Low weight, elastic, and highly compressible – Expancel Microspheres are perfectly suited to the production of automotive weather strips.

Weather strips with low weight and desired surface appearance

Expancel Microspheres' uniform, closed cell structure results in a stable, controlled foaming process and is a phenomenal blowing agent on its own, or combined with a chemical blowing agent. Our microspheres reduce density allowing your weather strips to be lighter while still offering its protective properties. Even low dosages of Expancel will reduce the weight and let you save on raw material costs.

Expancel's uniformity in particle size, and the possibility to choose different particle sizes, enables production of desired surface appearance of your automotive weather strips.

The best suited Expancel product for automotive weather strips

Related applications

Underbody coatings and sealants

Reduce weight and dampen sound and vibration


Closed cell spheres for excellent foaming control across plenty of applications

Seats, plastic interiors for automotive

Improve flexibility and surface finishes

Model-making board for automotive

Cut costs for a more lightweight, more durable board solution

All applications