LOCTITE® AA 331 is a 1-part, toughened, acrylic-based structural paste with medium viscosity. Specially designed for bonding metal substrates, it’s perfect for DC motor assembly, magnet bonding, and bonding of pre-coated sheet metal. It cures in <2 minutes via activator, and you can expect high shear- and impact-strength with excellent environmental and chemical resistance. It requires activator LOCTITE® SF 7387.
Prevents fastener loosening on vibrating assemblies, e.g. pumps, gear boxes or presses
Works on all metals, including passive substrates
Suitable for use on most oil-coated, 'as-received' fasteners without cleaning
Can be disassembled with ordinary hand tools for easy service and maintenance
NSF/ANSI 61 certified
Ideal for heavy duty applications, such as studs into motor housings, where high strength is required
Prevents fastener loosening and leakage from shock and vibration
Permanent locking and sealing of threaded fasteners - removable with heat
Requires heat for disassembly
High temperature performance (up to 182°C / 360°F) and oil tolerance
Ideal for shafts, gears, pulleys and similar cylindrical parts
Operating temperature: -55°C to 230°C (-65°F to 450°F)
Ideal for shafts, gears, pulleys and similar cylindrical parts
High-strength on all metals, including passive substrates (e.g. stainless steel)
High temperature resistance
Fluorescent under UV for quality control
KIWA GASTEC QA AR 214 certified for hydrogen gas systems
Medium-strength for ease of disassembly
Ideal for parts that need frequent servicing
Secondary cure with activator
Works on active and passive substrates without primer
High-strength and oil resistance
Temperature resistant up to 180°C (355°F)
Fluorescent under UV for quality control
Low viscosity
High viscosity
Ideal for use with worn parts without re-machining
Registered to NSF Category P1
Suitable for retaining shims
Gap fill of 0.25 mm - 0.5 mm (0.01" - 0.02")
General-purpose structural bonder
Bonds metal to metal
Fixture time of < 3 minutes
Thixotropic for ease of application
Temperature resistance up to 120°C (248°F)
Multipurpose, multi-substrate structural bonder
Good impact resistance
Bonds dissimilar substrates
Activator required for cure
Non-corrosive
Bonds metal to metal
High temperature, chemical and environmental resistance
High shear and impact strength
Ultra-performance adhesive providing resistance up to 135°C (275°F) and fast fixture
ISO-10993 biocompatible
Ideal for quick repairs and high speed production applications
Unique, patented formula with reduced hazardous ingredients
Assembles difficult-to-bond materials using LOCTITE SF 770 or SF 7701 primer
Industrial instant adhesive
Bonds acidic surfaces
For difficult-to-bond materials
Medium viscosity
Formulated to provide flexible bondlines
Assembles difficult-to-bond plastics when LOCTITE SF 7701 primer used
Low viscosity
ISO-10993 biocompatible
Ideal for bonding porous or absorbent materials, e.g. paper, leather and fabrics
