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PREPARATION

For better handling, lay FLEXX SLATETM panels flat and let them acclimate to room temperature 24 hours before installing.

Remove all dirt, dust, grease and any other loose debris from the building element’s surface prior to applying the adhesive. Make sure the surfaces are sound, even and thoroughly dry. Both physical or/and chemical treatment can be used for a perfect cleaning.

Whenever a primer or solvent is recommended by the adhesive manufacturer, the bond must be tested by the installer prior to final installation.

For new construction with new drywall be sure to prime the surfaces with recommended primers first. Drywall dust is like dirt and, if not properly prepared, bad adhesion will occur.

Concrete and masonry substrates must be at least 28 days old. Hydrostatic pressure conditions and vapor transmission cannot exceed 3 lbs. per 1,000 sq. ft. (1,36 kg per 92,9 m2) per 24 hours using a calcium chloride test (reference ASTM).

Whenever a primer or solvent is recommended by the adhesive manufacturer, the bond must be tested by the installer prior to final installation.

Depending on the adhesive used, it may be necessary to prepare the back of the Flexx Slate Panels by sanding or scuffing the back to expose the fiberglass.

If needed, use a straight trowel for back-filling of voids. Any bumps in the back surface should be sanded flat prior to back-filling. The back of Flexx Slate Panels may require a filler type adhesive to back-fill or level out voids of the natural slate sheets. It is always best to back-fill or back-butter voids or depressions in the material before application to a substrate.

If the application is outdoors, consideration to thermal expansion should be taken into account. Since Flexx Slate Panel is micro thin, it must expand and contract the same as the substrate to which it is applied or de-lamination may occur.

A preliminary dry fit of Flexx Slate Panels allows for arrangements and orientation of individual sheets, patterns, textures, and colors before final placement. It is recommended that each sheet be dry fit exactly where it will be placed on horizontal or vertical surfaces. Numbering the sheets to track relocation before cutting and trimming is recommended and will save time.

CUTTING AND DRILLING

Cut and fit materials before applying adhesive. The use of metal shears is recommended for cutting Flexx Slate Panels. However, cutting straight lines and curves using long nosed tin snips would work as well.

FlexxSlate_Cutting

Flexx Slate Natural Stone Panels can also be cut with strong scissors, wet saw, or table saw with carbide/diamond blade. For drilling and routing use tools for wood or stone. Leave a small gap under the molding for expansion and follow panel manufacturer’s recommendations.

Cutting

IMPORTANT: For a seamless cutting and to avoid flaking, always cut the material with the stone coat facing downward.

INSTALLATION

Spread the adhesive over the substrate, using a V-notched trowel 3/16” wide x 1/4″ deep. A different method is to use a manual or pneumatic gun to apply the adhesive directly on the back of the panels, forming several 1/4″ – 3/8″ zigzag beads.

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Complete coverage of the veneer backing is necessary for a secure bond (refer to adhesive instructions).

Position and firmly press panels to the bonding surface. Starting in the center of the sheet and using a roller or hand pressure, work any trapped air out towards the edge of the sheet. 

TIPS:

1) When applying edge to edge, it is advisable to sand the edges to insure smooth transitions.

2) When installing stone panels around an outer corner where two walls meet, the raw edges of the tiles can be concealed and have a clean transition by beveling the two pieces. Beveling on a stone panel is the method of angling the edge of a tile back to 45-degrees on its underside. When two tiles beveled at 45 degrees meet at a corner, they wrap around it to form a 90-degree outside angle. Once installed, sand the edge to leave a smooth finishing.

TRANSLUCENT PANELS

For best results with back light installation of our translucent panels, we recommend using LED strips, placed at about 3″ behind the sheet, in paralleled rows fixed at 1.8″ from each other, approximately. This way, you will enjoy a warm and evenly distributed light through the entire surface. The panel can be applied on top of a thin perimeter frame made out of aluminum or wood profiles. Also, you can create different visual effects playing with distinct colors of the LED strips.

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FLOORING

As flooring, FLEXX SLATE® is great in wet areas and feels great to walk on. Finished floors look beautiful and are a non-slip surface. FLEXX SLATE® can be used for flooring if the proper adhesive and installation techniques are applied. Since FLEXX SLATE® is not a thick solid stone it is not recommended for high traffic areas, due to erosion. It can be used for low traffic flooring areas such as residential areas or bathrooms (where wet traction is expected).

For the application on floors this material requires a suitable sealer (a 2 component PU sealer is highly recommended).

For new installations, FLEXX SLATE® is best adhered over most standard sub-floor materials such as cement board and backer board usually in the ½” to ¼” thickness range. Using a layer of cement board or backer board over wood floors will result in a more solid feel to the finished floor. This can further help with crack prevention in some cases.

SEALING

Depending on usage, natural stone requires different surface protection coatings like glossy, matte, environment protective, anti-static, fire retardant coatings, or water sealants. It is recommended that Flexx Slate Panels be sealed in the same manner as most slate and/or stone tiles are. Please follow manufacturer’s instructions for best results.

