Why RF & RSA outbond and outlast the rest.
Dry Bonding Systems in Rubber Compounding – A Quick Guide
In rubber products like tyres, hoses, belts, and seals – strong bonding is a must. Let’s look at how dry bonding systems have evolved, why industries are moving away from pure resorcinol, and which options deliver best results.
What a Good Dry Bonding System Should Do
- Create strong bonds between rubber and fabric/metal
- Handle heat, pressure, and tough environments
- Follow modern safety and handling rules
Why Pure Resorcinol Is Being Replaced
Though resorcinol is powerful, it has:
- Health risks (skin, thyroid, respiratory issues)
- Strict regulations (near-ban in Europe)
- Handling problems (dust, worker safety, storage)
That’s why industries now prefer safer resorcinol-based systems.
5 Key Dry Bonding Systems to Know
RF (Resorcinol Formaldehyde Resin)
High bonding strength, strong fatigue resistance, proven performance in tyres, hoses, and belts.
RSA – (Resorcinol Stearic Acid Blend)
Cleaner and safer to use. Needs a donor to work effectively. Gives strong adhesion, low fumes, and smooth mixing—ideal for plants focused on safety and compliance.
RDL (Resorcinol + Donor + Silica Blend)
A single, easy-to-handle system made of:
- Resorcinol – the bonding base
- HMMM – the crosslinking agent (donor)
- Precipitated Silica – helps with blending
Good for simplified processing, but may not match RF or RSA in heavy-duty applications.
RSB (Resorcinol Silica Blend)
Resorcinol pre-loaded on silica. Cleaner dosing, but still needs a separate donor—so it adds one more step in the process.
RESO (Pure Resorcinol)
Still effective, and still a top choice for some industries who don’t have replacement option, but today derivatives are chosen over resorcinol at times due to safety, regulations, and extra handling needs.
Why RF and RSA Are Trusted
- Strong bonding across rubber–fabric–metal
- Reliable under heat and stress
- Safer and easier to handle
- Trusted by Indian manufacturers for long-term performance
Paul & Company supplies RF, RSA and Resorcinol – the most trusted dry bonding systems in India.
Let’s help you match the right bonding system to your compound – without compromise.
India’s trusted name in industrial rubber fillers, since 1960.
