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Low-Shrinkage Additive

HomeFiberglass & AuxiliariesLow-Shrinkage Additive

Welcome to POLYMER's specialized low shrinkage additive (LSA) category. In thermoset composite manufacturing, resin shrinkage during the curing process often leads to surface defects, fiber print-through, and dimensional warping. As an advanced chemical formulator, we provide premium low profile additive (LPA) solutions to counteract this volume reduction. Our specialized LPA for SMC BMC acts as a highly effective shrinkage control additive, ensuring your molded parts achieve perfect dimensional stability and a flawless cosmetic finish.

Why Choose Our LPA/LSA Solutions?

Automotive-Grade Finish (Class A)

Our advanced thermoplastic low profile additive is designed to eliminate internal micro-cracks and fiber exposure. It acts as an exceptional surface improvement additive and is widely trusted as a premium Class A surface additive for high-gloss, paint-ready exterior panels.

Extreme Dimensional Precision

Formulated as a reliable zero shrinkage additive, it provides controlled volumetric expansion to offset resin contraction. Whether used as an SMC low profile additive for large structural parts or a BMC low shrinkage additive for intricate enclosures, we guarantee precise mold replication.

Our specialized anti-shrinkage portfolio includes:

  • High-Performance SMC/BMC Series: Our flagship PLM-9892 and PLM-814 formulations are the ultimate LSA for composite molding. They function flawlessly as a low profile additive for polyester resin and vinyl ester systems, ensuring excellent paste flowability and rich pigmentability.

  • Versatile Anti-Shrinkage Applications: Acting as a robust anti shrinkage agent, these additives are essential for manufacturing sanitary ware (bathtubs, shower trays), automotive body components, electrical meter boxes, and high-precision structural supports without sink marks.

Struggling with fiber print-through or failing to meet strict dimensional tolerances on your molded parts?        Explore our exact LSA/LPA product series below, or contact our chemical engineering team directly for Technical Data Sheets (TDS) and bulk testing samples.

img of PLM-9892 Low Shrinkage & Low Profile Additive (LSA/LPA) for SMC/BMC

PLM-9892 Low Shrinkage & Low Profile Additive (LSA/LPA) for SMC/BMC

       POLYMER's PLM-9892 is a high-performance Low Profile Additive (LPA) and low-shrinkage formulation designed to eliminate curing shrinkage in unsaturated polyester resins during SMC and BMC molding. It effectively resolves industry challenges such as warping, deformation, surface sink marks, and dimensional deviations, delivering a flawless Class-A surface.    


Class-A SurfaceZero ShrinkageTrue Low ProfileLow ViscosityHighly Tintable
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img of PLM-814 Low Profile Additive (LPA) for SMC/BMC

PLM-814 Low Profile Additive (LPA) for SMC/BMC

       POLYMER's PLM-814 is a premium Low Profile Additive (LPA) designed specifically for SMC and BMC compression molding applications. It strictly counteracts curing shrinkage in unsaturated polyester resins, effectively eliminating industry pain points like product warping, surface waviness, and dimensional deviations to deliver a flawless Class-A surface.    


Class-A SurfaceZero WavinessTrue Low ProfileLow ViscosityHighly Tintable
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Submit your application and molding process. Our polymer engineers will provide a material selection guide and dispatch free test samples rapidly.

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