---
product_id: 373253480
title: "Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor 3/4\"(19MM)-1lb"
brand: "uptthow"
price: "€ 33.79"
currency: EUR
in_stock: true
reviews_count: 13
category: "Uptthow"
url: https://www.desertcart.sk/products/373253480-fiberglass-for-cement-mortar-concrete-reinforcement-anti-seepage-and-anti
store_origin: SK
region: Slovakia
---

# Waterproof & anti-seepage reinforcement 1 lb per cubic yard dosage for max strength 0.75 inch thick fiberglass strands Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor 3/4"(19MM)-1lb

**Brand:** uptthow
**Price:** € 33.79
**Availability:** ✅ In Stock

## Summary

> 🧱 Build Bold, Build Better — Reinforce Your Concrete Like a Pro!

## Quick Answers

- **What is this?** Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor 3/4"(19MM)-1lb by uptthow
- **How much does it cost?** € 33.79 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/373253480-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 Pro Mix:** Simply blend fiberglass with sand and cement, then stir 30-60 seconds longer for a flawless, reinforced mix every time.
- • **Precision Dosage:** Use 1 lb per cubic yard, or increase in high-impact or freeze-thaw zones to future-proof your build.
- • **Crackproof Confidence:** Fiberglass fibers disperse evenly to prevent fine cracks, boosting mortar toughness for long-lasting walls.
- • **Water-Resistant Shield:** Dense fiber network enhances cement impermeability—ideal for basements, exterior walls, and garden floors prone to moisture.
- • **Impact-Ready Reinforcement:** High-strength filaments form a resilient mesh that absorbs shocks and seismic forces, protecting your structure.

## Overview

UPTTHOW Fiberglass for Cement Mortar is a 0.75-inch thick, 1 lb roll of high-strength fiberglass strands designed to reinforce cement mixes. It enhances mortar toughness by preventing cracks, increases waterproofing to stop seepage, and boosts impact resistance for durable building walls and garden floors. Ideal for professional-grade construction and DIY projects, it requires simple mixing with sand and cement and is dosed at 1 lb per cubic yard for optimal performance.

## Description

UPTTHOW Fiberglass for Cement Mortar Concrete Reinforcement Anti-Seepage and Anti-Cracking Cement Mix for Building Walls Garden Floor 3/4"(19MM)-1lb: desertcart.com: Tools & Home Improvement

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 | B099NDS6V2 |
| Best Sellers Rank | #82,720 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,575 in Building Materials |
| Date First Available | July 16, 2021 |
| Item Form | Roll |
| Item Thickness | 0.75 Inches |
| Item Weight | 1 pounds |
| Item model number | Fiberglass 19mm-1lb |
| Manufacturer | UPTTHOW |
| Number of Items | 1 |
| Package Dimensions | 10.55 x 7.44 x 2.05 inches |

## Product Details

- **Brand:** UPTTHOW
- **Color:** White
- **Item Diameter:** 0.75 Inches
- **Material:** Fiberglass
- **Shape:** Fluffy

## Images

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

## Available Options

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

## Questions & Answers

**Q: Are the fibers AR fiberglass (alkali resistant) ?**
A: I made hypertufa pots with the fibers in the mixture since they are glass fibersI believe they are alkali resistant

**Q: Will this work with self leveling cement?**
A: First if your using self leveling cement you most likely are and should be covering it with tile or some type flooring. It should not really need the fiberglass fibers for strength since it is getting covered up. It is possible it will work but don't use a heavy amount. I would try a small test spot on a piece of plywood or somewhere. See what other answers you get back also, or ask the seller too

## 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

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-25*