---
product_id: 607632392
title: "FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1)"
brand: "ciwenkai"
price: "13920 som"
currency: KGS
in_stock: true
reviews_count: 8
category: "Ciwenkai"
url: https://www.desertcart.kg/products/607632392-fr4-epoxy-sheet-resin-glass-fiber-insulation-plate-335-300
store_origin: KG
region: Kyrgyzstan
---

# Flame retardant 4mm rigid thickness High insulation & chemical resistance FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1)

**Brand:** ciwenkai
**Price:** 13920 som
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your projects with the ultimate high-strength, flameproof FR4 sheet!

## Quick Answers

- **What is this?** FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) by ciwenkai
- **How much does it cost?** 13920 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/607632392-fr4-epoxy-sheet-resin-glass-fiber-insulation-plate-335-300)

## Best For

- ciwenkai enthusiasts

## Why This Product

- Trusted ciwenkai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Custom Fabrication:** Easily cut, drill, and mold for tailored professional applications.
- • **Precision-Engineered Rigidity:** 4mm thick fiberglass composite ensures rock-solid structural support.
- • **Versatile Industrial Backbone:** Trusted in aviation, rail, wind power & high-end electronics manufacturing.
- • **Superior Electrical Insulation:** Protect sensitive components with top-tier dielectric strength.
- • **Unmatched Thermal & Flame Defense:** Stay cool and safe with industry-grade flame retardant epoxy resin.

## Overview

The FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm) is a premium industrial-grade composite combining continuous filament fiberglass with a flame-retardant epoxy resin binder. It delivers exceptional mechanical strength, high temperature resistance, and superior electrical insulation, making it indispensable across advanced sectors like aviation, rail transit, and electronics. Its 4mm thickness offers robust rigidity while maintaining chemical and thermal stability, ideal for precision fabrication and demanding applications.

## Description

Thickness: 10.0mm Dimension:335x300mm Color:Green Material: Fiber Glass FR-4 is a thermoseting industrial laminate consisting of a continuous filament glass.Cloth material with an epoxy resin binder. It has characteristics of high strength. It has excellent electrical properties and chemical resistance.

Review: PERFECT! for my application - FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate - 335x300x3.0mm This thin, high-strength, very rigid glass-reinforced resin plate solidly supports a heavy security camera with floodlights mounted on my garage. The garage’s aluminum siding is far too weak to support the 2-1/2 pound camera/floodlight, and, since the siding’s strakes tilt out from the garage’s 1x10 wood structure, they can’t be sandwiched behind the camera’s mounting base without collapsing into the underlying air space. My solution to that problem incorporates this composite plate into a fabricated panel that angles out to meet the back surface of the aluminum siding, accepts the camera’s mounting screws, and transfers the camera’s weight to the wood structure of the building. The project took some head-scratching and a good bit of fiddling, but the result is satisfyingly neat, strong, and weatherproof. Permanent too. My original idea was to use 1/16” sheet aluminum for the mounting plate, but I wasn’t confident it would be stiff enough. Spotting this engineered composite on desertcart was the eureka moment. It was just perfect for my application. I jig sawed the perimeters with a combination blade and drilled holes using carbide bits at moderate speed. Two-part slow-cure epoxy formed very strong attachments for necessary standoffs and threaded fasteners. (I prepped surfaces with acetone and coarse sandpaper.) This material met my particular needs SO well that it brought a good deal of pleasure to the project. Note to self - and to anyone who has read this far: Get this stuff when a situation calls for sheet material that’s really rigid and strong, waterproof, chemically and thermally stable, affordable… light, and good looking.
Review: Perfect for 3D printing bed - Perfect for use as an adhesion layer over a heated bed for a 3D printer. Excellent PLA adhesion at 60C; and releases with no effort once cooled back to 30C. Note that you will need a touch probe (not inductive) for accurate bed leveling; and that if you need to hacksaw the panel to fit your bed; make sure to wear a dust mask, and saw wet to keep the fiberglass dust down.

