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.

Low Shrinkage & Low Profile Additive (LSA/LPA) for SMC/BMC
Setting the global standard for composite molding precision, POLYMER operates as a premier low shrinkage additive manufacturer. Our PLM-9892 is a highly advanced anti shrinkage additive for unsaturated polyester resins, meticulously engineered through phase-separation technology to completely eliminate curing shrinkage and internal stress during rigorous SMC and BMC molding processes.
Functioning as a true zero shrinkage resin additive, it effectively resolves critical industry challenges such as part warping, dimensional deviations, and fiberglass print-through. Widely specified globally as the ultimate Class A surface additive for SMC, this specialized low profile additive for SMC guarantees a flawless, high-gloss finish for automotive body panels, sanitary ware, and electrical enclosures.
100% Zero ShrinkageClass-A Surface FinishEliminates Sink MarksHighly TintableOptimized for SMC & BMC
Low Profile Additive (LPA) for SMC/BMC
Setting the global standard for flawless composite surfaces, POLYMER operates as a premier LPA additive manufacturer. Our PLM-814 is a highly advanced anti shrinkage additive for unsaturated polyester resins, meticulously engineered to counteract curing contraction and internal stress during rigorous SMC and BMC molding processes.
Acting as a powerful zero shrinkage resin additive, it effectively eliminates critical industry pain points such as part warping, dimensional deviations, and fiberglass read-through. Widely specified as the ultimate Class A surface additive for composites, this premium low profile additive for SMC guarantees a mirror-smooth, high-gloss finish for automotive panels and precision enclosures.
100% Zero ShrinkageClass-A Surface FinishEliminates Surface WavinessExcellent PigmentabilityOptimized for SMC & BMC

