Product Description
LOCTITE® SI 5300™ provides the following product characteristics:
| Technology | Silicone |
|---|---|
| Chemical Type | Acetoxy silicone |
| Appearance (uncured) | Red paste |
| Components | One-component - requires no mixing |
| Thixotropic | Reduced migration of liquid product after application to substrate |
| Cure | Room temperature vulcanizing (RTV) |
| Application | Bonding or Sealing |
LOCTITE® SI 5300™ is generally used for sealing applications, but also for bonding and for high temperature protection. It is primarily used in industrial bonding/sealing applications, heating engineering, industrial ovens, household electrical and industrial heating equipment. This product is typically used in applications up to 350 °C.
Typical Properties of Uncured Material
| Specific Gravity @ 25 °C | 1.05 |
|---|---|
| Extrusion Rate, g/min | 250 |
| Test Conditions | Pressure 0.62 MPa, time 15 seconds, temperature 25 °C, Semco Cartridge |
| Flash Point | See SDS |
Typical Curing Performance
Surface Cure
Cured @ 22 °C, 50% RH
| Skin Over Time, min | 8 |
|---|
Cure Speed
The graph shows shear strength development over time at 22 °C / 50% RH on Aluminum, tested per ISO 4587. It plots '% of Full Cured Strength' vs. 'Cure Time' (2h to 8 weeks), illustrating increasing strength with cure duration.
Typical Properties of Cured Material
Cured for 21 days @ 22 °C / 50% RH
Physical Properties:
| Shore Hardness, ISO 868, Durometer A | 31 |
|---|---|
| Linear Shrinkage, % | 0.32 |
| Volume Shrinkage, % | 0.97 |
| Coefficient of Thermal Expansion, ISO 11359-2, K¯¹ | 330 × 10¯&sup6; |
| Coefficient of Thermal Conductivity ISO 8302, W/(m·K) | 0.63 |
| Tensile Strength, ISO 37, N/mm² | 1.6 |
| Tensile Modulus, ISO 37, N/mm² | 1.0 |
| Elongation, at break, ISO 37, % | ≥260 |
Electrical Properties:
| Surface Resistivity, IEC 60093, ρΩ | 51 |
|---|---|
| Volume Resistivity, IEC 60093, ΤΩ·cm | 1.1 |
Typical Performance of Cured Material
Adhesive Properties
After 21 days @ 22 °C / 50% RH
Tensile Lap Shear Strength, MPa:
| Substrate | Strength (MPa) |
|---|---|
| Aluminum (Grit blasted) | 0.96 |
| Aluminum (Alclad) | 0.97 |
| Mild steel | 0.31 |
| Mild steel (grit blasted) | 0.76 |
| Stainless steel | 0.48 |
| Nylon | 0.8 |
Environmental Resistance
Cured for 21 days @ 22 °C / 50% RH
Tensile Lap Shear Strength:
| Substrate | Strength (MPa) |
|---|---|
| Silicone rubber | 0.54 |
| Phenolic | 1.17 |
| PET | 0.63 |
| Zinc plated steel | 0.24 |
| Steel (e-coated) | 0.77 |
Hot Strength
Tested at temperature.
Graph Description: The graph illustrates 'Hot Strength' by plotting '% of Full Cured Strength' vs. 'Test Temperature (°C)' (-60 °C to 260 °C). It demonstrates a significant reduction in strength at elevated temperatures.
Heat Aging
Aged at temperature indicated and tested @ 22 °C
Graph Description: This graph shows the effect of heat aging on strength retention. The Y-axis is '% of Full Cured Strength' and the X-axis is 'Aging time (h)' up to 1000 hours. Two curves represent aging at 280 °C and 300 °C. Both curves show a significant drop in strength within the first 100 hours of aging, with further gradual decline thereafter.
Chemical/Solvent Resistance
Aged under conditions indicated and tested @ 22 °C.
| Environment | °C | 100 h | 500 h | 1000 h |
|---|---|---|---|---|
| Water/glycol 50/50 | 100 | 105 | 105 | 105 |
| Water/glycol 50/50 | 120 | 90 | 85 | 85 |
| ATF | 120 | 65 | 55 | 55 |
| Mineral Oil | 150 | 70 | 45 | 45 |
| Synthetic oil | 120 | 90 | 70 | 60 |
| Synthetic oil | 150 | 80 | 35 | 20 |
| Water | 60 | 110 | 120 | 105 |
| Water | 90 | 100 | 90 | 85 |
General Information
This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the Safety Data Sheet (SDS).
NOTE: This product is not recommended for contact with gasoline.
Directions For Use
- For best performance, bond surfaces should be clean and free from grease.
- Moisture curing begins immediately after the product is exposed to the atmosphere, therefore parts to be assembled should be mated within a few minutes after the product is dispensed.
- The bond should be allowed to cure before subjecting to heavy service loads.
- Excess material can be easily wiped away with non-polar solvents.
- For full automatic applications, a volumetric dispensing system is recommended.
Loctite Material Specification (LMS)
LMS dated April 02, 2011. Test reports for each batch are available for the indicated properties. LMS test reports include selected QC test parameters considered appropriate to specifications for customer use. Additionally, comprehensive controls are in place to assure product quality and consistency. Special customer specification requirements may be coordinated through Henkel Quality.
Storage
Store product in the unopened container in a dry location. Storage information may be indicated on the product container labeling.
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or greater than 28 °C can adversely affect product properties. Material removed from containers may be contaminated during use. Do not return product to the original container. Henkel Corporation cannot assume responsibility for product which has been contaminated or stored under conditions other than those previously indicated. If additional information is required, please contact your local Technical Service Center or Customer Service Representative.
Conversions
- (°C x 1.8) + 32 = °F
- kV/mm x 25.4 = V/mil
- mm / 25.4 = inches
- μm / 25.4 = mil
- N x 0.225 = lb
- N/mm x 5.71 = lb/in
- N/mm² x 145 = psi
- MPa x 145 = psi
- N·m x 8.851 = lb·in
- N·m x 0.738 = lb·ft
- N·mm x 0.142 = oz·in
- mPa·s = cP
Note
The information provided in this Technical Data Sheet (TDS) including the recommendations for use and application of the product are based on Henkel's knowledge and experience as of the date of this TDS. The product can have a variety of different applications as well as differing application and working conditions beyond Henkel's control. Therefore, Henkel is not liable for the suitability of its product for specific production processes, conditions, or intended applications and results. Henkel strongly recommends that users conduct their own prior trials to confirm suitability. Liability is excluded except if otherwise explicitly agreed or in relation to death or personal injury caused by negligence, or for mandatory product liability law.
Disclaimers
General disclaimers from Henkel regarding product suitability, user responsibility for testing, and limitations of liability are provided. Specific regional disclaimers may also apply. Trademark usage information is included.
Trademark Usage: Except as otherwise noted, all trademarks are trademarks of Henkel Corporation in the U.S. and elsewhere. ® denotes a trademark registered in the U.S. Patent and Trademark Office.
Reference 0.2
Contact Information
Henkel Americas: +860.571.5100
Henkel Europe: +49.89.320800.1800
Henkel Asia Pacific: +86.21.2891.8000
For the most direct access to local sales and technical support visit: www.henkel.com/industrial