## Features

- 1. FR-4 epoxy board has the characteristics of insulation, flame retardant, high temperature resistance, and strong physical properties
- 2. It is an indispensable main material or auxiliary material for high -end motor electrical appliances, wind power, hydropower, rail transit, aviation navigation, mold molds, electronics, intelligent physiotherapy and other industries.
- 3. You can injection mold molding machine, motor, PCB, ICT treatment table grinding pad, high -performance electronic insulation, FPC reinforcement board, carbon film, insulation pad .
- 4. Good wetness and solidification

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CMZKTWCY |
| Best Sellers Rank | #203,505 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Construction Boards |
| Customer Reviews | 4.8 4.8 out of 5 stars (34) |
| Date First Available | July 25, 2022 |
| Grade | Industrial |
| Item Form | Sheet |
| Item Thickness | 4 Millimeters |
| Item Weight | 1.9 pounds |
| Manufacturer | Ciwenkai |
| Manufacturer Part Number | 2356476 |
| Material Type | FR4 Epoxy |
| Number of Items | 1 |
| Product Dimensions | 13 x 11 x 0.4 inches |
| Size | 335×300×4mm |

## Product Details

- **Brand:** Ciwenkai
- **Color:** green
- **Item dimensions L x W x H:** 13 x 11 x 0.4 inches
- **Material:** FR4 Epoxy
- **Shape:** Rectangular

## Images

![FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) - Image 1](https://m.media-amazon.com/images/I/619SyweeX+L.jpg)
![FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) - Image 2](https://m.media-amazon.com/images/I/61k-Q+9ZAFL.jpg)
![FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) - Image 3](https://m.media-amazon.com/images/I/71N0ogsWORL.jpg)
![FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) - Image 4](https://m.media-amazon.com/images/I/810sLGAxzIL.jpg)
![FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate (335×300×4mm, 1) - Image 5](https://m.media-amazon.com/images/I/91T+6SqqqBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ PERFECT! for my application
*by A***R on October 24, 2023*

FR4 Epoxy-Sheet Resin Glass-Fiber Insulation-Plate - 335x300x3.0mm This thin, high-strength, very rigid glass-reinforced resin plate solidly supports a heavy security camera with floodlights mounted on my garage. The garage’s aluminum siding is far too weak to support the 2-1/2 pound camera/floodlight, and, since the siding’s strakes tilt out from the garage’s 1x10 wood structure, they can’t be sandwiched behind the camera’s mounting base without collapsing into the underlying air space. My solution to that problem incorporates this composite plate into a fabricated panel that angles out to meet the back surface of the aluminum siding, accepts the camera’s mounting screws, and transfers the camera’s weight to the wood structure of the building. The project took some head-scratching and a good bit of fiddling, but the result is satisfyingly neat, strong, and weatherproof. Permanent too. My original idea was to use 1/16” sheet aluminum for the mounting plate, but I wasn’t confident it would be stiff enough. Spotting this engineered composite on Amazon was the eureka moment. It was just perfect for my application. I jig sawed the perimeters with a combination blade and drilled holes using carbide bits at moderate speed. Two-part slow-cure epoxy formed very strong attachments for necessary standoffs and threaded fasteners. (I prepped surfaces with acetone and coarse sandpaper.) This material met my particular needs SO well that it brought a good deal of pleasure to the project. Note to self - and to anyone who has read this far: Get this stuff when a situation calls for sheet material that’s really rigid and strong, waterproof, chemically and thermally stable, affordable… light, and good looking.

### ⭐⭐⭐⭐⭐ Perfect for 3D printing bed
*by J***N on March 26, 2023*

Perfect for use as an adhesion layer over a heated bed for a 3D printer. Excellent PLA adhesion at 60C; and releases with no effort once cooled back to 30C. Note that you will need a touch probe (not inductive) for accurate bed leveling; and that if you need to hacksaw the panel to fit your bed; make sure to wear a dust mask, and saw wet to keep the fiberglass dust down.

### ⭐⭐⭐⭐ Great for printing PA
*by N***R on July 25, 2024*

I like printing PA, but I've struggled mightily with proper adhesion. Mostly due to laziness, I waited a long time to try this well-known fix. Now that I have, I do wish I'd done it a long time ago. If anything, my prints stick almost too well, but holding them up to an AC vent or even a fan generally makes them release pretty reliably without breaking things. They also keep a pretty good finish even when using a metal tool to pop parts off. I like it. WIsh they'd make them in a 250mm size. Mine's a bit small for my Bambu printer, so I have to manually level the bed, but not a huge deal considering the benefits. I'd like to suggest to the seller that he offer them in a size that fits BambuLab printers as they're pretty popular and the right size would be an attractive selling point for a growing number of potential customers. 4 stars, because of this one small oversight.

## Frequently Bought Together

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-27*