A question that keeps being asked by many of our customers is which adhesive to use for an installation of Karndean Flooring. The first and foremost answer is that it should be a Karndean branded adhesive, as use of any other brand will render the Lifetime Warranty of your Karndean floor null and void. It then follows on to which type of Karndean Adhesive to use for which type of installation.
Karndean Epoxy Resin is a two-part mix. Both components should be mixed together with a drill and paddle to a smooth consistency and the contents poured out within 5 minutes of mixing time. If left within the container the resin will harden inside 15 minutes; on the floor you have up to one hour working time. It is recommended for use in areas subject to excessive moisture and temperature. Any areas under question consult the Karndean Technical team.
A 4kg tub will cover approximately 12m²
NOTE: Eye protection and gloves must be worn when working with this product.
High Temperature Adhesive
This is a modified Acrylic adhesive with an improved service temperature. It is designed for use in areas subject to excessive heat and direct sunlight (conservatories/shop windows/patio doors/external glass panel doors and under floor heating).
Puddles or streaks MUST NOT be left when applying the adhesive to the sub-floor. Any excess adhesive must be wiped off flooring immediately with a clean damp cloth. Karndean always recommend working section by section, as the product must be laid in wet adhesive. The open time is about 15 minutes, depending on atmospheric conditions on site.
A Karndean High Temperature 15ltr tub will give an approximate coverage of 50m² and a Karndean High Temperature 5ltr tub 17m². This product has been pretty much superseded by the Universal Adhesive below.
This is a resin free fibre-reinforced wet-bed high temperature dispersion adhesive for use indoors. This product is perfect for use on most absorbent surfaces that are level and sound. For use as with the High Temperature Adhesive and is easy to apply has a good open time.
Footnote on Conservatories:
If the area concerned may be subject to extremely excessive direct heat (50˚C or more), such as a fully glazed south facing conservatory, then the floor must be installed with Epoxy Adhesive. It is vitally important to keep the temperature in these rooms at a constant 18˚C – 26˚C before, during and for 24hrs following installation. It would also be prudent to shade all windows in order to maintain constant temperatures for 48hrs following installation.
Pressure Sensitive Adhesive
The Pressure Sensitive Adhesive is great for use in most normal residential and commercial installations. It is best used as a semi-dry/tack, and once in this state you will have about 2 hours working time.
This product comes in 3 sizes. The Karndean Pressure Sensitive 15ltr tub will give approximately 60m² coverage, a Karndean Pressure Sensitive 5ltr tub 20m² and the Karndean Pressure Sensitive 2.5ltr tub will give approximately 10m².
Last but not least is the Acrylic Adhesive which is ideal for use in most normal residential and commercial installations. Karndean always recommend that the installer works section by section with this product as the flooring must be wet bonded when installed with it. Acrylic Adhesive has an open time of approximately 15 minutes depending on atmospheric conditions on the site.
This is just a brief guide to which Karndean Adhesive would be best suited to your installation, and is by no means exhaustive. Reference has been taken for the above from the Karndean Technical notes on the adhesives. If you have any doubts, always consult your professional fitter or otherwise the Karndean Technical team would be able to answer your questions and they can be contacted using the information given on the Karndean Website