---
product_id: 1050620
title: "ROBERTS Black Jack Underlayment - 100 sq. ft. Roll - 43\" x 28' x 2.5 mm"
brand: "roberts"
price: "₩167066"
currency: KRW
in_stock: true
reviews_count: 13
url: https://www.desertcart.kr/products/1050620-roberts-black-jack-underlayment-100-sq-ft-roll-43-x
store_origin: KR
region: South Korea
---

# Closed cell moisture barrier 100 sq. ft. coverage 2.5 mm thick foam layer ROBERTS Black Jack Underlayment - 100 sq. ft. Roll - 43" x 28' x 2.5 mm

**Brand:** roberts
**Price:** ₩167066
**Availability:** ✅ In Stock

## Summary

> 🏡 Elevate your floors with comfort and confidence — the Black Jack advantage!

## Quick Answers

- **What is this?** ROBERTS Black Jack Underlayment - 100 sq. ft. Roll - 43" x 28' x 2.5 mm by roberts
- **How much does it cost?** ₩167066 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/1050620-roberts-black-jack-underlayment-100-sq-ft-roll-43-x)

## Best For

- roberts enthusiasts

## Why This Product

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

## Key Features

- • **Seamless Installation:** 4-inch plastic overlap with adhesive strip ensures tight, secure joins
- • **Spacious Roll Coverage:** Covers 100 sq. ft. per roll for efficient installation
- • **Subfloor Smoothing Power:** Levels minor imperfections for a flawless finish under laminate and engineered wood
- • **Moisture-Resistant Barrier:** Dense closed-cell structure seals out moisture to protect your floors
- • **Optimal Cushioning & Soundproofing:** 2.5 mm foam thickness delivers superior comfort and noise reduction

## Overview

ROBERTS Black Jack Underlayment is a premium 2-in-1 solution designed for laminate, bamboo, and engineered wood floors. Featuring a 2.5 mm thick closed-cell foam layer, it provides cushioning, sound absorption, and moisture resistance. Each 100 sq. ft. roll includes a 4-inch overlap with adhesive strip for easy, secure installation, smoothing minor subfloor imperfections while protecting your investment with a limited lifetime warranty.

## Description

The ROBERTS Black Jack 2-in-1 Underlayment is designed for use under floated laminate, bamboo and engineered wood floors and is ideal for many types of subflooring. Black Jack is engineered as a superior grade, 2-in-1 underlayment with a 2.5 mm thick foam layer that provides optimal cushioning and sound absorption, as well as a closed cell foam design that offers excellent moisture vapor resistance. The underlayment also features a 4 in. overlap and adhesive strip to seal out moisture and join multiple rolls.

Review: Amazing! - We just laid 1100 square feet on LVP and used this as our underlayment. Only 2 rooms had cement floors after tearing out the carpet, the rest was floated over linoleum. According to both the package and the website, a vapor barrier was not required underneath. This underlayment was fairly easy to lay down. We just drug the length out and cut it at the wall with a box cutter. In areas where I had to piece pieces in we used underlayment tape to tape it together, but you can also use packaging tape for that. Keep a broom handy to keep it clean before you put flooring on top of it. At first, the floors had a little bit of a clicking sound as you walked, but after 2 days that went away as the floor settled in. Our floors are quiet and have a very soft feel to them when you walk on them. This underlayment did exactly what I wanted, it was perfect. Not to mention it was also less than half the price of what you would pay at the big box store. I ordered two rolls of 600 ft and had plenty left over.
Review: This is a great underlayment for flooring - Absolutly, loved this underlayment. It was easy to put down, and it is just the right thickness. I would definately recomment it. It is priced right, and is good value for the money. My husband laid the flooring (click clack) on top of it an there was a small dip in the floor before he laid it, in one area, and you don't even feel it. The flooring feels even and comfortable to walk on. It is durable to walk across as well before putting down the flooring without tearing up. The measurents for the product are accurate, and it functions as descriped.

