‪Installation Guidelines‬

Below are our recommended installation guidelines. For convenient printing, there is also a downloadable PDF version of this document at the bottom of the page. Also below is a PDF of the grout caulking colors that we stock.

Layout & Patterns

Preparation of the area to be covered and the layout of the Stüning™ Stone natural stone veneer sheets is the same as for natural stone or tile. Time spent preparing the work area will pay off immensely. A preliminary dry fit of Stüning™ Stone 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 straight lines and curves is best done using long nosed tin snips. Stüning™ Stone can also be cut with a metal shear, strong scissors, wet saw, or table saw with carbide blade.


It is best to pre-seal Stüning™ Stone sheets prior to installation. This protects and seals the face from adhesives and grouts during installation and handling. Stüning™ Stone can be sealed with the same sealers used for slate, stone tiles, and wood. There are many sealers in the market with various recommended applications. Please apply sealer for the desired luster and penetration required prior to installation.


Know your adhesives; by understanding the specifics of the adhesive, a good deal of time and cost can be saved. All adhesive should be tested prior to any installation including consideration of moisture and temperature in the planned environment. If the application is outdoors, consideration to thermal expansion needs to be taken into account. Since Stüning™ Stone is a veneer it must expand and contract with the substrate or delamination may occur. Where adhesive primers are recommended, the brand should be tested by the installer before final installation.

We recommended the use of MAST Adhesives (inside or outside) that is formulated specially for Stüning™ Stone.

The back of Stüning™ Stone may require a filler type adhesive for some applications. For wet environments, epoxies, polyester resin, and water proof adhesive are the best candidates. Contact adhesives are not recommended due to the uneven backing of Stüning™ Stone. Do not use where the substrate is a moisture barrier when using non-catalyzing (water vapor type) cure adhesives. Adhesive may not adhere properly if applied between non-porous materials.

Hand Rollers

A hand roller is recommended to remove air between the Stüning™ Stone and substrate. To properly roll out trapped air, start in the middle of a sheet while firmly rolling to the edge. Do not press too hard while rolling as this may cause back-filled areas to push adhesive out and leave an air void. By proper pre-back-filling and using good rolling techniques, a solid, hard surface will be achieved.


For best results of adhesive to substrate, a 3/16” notched trowel is recommended. 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 Stüning™ Stone may require a filler type adhesive to backfill or level out voids of the natural stone. It is always best to back-fill or back-butter voids or depressions in the material before application to a substrate.

Tiling, Grouting & Joining

Stüning™ Stone can be used to create a tiled effect by leaving a grout joint between cut pieces. Sheets may also be butt-jointed for the look of a smaller seam. Due to the thin nature of Stüning™ Stone, a 1/8” to ¼” grout joint will produce better results. Tests show the use of water based epoxy and acrylic premixed grout work well to fill between the cut veneers. During the sponge-off process, the epoxy will seal the surface of the Stüning™ Stone as well. These grouts are also available in several colors to match the existing decor. If desired, a deeper grout joint can be achieved by removing material just under the grout joint area with a scrapper tool. Modified grout and caulking grout can also be used.


In some indoor and most outdoor applications, expansion and contraction must be equal to prevent delimitation. A flexible adhesive may be considered in this case. 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 and retained moisture should be less than 2.5%.

Composition & Variations

Stüning™ Stone is laminated to a fiberglass and polyester resin substrate. Since Stüning™ Stone is a natural stone veneer, color and texture variances are not defects within the material, but are inherent to it and part of the natural beauty of quarried materials. Stüning™ Stone cannot be guaranteed to match dye-lot to dye-lot, so it is recommended that orders take into account future maintenance or re-fit possibilities.

UV & Temperature

The stone surface of Stüning™ Stone, like most stone elements, acts as a UV inhibitor and will resist high sun conditions for years. When adhered to a substrate, Stüning™ Stone will handle thermal contraction and/or expansion of most standard construction materials. Stüning™ Stone will handle both high temperatures and freezing without cracking.


Precautions must be taken when working with Stüning™ Stone due to the fiberglass composition of the backing materials. ALWAYS use the proper gloves, goggles, and dust mask when working with Stüning™ Stone. Industry standards recommend a NIOSH/MSHA approved respirator for this type of material. When using a saw, ALWAYS be sure to take proper precaution to cover skin and eyes from fiberglass dust. When cutting Stüning™ Stone with saws, grinders, or sanders, ALWAYS properly 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 (Silicolis) if inhaled. Work in a well ventilated area. Please wear safety glasses and a dust mask.