Bostik STR350A is a versatile product that serves as both an adhesive and a sealant. Based on Silyl Modified Polymer (SMP), it is ideal for making elastic constructive joints and elastic sealings.
Bostik STR350A Key Features
- Solvent, isocyanate, and PVC-free
- Excellent UV resistance and aging properties
- Neutral and odorless curing
Application
- Bostik STR350A is a high-quality SMP-based product, specifically developed for bonding and sealing in bus, caravan, and trailer construction.
- Adheres well without primer on clean, dry, dust and grease-free substrates of aluminum, stainless steel, galvanized steel, zinc, copper, brass, powder-coated metal, most lacquered metal surfaces, glass, PVC, polyester (GRP), painted and lacquered wood, etc.
- Not suitable for untreated polyethylene, polypropylene, and PTFE. For high adhesion demands, the use of Prep M is recommended to degrease and prepare the substrate surface.
- On plain, untreated wooden surfaces and other porous substrates, Prep G is recommended. Consult Bostik’s Technical Data Sheets for more details on Prep M and Prep G.
- For unlisted substrates and additional information, consult Bostik.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
TYPICAL PHYSICAL PROPERTIES |
|
Description |
Results |
Basic Material |
Silyl Modified Polymer (SMP) |
Curing Method |
Moisture |
Specific Gravity |
1.5 g/ml |
Skin Forming Time |
15 min. (70°F/20°C/50% R.H.) |
Open Time |
20 min. (70°F/20°C/50% R.H.) |
Curing Speed After 24 hrs |
2 mm (70°F/20°C/50% R.H.) |
Shore A Hardness |
50 (DIN 53505) |
Volume Change |
< 3% (DIN 52451) |
Green Strength |
800 Pa (Physica Rheometer MC100) |
Tensile Stress (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)
|
Solvent Percentage |
0% |
Isocyanate Percentage |
0% |
Temperature Resistance |
-40°F to 250°F (–40°C to 121°C) |
Application Temperature |
41°F to 95°F (5°C and 35°C) |
UV Resistance |
Excellent |