---
product_id: 72448195
title: "RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon"
brand: "rm18"
price: "฿6484"
currency: THB
in_stock: true
reviews_count: 8
category: "Rm18"
url: https://www.desertcart.co.th/products/72448195-rm18-fast-acting-weed-and-grass-killer-herbicide-spray-1
store_origin: TH
region: Thailand
---

# Treats 12,600 sq ft 1-gallon concentrate Visible results in 12 hours RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon

**Brand:** rm18
**Price:** ฿6484
**Availability:** ✅ In Stock

## Summary

> 🌱 Fast, fierce, and flawless weed control—because your lawn deserves the best.

## Quick Answers

- **What is this?** RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon by rm18
- **How much does it cost?** ฿6484 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/72448195-rm18-fast-acting-weed-and-grass-killer-herbicide-spray-1)

## Best For

- rm18 enthusiasts

## Why This Product

- Trusted rm18 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Spray & Save Time:** Easy-to-use spray form cuts down manual labor—ditch the weed whacker and reclaim your weekend.
- • **Trusted & Proven Formula:** Highly rated with 4.5 stars from over 1,800 users—join the community of satisfied pros.
- • **Maximize Your Yard Control:** One gallon makes up to 42 gallons of ready-to-use spray—cover more, stress less.
- • **Dominate Weeds & Grass Fast:** See visible results in just 12 hours—because your time is valuable.
- • **Massive Coverage, Minimal Effort:** Treats up to 12,600 square feet—perfect for large properties or commercial spaces.

## Overview

RM18 Fast-Acting Weed & Grass Killer is a powerful 1-gallon herbicide concentrate that treats up to 12,600 sq ft with visible results in just 12 hours. Trusted by thousands, it transforms weed control into a quick, efficient task, making it ideal for large lawns and professional use.

## Description

RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon

Review: Kills grass fast - This is the best weed and grass killer that I have ever used.Sprayed a long my chain fence and saved a lot of time weed whacking.
Review: A- 1 - It work perfectly as described. I would highly recommend it.

## Features

- Makes up to 42 gallons to ready-to-use spray solution
- Treats up to 12, 600 Square feet
- Visible results in 12 hours

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BB8G44B |
| Active Ingredients | Herbicide |
| Best Sellers Rank | #19,382 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #118 in Weed Killers |
| Brand | RM18 |
| Brand Name | RM18 |
| Color | No Color |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,838) |
| Date First Available | March 8, 2018 |
| Included Components | RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon |
| Item Dimensions LxWxH | 4.25 x 7.5 x 11.88 inches |
| Item Form | Spray |
| Item Package Dimensions L x W x H | 11.69 x 7.44 x 4.06 inches |
| Item Weight | 9.25 Pounds |
| Liquid Volume | 1 Gallons |
| Manufacturer | Ragan & Massey, Inc. |
| Material | Plastic |
| Model Name | RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon |
| Number of Items | 1 |
| Package Weight | 4.23 Kilograms |
| Part Number | 75436 |
| Size | 1-gallon |
| Suggested Users | Unisex-Adult |
| UPC | 737716754360 |
| Unit Count | 128.0 Fluid Ounces |
| Warranty Description | Warranty |

## Product Details

- **Active Ingredients:** Herbicide
- **Brand:** RM18
- **Item Form:** Spray
- **Item Weight:** 9.3 Pounds
- **Liquid Volume:** 1 Gallons

## Images

![RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon - Image 1](https://m.media-amazon.com/images/I/81Wg5DNk2vL.jpg)

## Questions & Answers

**Q: will this work for Spotted spurge**
A: Call RM18 mfg for specific advice

**Q: Will it work on catails and if so though the root?**
A: I'm not sure. Look up the list of plants it kills. I know that it can kill kudzu and bamboo -I've done it personally. I would try mixing 6-8oz per gallon if something like that.

**Q: How long should I wait before planting my own garden? I want to kill existing grass and then put in plants of my own.**
A: It only kill when it is sprayed on the leaf. Ground deactivates it

**Q: Why doesn't this kill anything?**
A: I use about 4 oz per gallon of water. Spray and make sure you have a day or two of sunshine. No rain for several days. It takes close to a week to really show the killing power, but believe me it works. Been using this product for years.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Kills grass fast
*by T***O on December 29, 2025*

This is the best weed and grass killer that I have ever used.Sprayed a long my chain fence and saved a lot of time weed whacking.

### ⭐⭐⭐⭐⭐ A- 1
*by T***T on January 7, 2026*

It work perfectly as described. I would highly recommend it.

### ⭐⭐⭐⭐⭐ Nice stuff
*by S***O on December 11, 2025*

Awesome stuff it killed weeds all summer . Will buy again

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---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-27*