---
product_id: 63170479
title: "Blackline BL816 Black Water Proof Chalk Line Compound - 8 oz Refill Bottle"
brand: "blackline manufacturing"
price: "€ 39.91"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blackline Manufacturing"
url: https://www.desertcart.pt/products/63170479-blackline-bl816-black-water-proof-chalk-line-compound-8-oz
store_origin: PT
region: Portugal
---

# 100% Waterproof - no washout under heavy rain Refillable & Eco-Friendly - sustainable and cost-effective Wind-Resistant - stays put even in gusty conditions Blackline BL816 Black Water Proof Chalk Line Compound - 8 oz Refill Bottle

**Brand:** blackline manufacturing
**Price:** € 39.91
**Availability:** ✅ In Stock

## Summary

> 💼 Mark your success with lines that never quit!

## Quick Answers

- **What is this?** Blackline BL816 Black Water Proof Chalk Line Compound - 8 oz Refill Bottle by blackline manufacturing
- **How much does it cost?** € 39.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/63170479-blackline-bl816-black-water-proof-chalk-line-compound-8-oz)

## Best For

- blackline manufacturing enthusiasts

## Why This Product

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

## Key Features

- • **Windproof Marking:** Lay out perfect lines even on blustery job sites
- • **Effortless Cleanup:** Washes off easily with mild soap—no black stains, just clean hands
- • **Unstoppable Precision:** Snap crisp, smudge-resistant lines that outlast the elements
- • **Eco-Smart & Refillable:** Save money and the planet with a reusable, non-toxic formula
- • **Weatherproof Reliability:** Rain or shine, your layout stays flawless—no redo needed

## Overview

The Blackline BL816 is an 8 oz refill bottle of waterproof chalk line compound designed for professional-grade layouts. It delivers sharp, smudge-resistant black lines that withstand heavy rain and wind, suitable for wet or dry surfaces. Refillable and environmentally friendly, it cleans off easily with soap and water, making it the go-to choice for durable, precise construction marking.

## Description

Blackline Manufacturing Water Proof Chalk Line Compound - Designed to be used in any chalk reel and is easily removed from hands and work clothing with mild soap and water. Water Proof, will not wash off even under heavy downpours. Saves time and money. Snaps a clean solid line. Out performs traditional chalk with less smudging creating a clean, easy to read line. Easily washed away with mild soap & water from hands and work clothing. Resists being blown away, layouts can be done in windy conditions. Wet or Dry application, can be applied to wet surfaces. Simply remove all excess water and SNAP the lines. Environmentally Friendly, does not contain any toxic materials and is safe for the environment.

Review: “ it’s just a damn good chalk” - I got this after watching a video where it was recommended by the Venable Larry Hahn and he sure was right when he said “it’s just a damn good chalk ”. When we’ve been marking a lot with it our hands turn dark and dingy looking till we can wash up with soap and water but I’ve been blown away how I can come back to an accurate line a week later after a couple downpours and it’s right where I left it. Highly recommended… It did clog up an old Stanley chalk line that was towards the end of its life but it’s been flawless in the Tajima
Review: Wear gloves - Good stuff. Wear gloves when using if you don’t want black fingers

## Features

- Water proof, will not wash away even under heavy downpours
- Out performs traditional chalk with less smudging creating a clean, easy to read line
- Resists being blown away, layouts can be done in windy conditions
- For wet or dry application, simply remove standing or excess water then snap line
- Saves time because layouts, pour lines, etc, will never have to be redone

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007ZYBYE |
| Additional Features | Refillable, Waterproof |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #666,957 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #224 in Measuring & Layout Chalk Lines |
| Body Shape | Round |
| Brand | Blackline Manufacturing |
| Brand Name | Blackline Manufacturing |
| Closure Type | Snaps,Snap |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 50 Reviews |
| Hand Orientation | Ambidextrous |
| Ink Base | Water |
| Ink Color | Black |
| Line Size | 0.5mm" or "NA |
| Manufacturer | Blackline Manufacturing |
| Model Number | BL816 |
| Recommended Uses For Product | Layouts, Pour Lines, etc. |
| Special Feature | Refillable, Waterproof |
| Style | Traditional |
| UPC | 626861000814 |
| Unit Count | 8.0 Ounce |
| Water Resistance Level | Water Resistant |
| Writing Instrument Form | Chalk |

## Product Details

- **Brand:** Blackline
- **Writing Instrument Form:** Chalk
- **Color:** Black
- **Ink Color:** Black
- **Age Range (Description):** Adult

## Images

![Blackline BL816 Black Water Proof Chalk Line Compound - 8 oz Refill Bottle - Image 1](https://m.media-amazon.com/images/I/31R1LcWActL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ “ it’s just a damn good chalk”
*by E***S on January 9, 2026*

I got this after watching a video where it was recommended by the Venable Larry Hahn and he sure was right when he said “it’s just a damn good chalk ”. When we’ve been marking a lot with it our hands turn dark and dingy looking till we can wash up with soap and water but I’ve been blown away how I can come back to an accurate line a week later after a couple downpours and it’s right where I left it. Highly recommended… It did clog up an old Stanley chalk line that was towards the end of its life but it’s been flawless in the Tajima

### ⭐⭐⭐⭐⭐ Wear gloves
*by J***E on November 9, 2025*

Good stuff. Wear gloves when using if you don’t want black fingers

### ⭐⭐⭐⭐⭐ Five Stars
*by M***N on December 29, 2015*

works better than local stuff

## Frequently Bought Together

- Blackline BL816 Black Water Proof Chalk Line Compound - 8 oz Refill Bottle
- Blackline BL816R Red Water Proof Chalk Line Compound - 8 oz Refill Bottle
- TAJIMA Chalk Line - Chalk-Rite Jam Free Chalk Box with Extra Bold 1mm Snap Line & Five Gear Quick Retrieval - CR301JF

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**Shop now:** [https://www.desertcart.pt/products/63170479-blackline-bl816-black-water-proof-chalk-line-compound-8-oz](https://www.desertcart.pt/products/63170479-blackline-bl816-black-water-proof-chalk-line-compound-8-oz)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-14*