## Features

- 100 sq. ft. coverage with rolls measuring 28 ft. x 43 in. x 2.5 mm
- For use under laminate and engineered wood flooring
- Dense, closed cell structure offers moisture barricade
- Offers cushioning, sound reduction, resistance and levels minor sub floor imperfections
- Easy installation with plastic overlap and adhesive strip

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00CJBLR2I |
| Best Sellers Rank | #63,096 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #18 in Flooring Underlayments |
| Brand Name | ROBERTS |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (826) |
| Global Trade Identification Number | 00075378700265 |
| Grade Rating | Residential |
| Included Components | Underlayment Roll |
| Item Dimensions | 336 x 43 x 0.09 inches |
| Item Form | Sheet |
| Item Shape | Rectangular |
| Item Thickness | 2.5 Millimeters |
| Item Type Name | Premium 2-in-1 Underlayment |
| Item Weight | 1.95 Pounds |
| Manufacturer | Roberts |
| Material | wood |
| Model Number | 70-026 |
| Number of Items | 1 |
| Part Number | 70-026 |
| Specification Met | True |
| UPC | 075378700265 |
| Unit Count | 100.0 Square Feet |
| Warranty Description | Limited Lifetime |

## Product Details

- **Brand:** ROBERTS
- **Color:** Black
- **Item dimensions L x W x H:** 336 x 43 x 0.09 inches
- **Material:** wood
- **Shape:** Rectangular

## Images

![ROBERTS Black Jack Underlayment - 100 sq. ft. Roll - 43" x 28' x 2.5 mm - Image 1](https://m.media-amazon.com/images/I/61obWlCD1YL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What is the sound ratings ,ie IIC,STC,in order to comply with HOA**
A: That is incorrect, from Roberts website, it's a bit higher with IIC at 70 and STC at 66

**Q: Whats R-Value or Thermal Resistance for this Underlayment? Installing over Radiant Heated Concrete slab and need a low R-value.**
A: The manufacturer's information doesn't really say anything about R value and I doubt there is any. It must be extremely extremely small. I installed this underlayment over dricore panels. Works great...

**Q: What density rating is this product?**
A: Hi! Please refer to below information. 

item#	thickness 	times	density (kg/m³)
70-026　2.5MM	        30　        33

**Q: Would this work on a van floor?**
A: Debra,This backing provides moisture and sound benefits for rigid flooring over cement applications. It is easily ripped if you are not careful when installing flooring. I'd use something more durable for a vehicle especially if moisture or sound reduction isn't an issue.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing!
*by G***I on June 23, 2023*

We just laid 1100 square feet on LVP and used this as our underlayment. Only 2 rooms had cement floors after tearing out the carpet, the rest was floated over linoleum. According to both the package and the website, a vapor barrier was not required underneath. This underlayment was fairly easy to lay down. We just drug the length out and cut it at the wall with a box cutter. In areas where I had to piece pieces in we used underlayment tape to tape it together, but you can also use packaging tape for that. Keep a broom handy to keep it clean before you put flooring on top of it. At first, the floors had a little bit of a clicking sound as you walked, but after 2 days that went away as the floor settled in. Our floors are quiet and have a very soft feel to them when you walk on them. This underlayment did exactly what I wanted, it was perfect. Not to mention it was also less than half the price of what you would pay at the big box store. I ordered two rolls of 600 ft and had plenty left over.

### ⭐⭐⭐⭐⭐ This is a great underlayment for flooring
*by C***R on August 13, 2025*

Absolutly, loved this underlayment. It was easy to put down, and it is just the right thickness. I would definately recomment it. It is priced right, and is good value for the money. My husband laid the flooring (click clack) on top of it an there was a small dip in the floor before he laid it, in one area, and you don't even feel it. The flooring feels even and comfortable to walk on. It is durable to walk across as well before putting down the flooring without tearing up. The measurents for the product are accurate, and it functions as descriped.

### ⭐⭐⭐⭐⭐ BUY this not the Other
*by A***R on October 17, 2020*

Lets start off by saying all the negative whiners on here reviewing poorly, I don't know what the heck you all are doing buy you are not doing it right. I'm not a Pro, I'm an IT guy, laid several rooms of flooring before this Bought the Big famous Blue pads before on amazon, took a chance on this because it looked interesting. The only this is it rolls on what i would call backwards. Its all explained in instructions, feels like the factory might need to reverse their rolling. I prefer to unroll list most people drop the edge and kick the roll across the floor, this is a bit different process, but it wasn't bad, just need to be aware is all. I had no problems with tearing and flimsy as others are reporting, I walked on mine and crawled on floor with knee pads as well, no issues with tearing at all, all cut fine and seemed like high quality to me. Great pad, works well, no issue on install, think some others are negative type of reviewers Worth it all, shipping was good too

## Frequently Bought Together

- ROBERTS Black Jack Underlayment - 100 sq. ft. Roll - 43" x 28' x 2.5 mm
- ROBERTS 50-040 Underlayment Tape Roll, Red
- ROBERTS 70-115 Moisture Barricade Underlayment Film, for Vinyl, Laminate SPC, Engineered Wood Floors, 6 mil. Thick, Polyethylene, 120 Sq. Foot Roll, Black

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-05-10*