--- product_id: 65740140 title: "RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack)" brand: "rockwool" price: "€ 171.22" currency: EUR in_stock: true reviews_count: 8 category: "Rockwool" url: https://www.desertcart.be/products/65740140-rwa45-acoustic-insulation-slabs-75mm-4-32m2-per-pack store_origin: BE region: Belgium --- # Top-tier acoustic absorption Water repellent, moisture resistant A1 Euroclass fire rating RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack) **Brand:** rockwool **Price:** € 171.22 **Availability:** ✅ In Stock ## Summary > 🔥 Silence, Safety & Sustainability — Insulate Like a Pro! ## Quick Answers - **What is this?** RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack) by rockwool - **How much does it cost?** € 171.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/65740140-rwa45-acoustic-insulation-slabs-75mm-4-32m2-per-pack) ## Best For - rockwool enthusiasts ## Why This Product - Trusted rockwool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sound Sanctuary:** Industry-leading acoustic insulation for peaceful, professional environments. - • **Moisture Mastery:** Water repellent design prevents damp, rot, and long-term degradation. - • **Versatile Coverage:** Perfect for floors, walls, roofs, and industrial applications with tailored thickness options. - • **Fireproof Confidence:** Non-combustible A1 Euroclass rating keeps your space safe and compliant. - • **Effortless Installation:** Lightweight slabs designed for quick, hassle-free fitting and cutting. ## Overview Rockwool RWA45 Acoustic Insulation Slabs (75mm) deliver premium thermal, acoustic, and fire protection with an A1 Euroclass fire rating. These water-repellent stone wool slabs cover 4.32m² per pack and are engineered for easy handling and installation. Trusted by industry leaders, they ensure durable, high-performance insulation for floors, walls, and roofs, making them the go-to choice for professionals seeking safety, comfort, and efficiency. ## Description Rockwool RWA45 Insulation Slabs Thicknesses available: 50mm, 75mm, 100mm Slab Size: 1200mm x 600mm Thickness: 50mm Quantity of slabs: 9 Coverage per pack: 6.48 m2 Thickness: 75mm Quantity of slabs: 6 Coverage per pack: 4.32 m2 Thickness: 100mm Quantity of slabs: 4 Coverage per pack: 2.88 m2 The Rockwool RWA45, Prorox SL920 Slab Range is used for thermal, acoustic and fire insulation in multiple applications including floors, walls, roofs and industrial applications. The product range consists of high quality resin bonded slabs in a variety of thicknesses and densities. Rockwool Prorox is recognised as being the market leading acoustic insulation in applications such as conversions where it is used in floor or ceiling voids and in stud and party walls. It is specified by many of the market leading acoustic flooring manufactures as being an integral part of their own system. Excellent thermal, acoustic and fire Insulation - Water repellent - Easy to handle and install - Rockwool RWA45 Insulation Slabs have an A1 Euroclass fire rating ROCKWOOL RWA45 Insulation Slabs offer excellent thermal, acoustic and fire performance. The slabs are easy to handle and install. Rated Euroclass A1 non-combustible, RWA45 offers the highest level of fire resistance. RWA45 is a durable insulation solution which will maintain high performance over the lifetime of the building. The water repellent qualities of the insulation prevent moisture build up, damp and rot. Review: Make your own acoustic panels! - Ideal sound absorption and enough to make three 1200x600mm 200mm deep acoustic panels. Doubling up the 75mm battens to a depth of 150mm then leaving a 50mm air gap to the rear will help tame room-dimension related peaks in an audio listening room. Picture is of panels in first fit, covered in 150gsm calico cotton. In terms of the product, they arrived a little delayed but intact, and as an acoustically rated insulation are perfect as the absorption layer for a panel build like mine. For those that are interested, they seem to give useful absorption from around 100hz up, with less impact at sub-100hz frequencies (for those you will need deeper insulation, perhaps doubled up 100mm battens and/or a significantly deeper rear air gap. My three panels in total cost around £100 including 18mm MDF for the framing, and the cotton covering. Not perhaps the prettiest but these things never are, and if you are serious about treating a room you'll know that depth and area are important: the more of either the better! Review: Brilliant product but needs cutting