AC 350

Universal acrylic adhesive in water dispersion for resilient floor coverings

Product Description

• AC 350 is an acrylic adhesive in water dispersion easily applicable, white paste for application in a single coating.
• AC 350 is not inflammable and contains no toxic substances.
• AC 350 has good initial tack and after approx. ten minutes is ready to receive all types of non-moisture sensitive resilient and woven floor and wall coverings, provided the support is somewhat absorbent.
• Open time is approx. 20-30 minutes at +23°C.
• After drying the AC 350 film is flexible with extremely high cohesion and bonding.

Field of Application

• Semi-flexible vinyl flooring;

• Natural or synthetic felt-backed vinyl;

• Synthetic jute-backed linoleum flooring;

• PVC-backed cork;

• Coconut-fiber flooring with latex-primed back;

• Foam-backed, polyurethane-, PVC foam, rubber, synthetic jute-backed, polypropylene, non-woven polyester-backed tufted carpet;

• Latex- and foam backed needle punch woven flooring;

• Wall coverings in PVC and rigid PVC sheets;

• PVC-film backed or resin-bonded needle punch, provided they are not moisture-sensitive.

Product Details

Product identity

Consistency: pasty
Color: Beige
Bulk density (kg/m³): 1400
Viscosity: 120,000 (Rpm 5, Spindle 7)
Dry solids content (%): 70


AC 350 is supplied in:
- 25 kg plastic bucket.
- 15 kg plastic bucket.
- 5 kg plastic bucket.


Approximately 0.3 – 0.5 kg/m2 according to the notched trowel

Application Procedure

Preparation of the substrate

The substrates must be cured and sufficiently dry, mechanically strong, free from loose particles, grease, oils, paint, wax, etc. The cement substrates must not be subject to shrinkage after installing the wood. The moisture content of the screed must be lower than the maximum prescribed by the parquet manufacturer. It is necessary to check moisture content throughout the entire thickness of the substrate, using a carbide hygrometer. During spring and summer, renders must be cured for at least one week for every centimeter of thickness, and cement screeds must be cured for at least 28 days unless they have been made with DCI special binders for screeds such as Screed 80, Level S10, or with Level S30. In case of floating screeds over insulation or light weight layers and slabs on grade must be provided with a vapour barrier to prevent rising damp.
Existing ceramic tile has to be thoroughly clean and degrease before proceeding to bond. Adhesion of the flooring may be improved by applying a layer of Primer EP-PU as adhesion promoter prior the installation.
In case of old wooden floors has to be make sure that the planks of the old floor are well-bonded to the substrate. Remove any varnish or wax from the surface of the floor with sandpaper down to a bare wood finish and remove all dust with a vacuum cleaner.
On anhydrite substrates the surface must be sanded and primed with Primer PU or Primer PU Fast.

Preparing the product

AC 350 is ready to use the product but is suggested to mix the adhesive for homogenization.

Applying the product

Apply AC 350 to the substrate using a notched trowel suitable to the format. The open time of the product is maximum 30 minutes under normal temperature and humidity conditions, which must be taken into consideration when spreading the adhesive. If a skin forms, the adhesive must be removed and replaced.


Leave a short waiting time up to 10 minutes according to the application quantity, climatic conditions, substrate absorbency and type of covering. Make sure not to exceed open time 20-30 minutes in order to ensure proper wetting of the back of the covering. Lay in covering while the adhesive is still wet: the adhesive ridges have to be impressed. Take care to avoid air pockets and carefully rub the floor covering down to ensure good adhesive transfer to the backing. Avoid excessive stress on joints. After some minutes of installing the floor covering, it is always necessary to carefully roll it down again or to firmly rub it down.