Retaining Compounds

LOCTITE® 638 is a high strength, fast curing, general purpose retaining compound.
LOCTITE® 638 is designed for the bonding of cylindrical fitting parts, particularly with narrow bond gaps approaching 0.25 mm. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. It not only works on active metals but also on passive substrates, exhibiting robust cure performance. The product offers high-temperature performance and good oil tolerance, and tolerates minor surface contaminants.
Tolerates minor contaminants, including industrial oils
High strength on all metals, including passive substrates (e.g. stainless steel)
High temperature resistance
Ideal for shafts, gears, pulleys and similar cylindrical parts
DVGW Approval (EN 751-1): NG-5146AR0619
P1 NSF Reg. No.: 123010
WRAS Approval (BS 6920): 0511518

LOCTITE® 648 is a low viscosity, high strength retaining compound with high temperature resistance. Ideal for retention of parts with a clearance or interference fit.
LOCTITE® 648 is designed for the bonding of cylindrical fitting parts. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. It exhibits a robust curing performance. The product also works on passive substrates and offers high-temperature performance and good oil tolerance.
High temperature resistance
Proven to be tolerant of minor contamination due to industrial oils
Ideal for retention of parts with a clearance or interference fit
High strength on all metals, including passive substrates (e.g. stainless steel)
DVGW Approval (EN 751-1): NG 5146C00236
P1 NSF Reg. No.: 148350
WRAS Approval (BS 6920): 0808532

Retaining Compound - medium strength. If disassembly is required. Ideal for parts that need subsequent dismantling.
LOCTITE® 641 is designed for the bonding of cylindrical fitting parts, particularly where disassembly is required for servicing operations. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. Ideal for parts that need subsequent dismantling, i.e. retention of bearings on shafts and in housings.
Ideal for parts that need subsequent dismantling, i.e. retention of bearings on shafts and in housings

LOCTITE® 638 is a high strength, fast curing, general purpose retaining compound.
LOCTITE® 638 is designed for the bonding of cylindrical fitting parts, particularly with narrow bond gaps approaching 0.25 mm. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. It not only works on active metals but also on passive substrates, exhibiting robust cure performance. The product offers high-temperature performance and good oil tolerance, and tolerates minor surface contaminants.
Tolerates minor contaminants, including industrial oils
High strength on all metals, including passive substrates (e.g. stainless steel)
High temperature resistance
Ideal for shafts, gears, pulleys and similar cylindrical parts
DVGW Approval (EN 751-1): NG-5146AR0619
P1 NSF Reg. No.: 123010
WRAS Approval (BS 6920): 0511518

Bondloc B603 is a high strength anaerobic retaining compound suitable for permanent bonds. B603 is oil tolerant and works well on parts that have not been cleaned or have a oil residue on them.
The product cures when confined in the absence of air between close-fitting metal surfaces.
Ideal for all types of cylindrical parts, such as bearings, gears, splines, pulleys and keyways.
Colour: Green
Viscosity: 100 - 150cps
Gap Fill: 0.15mm
Static Strength on Steel: Less than 22Nmm2 (ISO 4587)
Full Cure Time: 24 hours
Fixture Time:Less than 15 mins @ 20°C
Min Max Temp: -55°C - +150°C

Bondloc B641 is a medium strength retaining compound, it cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration.
Designed for the bonding of cylindrical fitting parts where disassembly is required for servicing and repair operations.
Ideal for parts that need subsequent dismantling, i.e. retention of bearings on shafts and in housings.
Colour: Yellow
Viscosity: 400 - 800cps
Gap Fill: 0.1mm
Static Strength on Steel: Greater Than 6Nmm2 (ISO 4587)
Fixture Time: Less than 5 mins with activator
Full Cure Time: 12 hours
Min Max Temp: -55°C - +150°C

Bondloc B660 is a high strength retaining compound designed for the bonding of cylindrical fitting parts.
The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration.
Bondloc B660 has excellent gap fill characteristics and enables the re-use of worn parts including Keys, splines and bearing seats.
Colour: Silver Grey
Viscosity: Paste
Gap Fill: 0.5mm
Static Strength on Steel: Greater Than 18Nmm2 (ISO 4597)
Fixture Time: Less than 5 mins with activator
Full Cure Time: 2 - 6 hours
Min Max Temp: -55°C - +150°C