Some colors of FLEXX SLATE® offer better traction than others. For example, “Copper” or “Burning Forest” will have more texture than some of the other softer slate colors. Sealers will have an effect on the traction of the surface of each FLEXX SLATE® color. Therefore, it is recommended that various sealers be tested prior to final installation when considering FLEXX SLATE® especially for flooring.

It is best to pre-seal the natural stone sheets prior to installation. This protects and seals the face from adhesives and grouts during installation and handling. As sealants are offered in varying degrees of luster or sheen, we recommend that you confirm the reflectance prior to complete installation to get the desired effect.

Here and here are a couple of useful articles regarding the selection and application of a proper sealant.

GROUT JOINTS

GroutOptionally, Flexx Slate Panels can be used to create a tiled effect by leaving a grout joint between cut pieces of material. Sheets may also be butt-jointed for the look of a smaller seam. Due to the thin nature of the Flexx Slate Panels, a 1/8″ to 3/16″ grout joint will produce better results. Epoxy grouts are the most recommended and available in many colors to match or coordinate with the different colors of Flexx Slate Panels. Finally, clean up the epoxy with a sponge.

RECOMMENDED ADHESIVES

It is the installer’s responsibility to make sure the adhesive fits for the type and conditions of the materials to be bonded together.

FLEXX SLATE Panels backing is a non-porous material. The adhesive you choose should be either for “non-porous” to “porous” or for “non-porous” to “non-porous” materials bonding, depending on your substrate. Also, both the operating and the service temperature range have to be taken into account when selecting the right adhesive for you project. Please, read carefully the manufacturer’s recommendations.

A single-component thixotropic polyurethane adhesive is best for most of the applications – interior and exterior. Sikabond Construction Adhesive and Sikaflex 11FC are among the best adhesives for the Flexx Slate Panels as they are flexible, paintable and work for almost all kind of substrates and conditions: cement-based materials, brick, ceramics, glass, metals, wood, epoxy, polyester and acrylic resin.

TITEBOND offers a wide range of adhesives specific for any material, especially for trowel applications.

For porous substrates:

  • Titebond Green Choice Fast Grab FRP Adhesive (1 gal, 3.5 gal & 4  gal pails)
  • Titebond Green Choice Heavy Duty Construction Adhesive (10.5oz or 29oz cartridge & 3.5 gal pail)

For non-porous substrates:

  • Titebond Green Choice Advanced Polymer Panel Adhesive (3.5 gal pail) 
  • Titebond Green Choice Premium Polyurethane Construction Adhesive (10.5 oz & 29 oz cartridges)

Other adhesive examples may include: different polyurethane adhesive (like Mapeflex P1Loctite PL Premium Construction Adhesive or PL 530, wood glues, Ultrabond ECO 905), thick latex-type adhesives (use ONLY where air-drying can take place), construction grade multi-purpose adhesives (e.g. “Liquid Nails Panel & Foam”).

The back of the Flexx Slate Panels may require a filler-type adhesive in some cases (or polyester-based gap filler putties like Bondo and similar). Polyurethane wood glues work well for most applications to board materials by foaming slightly to fill gaps.

NOTE: Contact adhesives are NOT recommended due to the uneven backing of Flexx Slate Panels.

SAFETY PRECAUTIONS

Precautions must be taken when working with Flexx Slate Panels due to the fiberglass composition in the backing materials. When using a saw, ALWAYS be sure to take proper precaution to cover skin, eyes and nose from fiberglass dust. When cutting Flexx Slate Panels with saws, grinders, or sanders, ALWAYS properly filter exhaust equipment.

Avoid breathing silica dust. This product when cut, drilled, or abraded produces dust containing Free Silica which may cause cancer or delayed lung injury (Silicosis) if inhaled. Work in a well ventilated area. Please wear safety glass and a dust mask.

CARE

All natural stone surfaces, even if it is impregnated (sealed), must be wiped moist regularly. The care cleaner should be mixed with water and then mopped over the floor.

Some FLEXX SLATE variations have more texture than others and may constitute a rough surface, creating cleaning challenges, because dirt and other contaminants lodge in the surface. Extra attention is necessary to assure contaminants are removed promptly.

Do not use acid cleaners as they attack the surface of the stone!

Reapply sealer every 4-6 years to keep FLEXX SLATE panels in good condition for a lifetime.

For more information, you may wish to read this useful article.

RECOMMENDED INSTALLERS - LOCATIONS

If you are looking for an experienced installer in your area, we may be able to recommend someone. Here are some locations where you can count on professional service:

  • AR – Hot Springs, Little Rock area
  • CA – Yucaipa, San Bernardino, (Los Angeles area)
  • GA – Atlanta
  • MI – Ypsilanti, Ann Arbor, Detroit area
  • OR – Portland
  • VA – Winchester area

If you think you need it, call or drop us a line and we will help you communicate with the right person. Put your product in good hands!

IMPORTANT NOTICE

All users of FLEXX SLATE® products are solely responsible for compliance with local building codes and guidelines.

The information herein is offered in good faith based on FLEXX SLATE’s most updated researches and it is believed to be accurate. FLEXX SLATE® keeps the right to modify the specification without previous notice.

If you have any doubt or need more detailed information, please contact our Technical Support team.

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