Views: 0 Author: Site Editor Publish Time: 2026-06-16 Origin: Site
For more than 50 years, Lantor Coremat® has been one of the most recognized core materials in the FRP industry. Originally developed in the Netherlands in 1974, Coremat introduced a lightweight microsphere-filled polyester structure that helps manufacturers reduce laminate weight, lower resin consumption, improve stiffness, and minimize fiber print-through in open-mold composite production.
Today, Coremat Xi remains widely used in boat building, transportation panels, sanitary products, tanks, and industrial FRP components manufactured through hand lay-up and spray-up processes.
However, many manufacturers face a common challenge: frequent stock shortages and long lead times for imported Lantor Coremat products. Production schedules can be delayed when materials are unavailable, especially for projects requiring continuous supply.
If you are searching for a reliable replacement for Lantor Coremat Xi hand lay-up series, two proven alternatives are available today:
U-PICA MAT T Series (Japan)
PGI MATLINE Series (France)
Both products provide equivalent lightweight core performance while offering more stable availability for global FRP manufacturers.
As global demand for composite materials continues to grow, many FRP producers have experienced supply challenges with imported Coremat products.
Common concerns include:
Imported Coremat inventory is often limited, causing purchasing difficulties for manufacturers with ongoing production schedules.
International shipping and distributor inventory fluctuations may result in extended delivery times.
Repeated supply disruptions can increase purchasing costs and affect project profitability.
When a core material becomes unavailable, entire laminate production lines may be forced to stop, creating costly delays.
For these reasons, many manufacturers are actively evaluating qualified alternatives that can be integrated into existing hand lay-up processes without changing laminate designs.
Lantor Coremat Xi is a lightweight polyester nonwoven core material containing embedded microspheres.
When placed between fiberglass reinforcement layers, it creates a thicker laminate structure without adding significant weight.
Key benefits include:
Reduced laminate weight
Lower resin consumption
Improved stiffness
Better impact resistance
Reduced fiber print-through
Improved surface appearance
Excellent conformability to complex molds
Coremat Xi is commonly used with:
Polyester resin
Vinyl ester resin
Epoxy resin
Phenolic resin
Typical applications include:
Boat hulls and decks
RV panels
Swimming pools
Water tanks
Transportation panels
Industrial covers and housings
Lantor offers different Coremat product families for different manufacturing processes.
This article focuses specifically on alternatives to:
Process: Hand Lay-Up & Spray-Up
The alternatives discussed below are intended as replacements for open-mold manufacturing applications.
In most hand lay-up FRP applications, both U-PICA MAT T Series and PGI MATLINE can serve as direct substitutes for Coremat Xi.
Property | Lantor Coremat Xi | U-PICA MAT T Series | PGI MATLINE |
Manufacturing Process | Hand Lay-Up / Spray-Up | Hand Lay-Up / Spray-Up | Hand Lay-Up / Spray-Up |
Lightweight Structure | Yes | Yes | Yes |
Resin Compatibility | Polyester, VE, Epoxy | Polyester, VE, Epoxy | Polyester, VE, Epoxy |
Print-Through Control | Excellent | Excellent | Excellent |
Mold Conformability | Excellent | Excellent | Excellent |
Weight Reduction | Excellent | Excellent | Excellent |
Stiffness Improvement | Excellent | Excellent | Excellent |
Availability | Frequently Limited | Stable Supply | Stable Supply |
For most open-mold FRP structures, these products can be integrated into existing laminate constructions with minimal process adjustments.
U-PICA MAT T Series is a professional lightweight core mat manufactured in Japan and designed specifically for open-mold FRP production.
Unlike conventional fiberglass bulking materials, U-PICA combines lightweight construction with excellent laminate performance, making it a popular substitute for Coremat Xi.
Designed specifically for hand lay-up and spray-up processes
Excellent fiber print-through suppression
Superior surface finish quality
Lower laminate density than traditional fiberglass structures
Excellent resin wet-out
Easy mold conformity for complex geometries
Stable thickness control
Boat hulls
Boat decks
RV side panels
Water tanks
Sanitary products
Industrial housings
Architectural FRP components
For manufacturers focused primarily on hand lay-up production, U-PICA MAT T Series is often considered one of the closest alternatives to Coremat Xi available today.
PGI MATLINE is a high-performance flexible core mat manufactured in France and widely used across marine, transportation, construction, and industrial composite markets.
It delivers the same great performance that makes Coremat a global success.
Consistent laminate thickness
Improved laminate stiffness
Good impact resistance
Excellent resin compatibility
Stable positioning on vertical surfaces during lay-up
Suitable for large FRP structures
Marine interiors
Rail interior panels
Truck body panels
Construction panels
Swimming pools
Industrial cladding systems
PGI MATLINE is particularly attractive for manufacturers producing large or geometrically complex FRP structures.
Your process is primarily hand lay-up
Surface appearance is critical
You require excellent print-through control
Lightweight performance is a priority
Your products feature complex geometries
Large panel structures are common
Enhanced drapability is important
You require consistent performance across large laminate areas
If you are unsure which material best matches your laminate design, our technical team can help evaluate your application.
JLON Composite supplies high-performance composite materials to customers in more than 40 countries worldwide.
We maintain regular inventory of hand lay-up core mat alternatives to help customers avoid production interruptions caused by supply shortages.
Fast shipment options are available for customers in marine, transportation, industrial, and construction markets.
In addition to core mats, JLON also supplies:
Fiberglass fabrics
Carbon fiber fabrics
PVC foam core
PET foam core
PMI foam core
Vacuum infusion materials
SMC/BMC reinforcements
This allows customers to consolidate purchasing and simplify supply chain management.
Yes. U-PICA MAT T Series is widely used as an alternative for hand lay-up Coremat Xi applications and provides comparable lightweight bulking and print-through control performance.
Yes. PGI MATLINE is compatible with polyester, vinyl ester, epoxy, and other common FRP resin systems.
Both products are suitable for marine applications. U-PICA is often preferred for high-quality surface finish requirements, while PGI MATLINE performs exceptionally well in large and complex structures.
If your production is affected by Lantor Coremat shortages, JLON Composite can provide stable, high-performance alternatives from Japan and France.
Whether you are manufacturing boats, RV panels, tanks, transportation components, or industrial FRP structures, our team can help you identify the most suitable hand lay-up core mat solution for your application.
Contact JLON Composite today to request technical data sheets, samples, or a quotation.
