Loctite SI 5990 - 100 ml copper, silicone OHS seal

Code: 981693
Not rated
18,11 € –17 %
Loctite SI 5990 - 100 ml copper, silicone OHS seal
18,11 € –17 % 14,98 € / pcs 18,13 € incl. VAT
In stock (28 pcs)
Delivery to:
06/08/2025
Delivery offer
Loctite SI 5990, IDH 1721241, is a copper silicone sealant resistant to temperatures from -60 to +350 °C, suitable for metal, plastic and cast iron flanges, without harmful additives, for OHS applications.

Detailed information

Delivery throughout the EU

Product detailed description

Loctite SI 5990 (formerly known as Loctite 5990, IDH 1721241) is a one-component, moisture-curing silicone sealant. It is primarily intended for sealing and bonding metal parts in high temperature environments. This product is non-corrosive and provides excellent temperature resistance up to 350°C, making it ideal for demanding industrial applications. Loctite SI 5990 prevents dripping and is suitable for electrical insulation applications.

Benefits:

  • High temperature resistance up to 350 °C
  • Non-corrosive and safe for various surfaces, including metals and plastics
  • liquids
  • Suitable for sealing and bonding larger joints up to 0.25 mm
  • Electrically insulating product, ideal for applications requiring protection against temperature and chemical influences

Technical parameters:

  • temperature)
  • Chemical type: Silicone elastomer
  • Appearance: Copper paste
  • Density: 1.04 g/cm?
  • Viscosity: Thixotropic paste (prevents dripping)
  • Temperature range: -60
  • Skin formation time: 25 minutes
  • Processing time: 40 minutes
  • Full cure: 24 hours at 25 °C and 50% relative humidity
  • Shore A hardness: 27
  • Elongation at break: 27 N/mm²
  • Maximum gap: 0.25 mm

Application: Loctite SI 5990 is suitable for a wide range of applications, especially where high temperature and chemical resistance is required:

  • Automotive industry: Engine cover sealing
  • Industrial machinery: Flange sealing and machine parts exposed to vibration and high temperatures
  • Repair applications: Ideal for sealing during maintenance and repair of equipment
  • Electrical applications: Thanks to its electrical insulating properties, it can also be used for electrical insulation applications
  • Before curing: Copper thixotropic paste, rapid formation of a surface layer
  • After curing: Elastic joint that remains flexible even at high temperatures and chemical stress

Use when applying:

    For thorough degreasing and removal of dirt, use Loctite SF 7070 cleaner, which ensures gentle .

    Removing old material:For easy and quick removal of old sealant or adhesive residues, apply Loctite SF 7200, which effectively breaks up the bond and facilitates material removal.

  1. Work:After application is complete, use Loctite SF 78. This biodegradable cleaner removes oils, greases and other contaminants.

Product table for easy selection of the appropriate silicone adhesive

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