---
product_id: 527544813
title: "Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor White 3/4\"(19MM)-4lb/Pack"
brand: "uptthow"
price: "€ 44.06"
currency: EUR
in_stock: true
reviews_count: 13
category: "Uptthow"
url: https://www.desertcart.ie/products/527544813-fiberglass-for-cement-mortar-concrete-reinforcement-anti-seepage-and-anti
store_origin: IE
region: Ireland
---

# Waterproof & anti-seepage 4lb per pack for 1 cubic yard 19mm high-strength fibers Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor White 3/4"(19MM)-4lb/Pack

**Brand:** uptthow
**Price:** € 44.06
**Availability:** ✅ In Stock

## Summary

> 🧱 Build Bold, Build Better: Reinforce Your Concrete with Fiberglass Power!

## Quick Answers

- **What is this?** Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor White 3/4"(19MM)-4lb/Pack by uptthow
- **How much does it cost?** € 44.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/527544813-fiberglass-for-cement-mortar-concrete-reinforcement-anti-seepage-and-anti)

## Best For

- uptthow enthusiasts

## Why This Product

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

## Key Features

- • **Easy Integration:** Simply mix with sand and cement, then add water—fiberglass requires just 30-60 seconds extra stirring for a flawless blend.
- • **Precision Dosage:** Use 1 lb per cubic yard for standard strength, or increase dosage in high-impact or freeze-thaw zones for ultimate durability.
- • **Waterproof Warrior:** Boosts cement density to create an impermeable barrier—perfect for basements, garden floors, and exterior walls prone to moisture.
- • **Crackproof Confidence:** Fiberglass fibers weave a resilient mesh that stops fine cracks before they start, ensuring long-lasting structural integrity.
- • **Impact-Ready Reinforcement:** High-strength fiber filaments form a dense net that dramatically enhances impact and seismic resistance.

## Overview

This 4lb pack of 19mm fiberglass fibers is designed to be mixed into cement mortar to significantly enhance toughness, waterproofing, and impact resistance. Ideal for walls, garden floors, and wet environments, it prevents cracking and seepage while improving seismic durability. Easy to use with precise dosage recommendations, it’s a must-have upgrade for professional-grade concrete reinforcement.

## Description

Please note that 4lb are packed in one bag

Review: Perfect addition to Bondo or fiberglass resin. - Perfect for adding to Bondo for extra strength. As a taxidermist, I add it to Bondo to make thinner ears in the animals that I taxidermy. It does a great job.
Review: worked well - worked well; not to fluffy, be sure to add a little at a time, or it clumps up will buy again if required

## Features

- Anti-cracking: Mixing fiberglass and mortar together, the irregular distribution of fiberglass in the mortar enhances the toughness of mortar, and inhibits the formation of fine cracks
- Waterproof and Impermeable: A large number of fiber filaments increase the density of cement, which can effectively solve the problem of penetration. It is very suitable for wet place such as basements, pond, Exterior wall
- Impact Resistance: High-strength fiber filaments are attached to each other as a dense net to hold the cement tightly. It can effectively enhance the impact and seismic performance of cement
- How to Use: Evenly mix sand, cement and fiberglass together, then add an appropriate amount of water, and finally stir (the stiring time is 30-60 seconds longer than without fiberglass)
- Dosage: Use 1 lb. (1 pkg) per cubic yard (27 cubic feet) of concrete. You can add a little more in the area with strong impact or severe freeze-thaw

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BX8P982L |
| Best Sellers Rank | #73,907 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #12 in Mortar Mix |
| Date First Available | March 2, 2023 |
| Item Form | Fiber |
| Item Weight | 4.11 pounds |
| Item model number | JIN-Fiberglass 19mm-4lb |
| Manufacturer | UPTTHOW |
| Number of Items | 4 |
| Package Dimensions | 13.5 x 11.02 x 3.07 inches |

## Product Details

- **Brand:** UPTTHOW
- **Color:** White
- **Item Diameter:** 0.75 Inches
- **Material:** fiberglass
- **Shape:** Honeycomb

## Images

![Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor White 3/4"(19MM)-4lb/Pack - Image 1](https://m.media-amazon.com/images/I/715nRghGIDL.jpg)

## Available Options

This product comes in different **Size, Item Package Quantity** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect addition to Bondo or fiberglass resin.
*by S***V on October 18, 2025*

Perfect for adding to Bondo for extra strength. As a taxidermist, I add it to Bondo to make thinner ears in the animals that I taxidermy. It does a great job.

### ⭐⭐⭐⭐⭐ worked well
*by J***Y on December 20, 2025*

worked well; not to fluffy, be sure to add a little at a time, or it clumps up will buy again if required

### ⭐⭐⭐⭐⭐ It works!
*by T***M on October 17, 2025*

If you want an easy way to make concrete stronger this is what you need!

## Frequently Bought Together

- UPTTHOW Fiberglass for Cement Mortar Concrete Reinforcement Anti-seepage and Anti-cracking Cement Mix for Building Walls Garden Floor 3/4"(19MM)-1lb/PACK
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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-16*