Everbuild AC95 Intumescent Fire & Acoustic Sealant & Adhesive 900ml
Nationwide Delivery
Wed 24 Jun
- 0days
- 18hrs
- 47mins
- 21secs
BULK SAVING
Nationwide Delivery
Wed 24 Jun
- 0days
- 18hrs
- 47mins
- 21secs
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Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
| Screws & Fixings and Adhesives & Sealants | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £75 | £7.50 ex. VAT |
| Over £75 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £90 ex. VAT |
| Over £400 ex. VAT | £55 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
How delivery works
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
- Deliveries are typically kerbside.
- Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
- Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
Key Features
- {{shield}} 5 hour fire-resistant performance
- {{local_fire_department}} Fire-stopping, acoustic isolation, and adhesive bonding
- {{fitness_center}} Mould resistance
- {{fact_check}} For use with plasterboard and kraft-lined insulation boards
Technical Specification
| URN: | 1003013 |
|---|---|
| Brand: | Everbuild |
| Size: | 900ml |
| Sales Unit: | Each |
| Manufacturer's Reference: | AC95900 |
Technical Downloads
Product Overview
Everbuild AC95 Intumescent Fire & Acoustic Sealant & 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.
It combines the performance of a sealant and adhesive, forming a dense, resilient barrier that expands under fire exposure to maintain compartment integrity.
Water-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.
Once cured, it remains flexible and resistant to cracking, ensuring long-term acoustic and thermal stability in joint and panel systems.
With 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.
It performs reliably between –15 °C and +70 °C and maintains its integrity across a range of building materials including plasterboard, timber, metal, and blockwork.
Designed 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.
The cartridge format provides a 900ml working volume.
Features & Benefits
- High fire resistance: Provides up to 5 hours of fire-rated sealing performance when tested to EN1366-4:2006.
- Acoustic barrier: Seals joints to minimise sound transmission between plasterboard walls, ceilings, and floors.
- Dual-purpose formulation: Functions as both an intumescent sealant and a strong bonding adhesive for plasterboard and insulation panels.
- Permanent flexibility: Retains elasticity to accommodate minor movement and prevent cracking.
- Water-based and solvent-free: Safe, non-flammable, and easy to clean up with water.
- Excellent adhesion: Bonds to plasterboard, timber, metal, and blockwork without the need for primers on most substrates.
- Mould resistant: Maintains a clean, durable finish in long-term installations.
- Low slump performance: No slumping in vertical joints up to 20 mm × 10 mm at 25 °C.
- Temperature range: Suitable for application between +5 °C and +40 °C; serviceable from –15 °C to +70 °C.
- Cartridge size: 900ml capacity for large-area sealing and bonding applications.
Applications
- Plasterboard sealing: Forms an intumescent and acoustic barrier at board joints and perimeters.
- Panel bonding: Bonds plasterboard to plasterboard, timber, metal studding, or blockwork.
- Insulation fixing: Adheres kraft-lined insulation boards in dry-lining systems.
- Fire stopping: Seals service penetrations and linear joints to maintain fire compartment performance.
- Acoustic isolation: Reduces airborne sound transmission in partition and ceiling interfaces.
Installation Guidance
- Surface preparation: Ensure surfaces are clean, dry, and free from dust or loose material; prime new plaster with diluted Everbuild 501 PVA Bond if required.
- Application method: Fit the 900 ml cartridge into a 1 litre mastic gun; cut nozzle to suit joint width and pierce inner seal before use.
- As a sealant: Apply a slightly overfilled bead, smooth with a caulking tool or filler knife, and remove excess with a damp cloth within 30 minutes.
- As an adhesive: Apply a continuous 9 - 10 mm bead at 250 - 350 mm centres, press boards firmly into place, and support until cured.
- Curing time: Allow 1 - 5 days for full cure depending on thickness, temperature, and humidity.
- Overpainting: Wait until the sealant is fully cured before painting - typically 24 hours, or up to 5 days in damp or cold conditions.
Compliance & Performance
- Fire rating: Tested to EN1366-4:2006 - 5 hour fire-resistant performance verified by Warrington Fire Research, Report No. 181967 (May 2009).
- Acoustic rating: Compliant with BS EN ISO 140/3 for sound insulation.
- Ventilation test: Conforms to EN13141-1 for air permeability.
- Joint compound classification: EN13963 Type 4a.
- Sealant standard: EN15651-1:2012 Type F-INT for interior fire-resistant applications.
- Chemical base: Ready-to-use, thixotropic, water-borne acrylic formulation.
- Hardness and density: Shore A ≈ 40; density ≈ 1.6 – 1.65 g/cm³.
- Movement capability: ± 5 % with low slump behaviour.
- Storage: Keep in cool, dry conditions; protect from frost. Shelf life 12 months.
- Important note: Do not use in contact with bituminous materials or cPVC piping; always ensure adequate ventilation during curing and follow fire-stopping regulations.
