LOCTITE 5039
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Deep Light-Cure Gasketing
- Shadow-Area Moisture Cure
- Continuous-Bead Semi-Flowable Application
Product Description
LOCTITE SI 5039 is a one-component, semi-flowable acetoxy silicone adhesive and sealant with UV/visible primary cure and secondary moisture cure for shadowed areas. Its flow characteristics facilitate even knit lines and continuous beads for cure-in-place gasketing, bonding and sealing. Under specified 365 nm exposure, the material reaches a tack-free surface in 20 seconds or less and a light-cure depth of at least 10 mm after 60 seconds. The light-yellow translucent paste forms an elastomer with Shore A hardness of 32 to 48 and elongation of at least 150% after the stated cure.
Key features
- Deep light cure: Depth of cure is at least 10 mm after 60 seconds at 70 mW/cm^2 and 365 nm.
- Shadow-area cure: Atmospheric moisture provides the secondary cure mechanism in shadowed regions.
- Continuous-bead flow: Semi-flowable behavior facilitates even knit lines and continuous beads.
Applications
Cure-in-place gasketing, bonding and sealing where light cure and moisture cure in shadowed areas are useful.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Chemical Properties
Mechanical Properties
Electrical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Light yellow, translucent paste | Uncured; LMS | |
| Specific gravity | 1.05 | Typical; 25 deg C | |
| Solids/non-volatile content | 96.8 | % | Typical; uncured |
| Aspect ratio | 0.85 | height/width | Typical; measured at 60 seconds |
| Flow | 15.2 | mm | Typical; ISO 7390 |
| Extrusion rate | 150 to 320 | g/min | LMS; 0.6 MPa; 15 s; 25 deg C; Semco #440 nozzle |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 32 to 48 | Shore A | LMS; ISO 868; 70 mW/cm^2 at 365 nm for 60 s/side, then 72 h at 23 deg C/50% RH |
| Elongation at break | >=150 | % | LMS; ISO 37; 70 mW/cm^2 at 365 nm for 60 s/side, then 72 h at 23 deg C/50% RH |
| Tensile strength | >=1.0 | N/mm^2 | LMS; ISO 37; 70 mW/cm^2 at 365 nm for 60 s/side, then 72 h at 23 deg C/50% RH |
| Tear strength | 8.3 | N/mm | Typical; ISO 34-1, Die C; stated light cure plus 72 h at 23 deg C/50% RH |
| Volume shrinkage | 0.44 | % | Typical; ASTM D 792; stated light cure plus 72 h at 23 deg C/50% RH |
| Dielectric breakdown strength | 19.1 | kV/mm | Typical; IEC 60243-1; stated light cure plus 72 h at 23 deg C/50% RH |
| Volume resistivity | 6.7 x 10^14 | ohm cm | Typical; IEC 60093; stated light cure plus 72 h at 23 deg C/50% RH |
