Floor coatings

slider
Moisture Mitigation System

Moisture penetration through concrete slabs can cause severe problems for subsequent flooring systems. High concentrations of moisture and alkalinity (levels determined through testing) can lead to the deterioration of flooring adhesives and delamination of coatings by osmotic action. Even with relatively low moisture emissions (MVER), elevated alkalinity can compromise even the toughest flooring system adhesives. To avoid this problem the concrete slab should be primed with a material that will tightly bond to the concrete under these very adverse conditions.

KÖSTER VAP® 2000 is a special material which fulfils all of these functions; it has very low permeance (ASTM E96 wet: .04-.09), excellent bonding characteristics and is resistant to sustained high alkalinity (pH of 14). The KÖSTER VAP® 2000 vapor reduction system is applied to shot blasted, solid concrete substrates that are free of bond inhibiting substances. After curing, a covering layer (i.e. KÖSTER LF-VL) or any other type of final flooring may be applied. If an underlayment is required use KÖSTER VAP® Finish together with KÖSTER VAP® 06 Primer on top of the moisture mitigation system.

Always adhere to the specifications in the respective Technical Guidelines.

Moisture Mitigation System with Isolation Barrier

slider

KÖSTER VAP 2000 protects flooring systems against moisture and high alkalinity. For more than 16 years, this system has been successfully installed under all types of flooring to guard against osmotic blisters and other deleterious effects caused by moisture and / or high alkalinity.

Concrete floors which contain water soluble, unreacted sodium and / or potassium silicates usually can not be coated when certain thresholds of these compounds are exceeded. These unreacted silicates may come from a number of sources such as a floor hardeners, concrete polishing, integral additives, and some vapor reduction systems and may act as a bond breaker to any subsequently applied flooring system. In these cases the KÖSTER Self Leveling IB (Isolation Barrier) is applied to the concrete first in order to create an isolation barrier between substrate and the moisture mitigation system. The KÖSTER Self Leveling IB has self leveling properties which make it easy to apply. KÖSTER VAP 2000 is then applied on top of the cured isolation barrier. The special chemistry of the KÖSTER Self Leveling IB provides a permanent barrier against elevated levels of alkaline salts and concrete background moisture.

The prepared concrete substrate is edged using hand grinders with dust collection capabilities, the main floor is shot blasted to a “medium shot blast (CSP 4)” to remove all loose dust, old coatings, patch material, debris and any other deleterious or bond inhibiting substances. The floor is then cleaned of all fugitive shot and all residual dust is vacuumed up. The KÖSTER Self Leveling IB is applied to the concrete substrate at a spread rate determined by the moisture drive and level of contaminates identified in the substrate. After a 24 hour cure time the KÖSTER Self Leveling IB is then “brush blasted” to a “light shot blast (CSP 2)”. After residual shot and dust clean up, the KÖSTER VAP 2000 may be applied at the previously established spread rate as determined by moisture testing. Concrete floors which were formerly not suitable to receive a moisture mitigation system can now be coated and made fully accessible for any type of subsequent flooring system.

Always adhere to the specifications in the respective Technical Guidelines.

Oil Remediation System

slider

KÖSTER ORS is an oil-remediation and containment treatment process to rehabilitate and rescue oil or hydrocarbon contaminated concrete surfaces making them suitable to receive any type of flooring system. The KÖSTER Oil Remediation System (ORS) consists of two components:

– A cleaning system using a special detergent, KÖSTER ORS-D;
– An oil resistant primer coating, KÖSTER ORS-C, with a sand broadcast.

The KÖSTER ORS-D has the ability to penetrate deeply into the concrete surface to extract oil and hydrocarbon based compounds leaving a clean surface for the ORS-C coating. Both products combine to provide a dry, uncontaminated surface which is fit to receive flooring / coating systems.

Always adhere to the specifications in the respective Technical Guidelines.

Floor coatings which are exposed to moderate stresses

slider

Concrete floors exposed to moderate stresses are ideally and easily coated with the decorative floor sealant KÖSTER EM-VS. The coating is applied in two layers onto the prepared and cleaned concrete surface.

The surface protection of walls is easily done with KÖSTER Silicone Paint White.

Always adhere to the specifications in the respective Technical Guidelines.

Floor coatings which are exposed to heavy stresses

slider

Concrete floors which are exposed to heavy stresses are coated with KÖSTER LF-VL. KÖSTER LF-VL is applied to the prepared, dry, sound and solid substrate free of loose particles and bond inhibiting substances. By mixing KÖSTER LF-VL with quartz sand the coating achieves a high mechanical strength.

The surface protection of walls is easily done with KÖSTER Silicone Paint White.

Always adhere to the specifications in the respective Technical Guidelines.

Fast-setting self-leveling underlayment on mineral and non-absorbent substrates

slider
Whether installing flooring systems and coatings in new or existing buildings, substrates generally must first be levelled. The goal is to provide a level and highly resilient surface suitable for a broad variety of flooring systems. In order to achieve excellent bonding to the following underlayment, the prepared substrate is primed with KÖSTER SL Primer. KÖSTER SL Primer works as a bonding agent to provide a homogeneous absorbency and bind residual dust. It thereby guarantees a consistent and damage free substrate. KÖSTER SL Primer cures rapidly and is thus quickly recoatable. The leveling is then carried out with KÖSTER SL Premium in one working step in layer thicknesses between 2 and 15 mm; in depressions up to 30 mm. KÖSTER SL Premium is a high quality, self-leveling underlayment for the repair of concrete and existing coated floors. The material is characterized by a high compressive strength and cures with almost no shrinkage, thus preventing cracking. Due to its excellent flowability KÖSTER SL Premium is very easy and safe to work with. Additionally, KÖSTER SL Premium is suitable for non-absorbent substrates, e. g. on floors that have been protected with KÖSTER VAP I® 2000 for moisture control, on existing epoxy coatings or even tiles. As a bonding agent, KÖSTER VAP I® 06 Primer is used.  KÖSTER SL Premium allows for an early use after application: After 3 hours foot traffic is allowed, subsequent flooring systems can be installed after 5 hours, and after 24 hours curing time the material is even trafficable.

Self-leveling underlayment on wooden substrates

slider
Hardwood floors are often found in older buildings and present a difficult substrate for additional flooring surfaces during renovation. KÖSTER SL Flex is a mineral based underlayment for application to a wide variety of substrates including concrete floors, screeds, asphalt, steel, tile, or wooden floors. The material is flexible enough to accommodate the movements of the wooden surface as well as high localized pressure resulting from furniture or dropped items. Before installation the substrate has to be free of dust and bonding inhibiting substances. When applying over tongue and groove wooden floors, cleaning agent and care product residues such as wax must be completely removed, if necessary sanded off. Painted areas must be sanded and subsequently vacuumed. Floor boards must be firmly attached to the joists with screws. Open or wide joints between the boards, defects, and hollows have to be filled with an acrylic jointing compound. The prepared wooden surface is then primed with KÖSTER VAP I® 06 Primer. KÖSTER SL Flex stabilizes the substrate due to its high flexural strength. As a result, the substrate warps and bends less, allowing for the installation of rigid flooring materials such as tile.