How to glue polysulfide rubber
How to bond polysulfide rubber or polysulfide elastomers
The key factor distinguishing polysulfide rubber from other types of rubber is the high sulfur content in the polymer backbone. The main performance advantages of polysulfide elastomers are their excellent chemical resistance and near-impermeability to most gases, hydrocarbon solvents, and moisture. Combined with their high flexibility and long-term resistance to both polar and nonpolar solvents, they are particularly suitable for sealing applications that demand exceptional barrier and resistance properties. Other features include good low-temperature performance as well as resistance to UV and ozone.
Polysulfide rubber is widely used in various industries due to its unique properties. It is applied in propeller binders, gas bladders, sealants, and valves, where it provides excellent chemical resistance and sealing performance under varying pressures and temperatures. It is also used for gaskets and washers, valued for its chemical resistance and tightness. In construction, it is employed in building sealants and window seals, where its resistance to weathering and chemicals makes it ideal for long-term sealing and protection.
The surface tension of polysulfide rubber typically ranges between 30 and 40 dyn/cm.
It is marketed under trade names such as LP and THIOKOL, representing specific formulations tailored for industrial needs.
Bonding
Due to the chemical inertness of polysulfide rubber, it is recommended to pretreat the surface with a primer or expose it to corona or plasma treatment to enhance adhesion. Clean thoroughly to remove dirt, grease, or oil, as these may impair adhesion. Use a non-greasy cleaner and ensure the surface is dry before bonding.
Adhesive options:
- Cyanoacrylate (CA): Very fast curing, reducing bonding time and increasing productivity. Strong and reliable adhesion.
- Methyl methacrylate (MMA): Fast curing, strong bonding, excellent chemical and solvent resistance.
- UV adhesive: Rapid curing under UV light, precise placement before curing, strong bonds, vibration resistance, solvent-free, flexible application across different materials.
- Silicone adhesive: Excellent chemical resistance, waterproofing, and elasticity. Suitable for extreme temperatures and demanding environments.
Allow full curing according to manufacturer’s instructions. Test bonding strength after curing, especially for applications requiring high chemical resistance or durability.
Producers
Morton Thiokol is a leading producer of polysulfide rubber, marketed under the trade names LP and THIOKOL, known for reliability and long-term performance.
Contact us
Do you have questions about bonding or need advice on choosing the right adhesive for your application? Our experts are ready to help you achieve reliable and durable bonding.
We offer solutions with adhesive products that are tailored to meet your specific needs.
Contact us today for professional advice and support.
Call us at +45 66171802 to speak directly with one of our specialists, or send us an email at info@hojstrup.dk.
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