Retaining Compounds

Retaining compounds are high strength anaerobic adhesives used for a variety of applications such as securing cylindrical parts into shafts. They create a permanent connection between two materials, such as bonding roller bearings in bearing housing.

How do retaining compounds work?

Retaining compounds are applied as a liquid. Because of their high viscosity, the thickness and strength increases as the liquid cools to room temperature. Retaining compounds can be used for bonding metal surfaces together or for filling voids. They eliminate fretting corrosion and prevent the roughening of surfaces that lead to the need for replacement parts. Due to their high strength, retaining compounds are best used in parts that require infrequent dismantling.

Types of retaining compounds

Retaining compounds are available in a range of strengths and cure times. Depending on the application, maximum operating temperature, chemical composition and chemical ingredients should be considered before you choose retaining compounds for your job. For parts that require a permanent bond, high-strength retaining compounds are recommended. Medium-strength retaining compounds should be used when parts will need to be taken apart.


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Description Price Trade Name Application Colour Chemical Ingredients Product Form Package Size Cure Time Strength Maximum Operating Temperature Chemical Composition Odour Operating Temperature Range Special Features Specific Gravity
RS Stock No. 821-1425
Mfr. Part No.Loctite 638
BrandLoctite
$26.82
Each
units
Loctite 638 Bonding Green Acrylic Acid, Cumene Hydroperoxide, Dimethacrylate Ester, Hydroxyalkyl Methacrylate, Methacrylate Monomer, Methacrylic Acid, Polyglycol Dimethacrylate, Polyurethane Methacrylate Resin, 2-Hydroxyethyl Methacrylate Liquid 10 ml 1 week, 7 days, 15 min, 24 h High +150°C Acrylic Acid, Cumene Hydroperoxide, Dimethacrylate Ester, Hydroxyalkyl Methacrylate, Methacrylate Monomer, Methacrylic Acid, Polyglycol Dimethacrylate, Polyurethane Methacrylate Resin, 2-Hydroxyethyl Methacrylate - -55 → +150 °C - -
RS Stock No. 373-1498
Mfr. Part No.LOCTITE® 648
BrandLoctite
$123.53
Each
units
Loctite 648 Bonding, Retaining Green - Liquid 50 ml 3 → 6 h High +175°C Urethane Methacrylate - -55 → +175 °C - -
RS Stock No. 514-537
Mfr. Part No.234795
BrandLoctite
$120.31
Each
units
Loctite 638 Bonding, Retaining Green Urethane Methacrylate Liquid 50 ml 5 h High +150°C Urethane Methacrylate - -55 → +150 °C - -
RS Stock No. 496-136
Mfr. Part No.229232
BrandLoctite
$105.55
Each
units
Loctite Quick-Metal 660 Bonding, Retaining Grey Urethane Methacrylate Gel 50 ml 20 h High +150°C Urethane Methacrylate - -55 → +150 °C - -
RS Stock No. 787-7393
Mfr. Part No.620
BrandLoctite
$117.70
Each
units
Loctite 620 Retaining Green Methacrylate Liquid 50 ml 80 min High +230°C Methacrylate - -55 → +230 °C - -
RS Stock No. 496-057
Mfr. Part No.135522
BrandLoctite
$137.21
Each
units
Loctite 641 Bonding, Retaining Yellow Methacrylate Liquid 50 ml 6 → 24 h Medium +150°C Methacrylate - -55 → +150 °C - -
RS Stock No. 908-2770
BrandRS PRO
$21.19
Each
units
R41 Retaining Green Bis(Isopropyl)Naphthalene, Cumene Hydroperoxide, Hydroxyalkyl Methacrylate, Polyglycol Dimethacrylate Liquid 50 ml 15 → 30 min Medium +150°C Bis(Isopropyl)Naphthalene, Cumene Hydroperoxide, Hydroxyalkyl Methacrylate, Polyglycol Dimethacrylate Sweet -55 → +150 °C Bearing Fit Retainer 1.08
RS Stock No. 787-7383
Mfr. Part No.601
BrandLoctite
$96.20
Each
units
Loctite 601 Retaining Green Methacrylate Liquid 50 ml 25 min High +150°C Methacrylate - -55 → +150 °C - -
RS Stock No. 908-2792
BrandRS PRO
$21.19
Each
units
R38 Retaining Green Acrylic Acid, Acrylic Resin, Cumene, Cumene Hydroperoxide, N, N-Dimethyl-P-Toluidine, Polyglycol Dimethacrylate, 1-Acetyl-2-Phenylhydrazine, 2, 2-Bis(Acryloyloxymethyl)Butyl Acrylate, 2-Hydroxypropyl Methacrylate Liquid 50 ml 24 h High +150°C Acrylic Acid, Acrylic Resin, Cumene, Cumene Hydroperoxide, N, N-Dimethyl-P-Toluidine, Polyglycol Dimethacrylate, 1-Acetyl-2-Phenylhydrazine, 2, 2-Bis(Acryloyloxymethyl)Butyl Acrylate, 2-Hydroxypropyl Methacrylate Sweet -55 → +150 °C High Strength 1.08
RS Stock No. 330-3964
Mfr. Part No.135280
BrandLoctite
$150.11
Each
units
Loctite 603 Bonding, Retaining Green Urethane Methacrylate Liquid 50 ml 10 h High +150°C Urethane Methacrylate - -55 → +150 °C - -