to size.. - Great product, used in loft renovation but often needs cutting to size (ensure you purchase correct cutting knife / tool). Use a decent mask as fibres tend to break free when cutting.. ## Features - Excellent thermal, acoustic and fire Insulation - Rockwool RWA45 Insulation slabs have an A1 Euroclass fire rating - Water repellent - VAT Included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MYP9YFU | | Best Sellers Rank | 164,112 in DIY & Tools ( See Top 100 in DIY & Tools ) 18 in Insulation Wool | | Brand | Rockwool | | Coverage | thermal, acoustic, fire | | Customer Reviews | 4.4 4.4 out of 5 stars (29) | | Included Components | Rockwool RWA45 75mm | | Item Dimensions L x W | 120L x 60W centimetres | | Item Thickness | 75 Millimetres | | Item Weight | 8 Kilograms | | Manufacturer | buildermerchant.com | | Manufacturer Warranty Description | 30 days. | | Material | Stone wool | | Recommended Uses For Product | Thermal Insulation, Acoustic Insulation, Fire Resistance | ## Product Details - **Brand:** Rockwool - **Item thickness:** 75 Millimetres - **Material:** Stone wool - **Product dimensions:** 120L x 60W centimetres - **Recommended uses for product:** Thermal Insulation, Acoustic Insulation, Fire Resistance ## Images ![RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack) - Image 1](https://m.media-amazon.com/images/I/51KiFzJIkkL.jpg) ## Questions & Answers **Q: am I missing something or are these double the usual price at builder merchants?** A: Yes, you can get them cheaper. **Q: Does this keep outside noise from entering the room through the windows? (planning on building a barrier on the windows)** A: Hi "No". I think rockwool is more for... reducing cold air, for making rooms more warm but not really for reducing noise. It is often used in lofts to insulate, to make warmer. For noise solution, You may find a special "acoustic wool" online. Hope this helps **Q: can it be used as a thermal insulation** A: I bought this as a filler between air bricks to stop the draft. But they do breath. If you want thermal insulation on a large scale to do a room. I would have thought a thermal backed plaster board would be a better option. Like a dry linning board. Hope this helps. **Q: Does this keep outside noise from entering the room through the windows? (planning on building a barrier on the windows)** A: It will help but you would be better using heavy wooden shutters. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Make your own acoustic panels! *by J***C on 23 February 2026* Ideal sound absorption and enough to make three 1200x600mm 200mm deep acoustic panels. Doubling up the 75mm battens to a depth of 150mm then leaving a 50mm air gap to the rear will help tame room-dimension related peaks in an audio listening room. Picture is of panels in first fit, covered in 150gsm calico cotton. In terms of the product, they arrived a little delayed but intact, and as an acoustically rated insulation are perfect as the absorption layer for a panel build like mine. For those that are interested, they seem to give useful absorption from around 100hz up, with less impact at sub-100hz frequencies (for those you will need deeper insulation, perhaps doubled up 100mm battens and/or a significantly deeper rear air gap. My three panels in total cost around £100 including 18mm MDF for the framing, and the cotton covering. Not perhaps the prettiest but these things never are, and if you are serious about treating a room you'll know that depth and area are important: the more of either the better! ### ⭐⭐⭐⭐⭐ Brilliant product but needs cutting to size.. *by W***B on 5 January 2026* Great product, used in loft renovation but often needs cutting to size (ensure you purchase correct cutting knife / tool). Use a decent mask as fibres tend to break free when cutting.. ### ⭐⭐⭐⭐⭐ Great quality and next day delivery. *by M***M on 2 May 2025* Exactly as expected but delivered in a day, not in 7-8 days as predicted. Excellent service. Thank you. ## Frequently Bought Together - Rockwool RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack) - Rockwool RWA45 Acoustic Insulation Slabs | 100mm (2.88m2 per Pack) - Rockwool RWA45 Acoustic Insulation Slab 1200mm x 600 x 50 Millimetre 9 Pieces Per Pack. 6.48 Square Meters --- ## 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.be/products/65740140-rwa45-acoustic-insulation-slabs-75mm-4-32m2-per-pack](https://www.desertcart.be/products/65740140-rwa45-acoustic-insulation-slabs-75mm-4-32m2-per-pack) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-22*