gaps in
threaded fasteners depends on thread type, quality and size.
The following graph shows shear strength developed with time
on steel pins and collars at different controlled gaps and tested
according to ISO 10123.

Cure Speed vs. Temperature

The rate of cure will depend on the temperature. The graph
below shows the breakaway strength developed with time at
different temperatures on M10 black oxide bolts and steel nuts
and tested according to ISO 10964.

Cure Speed vs. Activator

Where cure speed is unacceptably long, or large gaps are
present, applying activator to the surface will improve cure
speed. The graph below shows the breakaway strength
developed with time on M10 zinc dichromate steel nuts and
bolts using Activator 7471™ and 7649™ and tested according
to ISO 10964