LOCTITE SI 587
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Flexible Fipg Sealant Formulation
- Thixostropic Sealant Formulation
- Automotive Sealing Application
Product Description
LOCTITE® SI 587™ is a one-component, room-temperature-vulcanizing oxime silicone gasket maker and sealant supplied as a metallic blue thixotropic paste. It is designed for formed-in-place gasketing, gasket dressing, and sealing applications in plant maintenance and OEM equipment, including valve covers, rocker covers, oil pans, water pumps, end seals, intake manifolds, rear axle housings, and fabricated silicone-gasket repair. The cured elastomer provides flexibility, shock absorption, adhesion to a broad range of substrates, and resistance to typical automotive engine oils.
Key features
- Flexible formed-in-place gasketing: Creates an elastomeric seal that supports load bearing, movement, and shock absorption.
- Thixotropic one-component paste: Requires no mixing and helps limit migration after application.
- Automotive oil resistance: Designed for demanding engine and equipment gasketing applications at temperatures up to 260°C.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
Typical properties of the uncured material; values are reference data rather than guaranteed product specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Technology | Silicone | — | Uncured material |
| Chemical type | Oxime silicone | — | Uncured material |
| Appearance | Metallic blue paste | — | Uncured material |
| Components | One component | — | No mixing required |
| Rheology | Thixotropic | — | Reduced migration after application |
| Cure mechanism | Room-temperature vulcanizing | RTV | Moisture cure |
| Specific gravity | 1.28–1.33 | — | At 25°C |
| Extrusion rate | 250–600 | g/min | 0.62 MPa pressure, 15 seconds, 25°C; Semco cartridge |
| Flow | ≤12.7 | mm | ISO 7390; after 2 minutes at 25°C |
| Tack-free time | 10–50 | min | Cured at 25°C and 50 ± 5% RH |
| Density | 1.31 | g/cm³ | SDS value |
| Flash point | >94 | °C | SDS value |
After-processing / final-state properties
Typical cured-material properties depend on cure time, temperature, humidity, joint geometry, substrate preparation, and test method.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength | ≥1.6 | N/mm² | ISO 37; cured 7 days at 25°C and 50 ± 5% RH |
| Elongation at break | ≥350 | % | ISO 37; cured 7 days at 25°C and 50 ± 5% RH |
| Shore hardness | 26–40 | Shore A | ISO 868; cured 7 days at 25°C and 50 ± 5% RH |
| Maximum typical application temperature | 260 | °C | Typical application limit stated in TDS |
| Full-performance development | 72 | h | Under normal ambient moisture-cure conditions |
