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In the KOMA Celuka process, special extrusion tooling allows for the cooling of the outer surface of the material while creating an intended cavity inside the profile. This cavity allows inward expansion of the cellular material, resulting in a trimboard with a hard, smooth outer surface and a strong cellular core. This process results in the hardest, most durable surface of any PVC building product available.

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The KOMA® Celuka Process

In the KOMA Celuka process, special extrusion tooling allows for the cooling of the outer surface of the material while creating an intended cavity inside the profile. This cavity allows inward expansion of the cellular material, resulting in a trimboard with a hard, smooth outer surface and a strong cellular core. This process results in the hardest, most durable surface of any PVC building product available.


All KOMA cellular PVC trim products come shrink-wrapped in tight, thick, 2mm specialty polymer blend film that resists puncturing, tearing and zippering and is UV-stabilized for extended storage.


You’ll notice an immediate difference upon delivery with no mars, dents or scratches on the product. Builders also love the KOMA difference as they nail, glue, drill, rout, and cut our PVC trim boards using regular tools.


While KOMA exterior PVC trim products are UV-resistant and do not require paint for protection, best practices would include painting to help clean-up installation marks and improve mildew and dirt resistance. The special proprietary sanded surface of KOMA Trim provides excellent adhesion for high quality 100% acrylic latex paint color less than #65 on the light reflective scale.


KOMA PVC trim products look, feel and work just like high quality wood, but are impervious to moisture, insects and just about anything else Mother Nature can deal out.


KOMA PVC trim board won’t swell, rot, split, delaminate or cup, even under the harshest of conditions. The secret is Celuka extrusion process that delivers the hardest surface in the industry, and the most exacting thicknesses ever manufactured.


The Hard Choice is a great choice for building channel professionals and their clients.


KOMA Limited Warranty Coverage


Other Applications for KOMA Building Products:

• Corbels
• Cornice
• Custom Millwork
• Door & Window Trim
• Gingerbread
• Pediments and Pilasters


Visit the KOMA website to learn more

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Type in your zip code below to find a KOMA Trim dealer near you.