--- product_id: 51302969 title: "Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml" brand: "sika" price: "¥4648" currency: JPY in_stock: true category: "Sika" url: https://www.desertcart.jp/products/51302969-everbuild-everflex-ac50-contract-acoustic-sealant-and-adhesive-white-380 store_origin: JP region: Japan --- # Mould resistant & water resistant Certified acoustic barrier (S EN ISO 140/3) High strength & permanent flexibility Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml **Brand:** sika **Price:** ¥4648 **Availability:** ✅ In Stock ## Summary > 🔇 Seal the noise out, lock the comfort in! ## Quick Answers - **What is this?** Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml by sika - **How much does it cost?** ¥4648 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/51302969-everbuild-everflex-ac50-contract-acoustic-sealant-and-adhesive-white-380) ## Best For - sika enthusiasts ## Why This Product - Trusted sika brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Professionals:** Top-rated with 4.3 stars and proven reliability on diverse substrates. - • **Mould & Moisture Resistant:** Keeps your walls pristine and protected in humid environments. - • **Easy Application & Finishing:** Compatible with standard caulking guns and overpaintable for seamless integration. - • **Dual-Action Sealant & Adhesive:** Bonds plasterboard, wood, metal, and blockwork with lasting flexibility. - • **Unmatched Acoustic Performance:** Creates a certified soundproof barrier for quieter, more comfortable spaces. ## Overview Everbuild Everflex AC50 is a premium 380 ml white acrylic sealant and adhesive designed for professional use. It offers high strength and permanent flexibility, certified acoustic barrier performance to S EN ISO 140/3, and resistance to mould and moisture. Ideal for bonding plasterboard, wood, metal, and blockwork, it applies easily with standard caulking guns and is overpaintable, making it the go-to solution for soundproofing and sealing in modern construction. ## Description Shop Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml. Free delivery on eligible orders of £20 or more. ## Features - Contains a mixture of 5-Chlor-2-methyl-2H-isothiazol-3-on und 2-Methyl-2H-isothiazol-3-on (3:1) (CIT/MIT). May produce an allergic reaction. - Suspected of damaging fertility or the unborn child. - High strength, permanently flexible acoustic sealant and adhesive - When used as an adhesive the formula bonds plasterboard to plasterboard and other common substrates including blockwork, wood and metal studding - When used as a sealant this formula remains permanently flexible whilst being resistant to mould, non flammable and over paintable - Using Everbuild Everflex AC50 as both a sealant and a adhesives in a area creates an acoustic barrier to S EN ISO 140/3 standard when applied correctly - Apply using a caulk, sealant / adhesive cartridge application gun, we recommend the Everbuild Power Pro Heavy Duty Sealant / Adhesive Cartridge Applicator Gun ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0012RLYJ6 | | Best Sellers Rank | 12,411 in DIY & Tools ( See Top 100 in DIY & Tools ) 253 in Sealers | | Brand | Sika | | Colour | White | | Compatible Material | Plasterboard, Kraft Lined Insulation Boards, Common Substrates, Most Surfaces | | Customer Reviews | 4.4 4.4 out of 5 stars (527) | | Global Trade Identification Number | 05029347600358, 05029347903268 | | Item Dimensions | 32 x 38 x 254 millimetres | | Item Form | Paste | | Item Weight | 0.64 Kilograms | | Manufacturer | Sika Everbuild | | Manufacturer Contact Information | Sika Everbuild 41 Knowsthorpe Way, Leeds LS9 0SW | | Manufacturer Part Number | AC50C4 | | Material | Acrylic | | Model Number | AC50C4 | | Number of Items | 12 | | Number of Packs | 1 | | Style Name | Compact | | Surface Recommendation | Wall | | Unit Count | 380.0 millilitre | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Sika - **Item dimensions L x W x H:** 32 x 38 x 254 millimetres - **Item weight:** 0.64 Kilograms - **Material:** Acrylic - **Style:** Compact ## Images ![Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Image 1](https://m.media-amazon.com/images/I/317soPlJAZL.jpg) ![Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Image 2](https://m.media-amazon.com/images/I/512oJWS3YGL.jpg) ![Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Image 3](https://m.media-amazon.com/images/I/51H5Tqr+m-L.jpg) ![Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Image 4](https://m.media-amazon.com/images/I/51mPqpc9jQL.jpg) ![Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Image 5](https://m.media-amazon.com/images/I/41GvZyOG-oL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Is the can 400 ml or 900 ml?** A: This is the C4 400ml tube. **Q: Could I use this to attach sound proofing matt directly to a plaster board wall? Thanks in advance for any help offered** A: Yes, it's not only a flexible sealant but it's also an adhesive specifically formulated for sealing and bonding plasterboard and other Kraft lined insulation boards. **Q: Is this 100% silicone?** A: Not like any 100% silicone I have ever used. It is more like a mud but unlike silicone does not cure throughout the bead. It has a cure on the outside crust but has an elastic type slower cure in the middle to allow for acoustic bounce and absorption. I have removed some previous acoustic work and the beading is still tacky on the thicker beads after many months following installation. It does grab however I would not trust it to hold any weighty objects **Q: Can i use on the outside of my shed to seal gaps between wood joints?** A: No. Sorry it will dissolve and run off in rain. ## Frequently Bought Together - Everbuild Everflex AC50 Contract Acoustic Sealant and Adhesive, White, 380 ml - Advanced Acoustics Premium Mass Loaded Vinyl Soundproofing Mat - 1.25m x 3m - 5kg/sqm - 2mm Thin - Everbuild Stick 2 All Purpose High Bond Strength Contact Spray Adhesive, 500 ml, Beige --- ## 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/51302969-everbuild-everflex-ac50-contract-acoustic-sealant-and-adhesive-white-380](https://www.desertcart.jp/products/51302969-everbuild-everflex-ac50-contract-acoustic-sealant-and-adhesive-white-380) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-11*