Everbuild AC95 Acoustic Sealant

AC95 Acoustic Sealant & Adhesive is an intumescent acrylic sealant and adhesive specifically formulated for fire rated sealing and bonding applications on plasterboard and other kraft lined insulation boards. Provides up to 5 hours fire resistance, tested to BS 476, part 20/EN1366-4 (2006). Acoustic rated to BS EN ISO 140/3. Tested for air permeability to EN13141-1 Ventilation for buildings. Performance testing for components/products for residential ventilation.

You will also require Jumbo Sealant Gun.
Benefits

Forms a fire rated acoustic barrier - up to 5 hour fire rating - 25% greater than conventional/competitive fire rated sealants
Permanently flexible/high grab
Adheres to most surfaces
Mould resistant
Non flammable
Over-paintable
Easy clean up
Approx. 32 linear meters of coverage for a 6mm diameter bead.

Areas For Use

To form an acoustic and intumescent barrier by sealing gaps between plasterboard walls, floors and ceilings and dry lining applications.
As an adhesive to bond plasterboard to plasterboard and to bond plasterboard to wood and metal studding and direct to block work.
For sealing and bonding most other kraft lined insulation boards.

Limitations

Damp or humid conditions will significantly extend the cure time.
Do not attempt to abrade when cured.
Do not overpaint until product has fully cured. This will normally be 24 hours but may be 4-5 days in damp, cold or humid conditions.
Do not apply below 5øC.
For overhead boarding applications, always use in conjunction with mechanical fixings.

Surface Preparation
All surfaces must be clean and dust free.  All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application. Highly porous substrates such as new plaster should first be primed with Everbuild PVA bond diluted 1:4 with water. Surfaces may be slightly damp, but not wet. NOTE: THIS WILL SLOW THE CURE.
Application
Fit cartridge into a 1ltr mastic gun. Cut nozzle to required length and puncture inner membrane seal before applying.
Use as a sealant: Always cut nozzle to a size slightly larger than the gap to be sealed.. Apply to gap, slightly overfilling and finish smooth with a caulking tool or filler knife. Clean up any excess with a damp cloth within 30 minutes of application.
Use as an adhesive for direct bonding to large surfaces: Cut nozzle to provide a bead of approximately 9-10mm diameter, pierce inner membrane and apply a continuous bead to one surface at 250-350mm centres. Apply board immediately to surface and tamp down. Provide temporary support until cured.
Use as an adhesive for bonding to studding: Apply a continuous bead to studding and apply board immediately into position. Do not apply more than one board's width of studding at one time. Provide temporary support until cured.
Specific Data
 

Product Form
Ready to use thixotropic paste

Product Volume
900ml

Specific Gravity
1.57-1.6

Elongation at Break (%)
100-200%

Hardness (Shore A)

Approximately 40

Tack Free Time
15 to 60 mins, dependent on thickness, ambient temperature and humidity

Full Cure
1 to 5 days, dependent on thickness, ambient temperature and humidity

Solids Content
83%

Slump Resistance
No slump at 25øC when placed in a 20mm x 10mm vertical channel

Application Temperature Range
+5øC to +40øC

Service Temperature Range
-15øC to +70øC

Chemical Resistance

Dilute Acids  - Fair
Dilute Alkaline - Fair

Aliphatic Hydrocarbons - Fair
Aromatic Hydrocarbons - Poor

Movement Accommodation
Low to medium (+/- 7.5%)

Durability
Up to 15 years when used as recommended

Compatibility

Can be used in contact with most building and decorating materials but should not be used against bituminous materials.

 
FIRE TEST RESULTS - WALL SPECIMENS
 

Specimen

Gap Face Material Combination
Width/Depth (mm)
Backing Material
Integrity (mins)
Insulation (mins)

E

Aerated Concrete / Steel
30/15
PE Open Cell Foam
300
91

F

Aerated Concrete / Aerated Concrete
20/10
PE Open Cell Foam
300
300

G

Aerated Concrete / Aerated Concrete
10/10
PE Open Cell Foam
300
#

G

Aerated Concrete / Aerated Concrete
30/15
PE Open Cell Foam
300
215

 
 
FLOOR SPECIMENS
 

Specimen

Gap Face Material Combination
Width/Depth (mm)
Backing Material
Integrity (mins)
Insulation (mins)

A
Aerated Concrete / Aerated Concrete
30/15
PE Open Cell Foam
300
66

B
Aerated Concrete / Aerated Concrete
20/10
PE Open Cell Foam
300
133

C
Aerated Concrete / Aerated Concrete
10/10
PE Open Cell Foam
300
#

D
Aerated Concrete / Aerated Concrete
50/25
PE Open Cell Foam
300
215

 
# Evaluation against the insulation criteria of the standard could not occur due to the width of the specimen.
The overall test was discontinued after a period of 300 mins.
 
Health & Safety
Consult MSDS for full list of hazards
 
Storage
Store in cool dry conditions and protect from frost.