Sika Acoustic Matt
Sika Acoustic Matt
Sound Insulating System for Timber Flooring
Description The Sika Acoustic Matt system consists of the sound dampening one
component adhesive SikaBond-T55 (J) and the Sika Acoustic Rubber Matt.
Uses The Sika Acoustic Matt is used to bond timber floors in residential office and
industrial buildings. The system provides a sound dampening effect
improving the acoustic insulation of a room.
Advantages Reduced noise and vibration transmission.
Low floor zone thickness.
Remains permanently flexible.
Thin construction with high performance.
Simple and easy to install.
Available in a variety of sheets sizes strips or pads.
Resists ageing and deformation.
Consistent density and thickness for maximum performance
Use of Australian recycled rubbers.
Instructions for Use
Surface Preparation All surfaces must be clean dry sound and free from dust and loose particles.
Paint laitance and other poorly adhering particles must be removed by
grinding. Standard construction rules or the timber manufacturers or the
timber manufacturers instructions regarding moisture content of concrete
cement screeds or wooden substrates must be observed.
Concrete/cement screed substrate: No preparation is necessary on a dry
dense wearable substrate. For other substrate conditions the floor must be
grinded and thoroughly cleaned with an industrial vacuum cleaner.
(Important: Pre-Trials absolutely necessary)
Other substrates: In case of flowable screeds and other unknown substrates
we recommend that you consult your local Sika Technical Representative.
Priming The moisture content should be measured in accordance with the Floor
Coverings Standard AS1884-1985. A method of testing concrete moisture is
given in the appendix of this standard.
When the moisture content of the concrete is found to be below 5.5% the
substrate is considered suitable for SikaBond-T55 (J) to be applied without a
When the moisture content of the concrete is found to be between 5.5% and
10% Sika Primer MB must be used as a primer before applying SikaBond-
When the moisture content of the concrete is greater than 10% EpoCem
(Sikafloor-81 or Sikagard-720) should be used as a temporary moisture
barrier. Sika Primer MB should then be used as a prime coat before applying
When priming with Sika Primer MB a continuous visible film of cured epoxy
must be observed on the surface. The application rate will depend on the
porosity of the substrate.
Application Sausage: Place the sausage in the application gun and snip off the end. Cut
the tip off the nozzle to suit the application and apply the adhesive with
suitable hand or compressed air gun.
Pail: Remove lid off pail and cut open foil liner. Once opened the entire
contents of the pail should be used within a short period of time.
Do not apply SikaBond-T55 (J) at temperatures below 5°C or above 35°C.
The optimum temperature for substrate and adhesive is between 15°C and
The adhesive should be applied over a large surface areas with a notched
spreader (notch depth approx. 6mm to achieve 4mm head height). The
coverage will vary from 800ml to 1000ml per m². Avoid air entrapment when
making the bond or filling joints.
Construction Sika Acoustic Matt
Application (continued) Apply firm pressure when bringing the Acoustic Matt in contact with the
SikaBond T55 (J). After twelve hours of application of the Acoustic Matt
screed another layer of Sikabond T55 (J) to the Matt and apply timber
planks. Keep the components under pressure for at least 3 hours until the
adhesive has partially cured.
For application details of timber flooring systems contact the timber
Technical Data (Typical)
1. Sika Acoustic Matt
Type Prefabricated medium density rubber underlay designed for noise and
vibration insulation and resilience.
Density 600 – 850 kg/m3
Thickness 3 or 5 mm
Dimensions 3 mm 1.2 m x 15 m roll
5 mm 1 m x 1 m
2. SikaBond T55 (J)
Type One part polyurethane
Density 1.35 kg/litre
Tack Free Time Approximately 90 minutes (at 23°C & 50% r.h)
Rate of Cure 3 mm in 24 hours (at 23°C & 50% r.h)
Shore A 38 (DIN 53505)
Tensile Strength >1.5 MPA (DIN 53504)
Tensile Shear Strength >1.0 MPA (DIN 281)
Elongation at Break >400% (DIN 53504)
Service Temperature -40°C & +80°C
Packaging 600 ml sausage 2 kg sausage 16 kg pail
Important Notes Floors can be walked on 24 hours after installation (no traffic or heavy
concentrated loads). The floor is fully serviceable after 48 hours.
For proper curing of the SikaBond-T55 (J) it must be allowed to
moisture cure (i.e. either from the substance or the air).
SikaBond-T55 (J) should not be used on polyethylene polypropylene
Teflon & other plasticised synthetic materials. (Trials should be
conducted if in doubt).
Consult Sika Primer MB Technical Data Sheet for detailed priming
Timber flooring systems should be allowed to acclimatise to the
environment it is to be placed in to allow for expansion and shrinkage
problems that may occur. Refer to the timber manufacturers
installation and design procedures.
Important Notification The information and in particular the recommendations relating to the application
and end-use of Sikas products are given in good faith based on Sikas current
knowledge and experience of the products when properly stored handled and
applied under normal conditions. . In practice the differences in materials
substrates and actual site conditions are such that no warranty in respect of
merchantability or of fitness for a particular purpose nor any liability arising out of
any legal relationship whatsoever can be inferred either from this information or
from any written recommendations or from any other advice offered. The
proprietary rights of third parties must be observed. All orders are accepted
subject of our terms and conditions of sale. Users should always refer to the most
recent issue of the Technical Data Sheet for the product concerned copies of
which will be supplied on request.
PLEASE CONSULT OUR TECHNICAL DEPARTMENT FOR FURTHER