BOSTIK STR-350A
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Fast 15-Minute Skin Formation
- High-Elongation Elastic Joint
- Excellent UV Resistance
Product Description
Bostik STR350A combines adhesive and sealant functions in a one-component silyl modified polymer (SMP) material for elastic constructive joints and sealing. It forms a skin in 15 minutes and has a 20-minute open time at 20 deg C and 50% RH, with approximately 2 mm cure development after 24 hours under the same conditions. The cured material reaches Shore A 50 and 400% elongation at break, while UV resistance is rated Excellent. STR350A is developed for bonding and sealing in bus, caravan, and trailer construction, including general bonding and panel assembly.
Key features
- 15-Minute Skin Formation: Skin forming time is 15 minutes at 20 deg C and 50% RH.
- High-Elongation Elastic Joint: Cured elongation at break is 400%, supporting the product's elastic joint role.
- Excellent UV Resistance: Cured UV resistance is rated Excellent.
Applications
Transportation joint bonding and sealing, including bus, caravan, trailer, general bonding, and panel assembly.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Thermal Properties
Additional Information
As-supplied and application properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Basic material | Silyl Modified Polymer (SMP) | As supplied | |
| Curing method | Moisture | One-component cure mechanism | |
| Specific gravity | 1.5 | g/ml | As supplied |
| Skin forming time | 15 | min | 20 deg C and 50% RH |
| Open time | 20 | min | 20 deg C and 50% RH |
| Curing speed after 24 hrs | 2 | mm | 20 deg C and 50% RH |
| Application temperature | 5 to 35 | deg C | Extrusion/application range |
| Shelf life | 12 | months | Original unopened container; dry place at 5 to 35 deg C |
Final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore A hardness | 50 | DIN 53505 | |
| Volume change | < 3 | % | DIN 52451 |
| Tensile stress at 100% | 375 | psi | DIN 53504 / ISO 37 |
| Tensile strength at break | 350 | psi | DIN 53504 / ISO 37 |
| Elongation at break | 400 | % | DIN 53504 / ISO 37 |
| Shear strength | 247 | psi | DIN 53283 / ASTM D1002; Al-Al; 2 mm adhesive thickness; 50 mm/min test speed |
| Temperature resistance | -40 to 121 | deg C | Cured material temperature-resistance range |
| UV resistance | Excellent | Cured material |
