SBS vs SEBS: Key Differences in TPE Materials

SBS and SEBS are two common types of Styrenic Block Copolymer (SBC) within the thermoplastic elastomer (TPE) family. Both combine rubber elasticity with thermoplastic processing advantages, but they differ in structure and performance.

What is SBS?

SBS (Styrene-Butadiene-Styrene) is a triblock copolymer consisting of polystyrene end blocks and a polybutadiene mid-block. The structure provides flexibility, impact resistance, and easy processing.

Main features of SBS:

• Excellent elasticity and flexibility

• Good low-temperature performance

• Strong compatibility with PS and ABS

• Cost-effective solution

Typical applications:

• PS / ABS modification

• Adhesives and hot melt systems

• Footwear and tool grips

• Asphalt modification and waterproofing membranes

In asphalt applications, SBS improves elasticity, crack resistance, and durability.

What is SEBS?

SEBS (Styrene-Ethylene-Butylene-Styrene) is the hydrogenated version of SBS. The hydrogenation process improves thermal stability and weather resistance.

Main features of SEBS:

• Excellent UV and weather resistance

• Higher thermal stability

• Low odor and improved purity

• Good transparency

• Strong compatibility with PP and PE

Typical applications:

• Automotive interiors

• Medical and consumer products

• Durable adhesives

• Wire and cable compounds

SBS vs SEBS: Which TPE Should You Choose?

Choose SBS for cost-sensitive applications and PS/ABS modification.

Choose SEBS for outdoor, automotive, medical, or high-durability applications requiring weather resistance and polyolefin compatibility.

Both SBS and SEBS are essential TPE materials. Selecting the right grade depends on performance requirements, processing compatibility, and long-term durability needs.