--- product_id: 342929813 title: "Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48\" x 24\"x 3\" Thick" brand: "brb products" price: "¥209412" currency: JPY in_stock: false category: "Brb Products" url: https://www.desertcart.jp/products/342929813-roxul-rockwool-mineral-wool-board-prorox-sl940-6-density-48 store_origin: JP region: Japan --- # 6# density noise deadening Fire resistant stone wool R-value 4.2 per inch thermal Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick **Brand:** brb products **Price:** ¥209412 **Availability:** ❌ Out of Stock ## Summary > 🔥 Silence, Safety, and Savings — All Rolled Into One Rock-Solid Board! ## Quick Answers - **What is this?** Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick by brb products - **How much does it cost?** ¥209412 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/342929813-roxul-rockwool-mineral-wool-board-prorox-sl940-6-density-48) ## Best For - brb products enthusiasts ## Why This Product - Trusted brb products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Silence is the New Luxury:** High-density mineral wool traps sound waves for a quieter, focused workspace or serene home. - • **Built to Withstand the Heat:** Non-combustible stone wool meets ASTM C553 standards, ensuring fire safety without compromise. - • **Energy Bills, Meet Your Match:** Superior R-value of 4.2 per inch slashes heating costs and boosts energy efficiency. - • **Durability That Outlasts Trends:** Engineered for lifetime performance—resistant to moisture, wear, and installation damage. - • **Precision Fit, Effortless Install:** Easily cut with a serrated knife for clean edges and perfect coverage every time. ## Overview ProRox SL 940 is a premium 3-inch thick mineral wool insulation board offering exceptional noise reduction, fire resistance, and thermal insulation with an R-value of 4.2 per inch. Made from natural stone and recycled materials, it’s water repellent, durable, and designed for easy installation, making it the go-to choice for professional-grade soundproofing and energy efficiency in offices and homes. ## Description ProRox SL 940 is a non-combustible, semi-rigid mineral wool insulation board that is water repellent and has excellent acoustical qualities that make it great for sound panels as well as insulating the walls of your office space or home. ProRox board is a stone wool based insulation product made from natural stone and recycled material. The combination of stone wool and recycled content make ProRox products fire resistant. ROXUL’s ProRox SL 940 insulation is engineered to provide unmatched strength to prevent installation and delivery damage and to withstand everyday wear and tear. ProRox is simple to cut with a serrated knife for clean edges and a better fit during installation. It does not absorb water or hold moisture and is embedded with water repellent characteristics that drain water away. ## Features - Noise Insulation: High density and random fiber orientation trap sound waves and deadens vibration time. Perfect for minimizing noise from offices, bedrooms, meeting rooms or spaces close to busy roads. - Thermal Insulation: Reduces energy bills for heat. Rockwool has a R-value higher per inch than Fiberglass insulation - Fire Resistant: Made of rock that is fire resistant. Properties in accordance with ASTM C553, R-value 4.2 per inch - Long Term Performance: Due to the durability of rock it has an unlimited lifetime. - Pack of 5 Boards 3" thick x 2' x 4' ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YM3522P | | Best Sellers Rank | #732,618 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #104 in Construction Boards | | Brand Name | BRB Products | | Coverage | 40 square feet | | Customer Reviews | 4.6 4.6 out of 5 stars (21) | | Included Components | Insulation Board | | Item Dimensions L x W | 24"L x 48"W | | Item Thickness | 3 inches | | Manufacturer | Rockwool | | Material Type | Wool | | Model Number | Rockwool | | Recommended Uses For Product | noise insulation, thermal insulation, fire resistance | | UPC | 685757189071 | ## Product Details - **Brand:** BRB Products - **Item Thickness:** 3 inches - **Material:** Wool - **Product Dimensions:** 24"L x 48"W - **Recommended Uses For Product:** noise insulation, thermal insulation, fire resistance ## Images ![Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick - Image 1](https://m.media-amazon.com/images/I/61xx6Yl1PfL.jpg) ![Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick - Image 2](https://m.media-amazon.com/images/I/61pZs6amYgL.jpg) ![Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick - Image 3](https://m.media-amazon.com/images/I/71D-ibrcToL.jpg) ![Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick - Image 4](https://m.media-amazon.com/images/I/711zdroWrAL.jpg) ![Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), 48" x 24"x 3" Thick - Image 5](https://m.media-amazon.com/images/I/51B23ai8qZL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: it states 5 pack. Is that 5 in one pack and you ship 5 of those packs for total of 25 boards?** A: We received 2 packages with 5 boards in each **Q: What is actual r value of this product? Want to use in flat roof, and need r-40.** A: you can look at data sheet for it and convert. I don't think this specific rockwool product has been tested for R value. **Q: Do you have the sl 920 or sl 930 available ?** A: No, unfortunately not at this time. **Q: Clarify package quantity? Description shows 5, Information shows 10.** A: 5 is how I received them. ## Frequently Bought Together - Roxul, Rockwool Mineral Wool Board, ProRox SL940 (6# Density), Click for Size Options - SunplusTrade 2" x 50' Black Exhaust Heat Wrap Roll for Motorcycle Fiberglass Heat Shield Tape with Stainless Ties - Zombiebox Generator Exhaust Extension Silencer Kit with Insulated Through-Wall Mounting Plate - Includes 3 Adapters - Fits All portable Generators --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/342929813-roxul-rockwool-mineral-wool-board-prorox-sl940-6-density-48](https://www.desertcart.jp/products/342929813-roxul-rockwool-mineral-wool-board-prorox-sl940-6-density-48) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-15*