{"product_id":"everbuild-everflex-ac95-intumescent-acoustic-sealant-900ml","title":"Everbuild AC95 Intumescent Fire \u0026 Acoustic Sealant \u0026 Adhesive 900ml","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eEverbuild AC95 Intumescent Fire \u0026amp; Acoustic Sealant \u0026amp; Adhesive supplied in a 900ml cartridge. This is a high-strength, permanently flexible intumescent acrylic compound designed for sealing and bonding plasterboard and kraft-lined insulation boards in fire-rated and acoustic-controlled environments. \u003cbr\u003e\u003cbr\u003eIt combines the performance of a sealant and adhesive, forming a dense, resilient barrier that expands under fire exposure to maintain compartment integrity.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eWater-based and solvent-free, it is simple to apply, non-flammable, and easily cleaned with water during use. It achieves up to five hours of fire resistance when tested to EN1366-4:2006, offering a 25% performance increase over standard fire-rated sealants. \u003cbr\u003e\u003cbr\u003eOnce cured, it remains flexible and resistant to cracking, ensuring long-term acoustic and thermal stability in joint and panel systems.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003eWith a density of approximately 1.6 – 1.65 g\/cm³ and a Shore A hardness of around 40, AC95 provides a stable, smooth seal with low slump characteristics, even on vertical joints. \u003cbr\u003e\u003cbr\u003eIt performs reliably between –15 °C and +70 °C and maintains its integrity across a range of building materials including plasterboard, timber, metal, and blockwork.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eDesigned for professional fire-stopping, acoustic isolation, and adhesive bonding applications, Everbuild AC95 offers high grab, mould resistance, and a consistent finish that supports both performance and aesthetic continuity in building interiors. \u003cbr\u003e\u003cbr\u003eThe cartridge format provides a 900ml working volume.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh fire resistance\u003c\/strong\u003e: Provides up to 5 hours of fire-rated sealing performance when tested to EN1366-4:2006.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic barrier\u003c\/strong\u003e: Seals joints to minimise sound transmission between plasterboard walls, ceilings, and floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-purpose formulation\u003c\/strong\u003e: Functions as both an intumescent sealant and a strong bonding adhesive for plasterboard and insulation panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent flexibility\u003c\/strong\u003e: Retains elasticity to accommodate minor movement and prevent cracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater-based and solvent-free\u003c\/strong\u003e: Safe, non-flammable, and easy to clean up with water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent adhesion\u003c\/strong\u003e: Bonds to plasterboard, timber, metal, and blockwork without the need for primers on most substrates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMould resistant\u003c\/strong\u003e: Maintains a clean, durable finish in long-term installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow slump performance\u003c\/strong\u003e: No slumping in vertical joints up to 20 mm × 10 mm at 25 °C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range\u003c\/strong\u003e: Suitable for application between +5 °C and +40 °C; serviceable from –15 °C to +70 °C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCartridge size\u003c\/strong\u003e: 900ml capacity for large-area sealing and bonding applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlasterboard sealing\u003c\/strong\u003e: Forms an intumescent and acoustic barrier at board joints and perimeters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePanel bonding\u003c\/strong\u003e: Bonds plasterboard to plasterboard, timber, metal studding, or blockwork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation fixing\u003c\/strong\u003e: Adheres kraft-lined insulation boards in dry-lining systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire stopping\u003c\/strong\u003e: Seals service penetrations and linear joints to maintain fire compartment performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic isolation\u003c\/strong\u003e: Reduces airborne sound transmission in partition and ceiling interfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface preparation\u003c\/strong\u003e: Ensure surfaces are clean, dry, and free from dust or loose material; prime new plaster with diluted Everbuild 501 PVA Bond if required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication method\u003c\/strong\u003e: Fit the 900 ml cartridge into a 1 litre mastic gun; cut nozzle to suit joint width and pierce inner seal before use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs a sealant\u003c\/strong\u003e: Apply a slightly overfilled bead, smooth with a caulking tool or filler knife, and remove excess with a damp cloth within 30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs an adhesive\u003c\/strong\u003e: Apply a continuous 9 - 10 mm bead at 250 - 350 mm centres, press boards firmly into place, and support until cured.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCuring time\u003c\/strong\u003e: Allow 1 - 5 days for full cure depending on thickness, temperature, and humidity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverpainting\u003c\/strong\u003e: Wait until the sealant is fully cured before painting - typically 24 hours, or up to 5 days in damp or cold conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire rating\u003c\/strong\u003e: Tested to EN1366-4:2006 - 5 hour fire-resistant performance verified by Warrington Fire Research, Report No. 181967 (May 2009).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic rating\u003c\/strong\u003e: Compliant with BS EN ISO 140\/3 for sound insulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVentilation test\u003c\/strong\u003e: Conforms to EN13141-1 for air permeability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJoint compound classification\u003c\/strong\u003e: EN13963 Type 4a.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealant standard\u003c\/strong\u003e: EN15651-1:2012 Type F-INT for interior fire-resistant applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical base\u003c\/strong\u003e: Ready-to-use, thixotropic, water-borne acrylic formulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness and density\u003c\/strong\u003e: Shore A ≈ 40; density ≈ 1.6 – 1.65 g\/cm³.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement capability\u003c\/strong\u003e: ± 5 % with low slump behaviour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage\u003c\/strong\u003e: Keep in cool, dry conditions; protect from frost. Shelf life 12 months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Do not use in contact with bituminous materials or cPVC piping; always ensure adequate ventilation during curing and follow fire-stopping regulations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Everbuild","offers":[{"title":"Default Title","offer_id":53771414372463,"sku":"1003013","price":8.62,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Everbuild_Everflex_AC95_Intumescent_Acoustic_Sealant_-_Photo.png?v=1783758343","url":"https:\/\/supplyyard.co.uk\/products\/everbuild-everflex-ac95-intumescent-acoustic-sealant-900ml","provider":"Supply Yard","version":"1.0","type":"link"}