Loctite 5188 Gasket Sealant User Manual

Product Overview

The Loctite 5188 Gasket Sealant is an anaerobic flange sealant designed for rigid iron, aluminum, and steel flanged mating surfaces. It cures when confined in the absence of air between close-fitting metal surfaces. This product provides a flexible, solvent-resistant seal that will not tear or degrade. It is ideal for sealing close-fitting joints between rigid metal faces and flanges.

Figure 1: A red tube of Loctite 5188 Flange Sealant, 50ml size, with white cap and nozzle. The label clearly shows 'LOCTITE 5188 FLANGE SEALANT' and 'NET 1.69 FL. OZ. (50 ml)'.

Safety Information

Always read the Material Safety Data Sheet (MSDS) prior to use. This product contains chemicals that may be harmful if misused. Keep out of reach of children. Use in a well-ventilated area.

• Avoid contact with skin and eyes. In case of contact, rinse immediately with plenty of water and seek medical advice.
• Do not ingest. If swallowed, do not induce vomiting; call a physician immediately.
• Wear appropriate personal protective equipment (PPE) such as gloves and safety glasses.
• Store in a cool, dry place away from direct sunlight and heat sources.

Setup and Surface Preparation

1. Clean Surfaces: Ensure all mating surfaces are clean, dry, and free from oil, grease, and old gasket material. Use a suitable solvent cleaner if necessary.
2. Roughen Surfaces (Optional): For best adhesion, lightly abrade smooth surfaces with an abrasive pad or fine sandpaper, then clean again.
3. Check Fit: Verify that the parts to be sealed fit closely together. This product is designed for close-fitting metal surfaces.

Operating Instructions (Application)

1. Dispense Product: Apply a continuous bead of Loctite 5188 to one of the flange faces. Ensure complete coverage around all bolt holes and mating surfaces.
2. Assemble Parts: Assemble the components immediately after application. Light clamping is recommended to ensure intimate metal-to-metal contact.
3. Cure Time:
   • Fixture Time: The product will fixture (become tack-free) in approximately 20 minutes at room temperature (22°C / 72°F).
   • Full Cure: Full cure is typically achieved within 24 hours.
   • Note: Cure speed can vary depending on the substrate material, bondline gap, and temperature. Active metals like brass or copper will cure faster, while passive substrates like stainless steel may require an activator (e.g., Loctite 7649) for faster cure.
4. Testing: Allow sufficient cure time before subjecting the assembly to operational pressures or temperatures.

Maintenance and Storage

• Storage: Store the product in its original container in a cool, dry location. Optimal storage temperature is between 8°C and 21°C (46°F and 70°F).
• Shelf Life: Refer to the product packaging for specific shelf life information.
• Cleanup: Uncured product can be cleaned with organic solvents. Cured product must be removed mechanically (e.g., scraping).
• Disposal: Dispose of product and packaging in accordance with local, regional, national, and international regulations.

Troubleshooting

Specifications

• Product Type: Anaerobic Gasket Sealant
• Model Number: 1253203
• Volume: 50 mL (1.69 fl. oz.)
• Color: Red
• Temperature Range: -65°F to 300°F (-54°C to 149°C)
• Fixture Time: Approximately 20 minutes (on steel)
• Full Cure Time: 24 hours
• Flexibility: Highly Flexible
• Manufacturer: Loctite (Henkel)
• Country of Manufacturer: United States

Support Information

For technical assistance, product inquiries, or safety data sheets, please visit the official Loctite website or contact their customer support.

Loctite Official Website: www.loctite.com

Amazon Brand Store: Visit the Loctite Store on Amazon