Please refer to the instructions for a list of approved interior and exterior substrates. Although we cannot list every possible surface, as a general rule the substrate must be completely rigid so that it will not expand, contract, flex or bow over time due to environment or humidity. (Note: wood is not recommended as an exterior substrate.)
Yes, you can adhere AirStone directly to tile, brick, stone, or marble, but it’s important that these substrates are in good condition (not chipped, cracked, crumbling or loose) and clean/free of dust before you begin your AirStone project. If substrate is painted, the paint must be in good condition (peeling, chipping paint will need to be scraped/sanded and cleaned).
Yes, for AirStone INTERIOR Adhesive, it should be at least 60 degrees F inside the room for 24 hours prior and 48 hours following installation. It should not be used where temperatues will exceed 120 degrees F or fall below 32 degrees F. For AirStone EXTERIOR Adhesive, it should be at least 40 degrees F outside during installation, and for 24 hours following installation. It should not be used where temperatures will exceed 300 degrees F or fall below -75 F.
AirStone is non-flammable, non-combustible and safe to use around wood stoves and fireplaces. It has a Class A rating in accordance with ASTM E-84 standards. AirStone Interior Adhesive is rated up to a temperature of 120˚F, and AirStone Exterior Adhesive (which can be used indoors) is rated up to a temperature of 300˚F.
We do not recommend using AirStone on floors, ceilings, hearths, counter-tops, or any horizontal surface.
Technically, it’s fine if AirStone gets wet (of course! It’s approved for outdoor use!). HOWEVER, we probably would not recommend it for INSIDE a shower considering that you shouldn’t use harsh cleansers and stiff scrub brushes that are commonly used to clean shower areas. The constant build-up of soap residue and all the nooks and crannies on AirStone could make it difficult to keep it clean. Plus mold could build up behind the stone, which isn’t a problem when it’s outside.
AirStone flats are 2” or 4” in height, with lengths of 4”, 6”, 8”, 10” and 12”. For corners, the heights are 2” or 4”, and the length from the inside leg is 2” on the short end and either 4” or 6” on the long end. The depth of the stone averages about 1”. The stone molds are cast from real stone, so the depth can vary anywhere from 1/2” to 1-5/8”, even on the same piece.
When a corner is not 90˚, flat pieces may be mitered to form the proper angle. Simply mark the angle with a pencil and cut the ends accordingly, so that the two pieces butt up to form a corner.
AirStone is designed to replicate real stone. Since there is no such thing as a real stone inside corner, you install AirStone as a mason would install real stone. Simply end the stone at the end of the first wall and then begin installing the second wall (so that the end of the stone on the second wall overlaps/butts up against the face of the stone on the first wall). You may notice that’s the way it was done on the inside corner shown in the videos on this website.
You should use a masonry blade (no teeth). When using a dry power saw, wear an approved dust mask and be sure that the back of the stone is free of dust before adhering to the wall. If using a wet saw, be sure that the stone is dry before applying AirStone Adhesive.
The AirStone “flats” come eight square feet to a carton. The “natural edge” and “corner” pieces come six linear feet to a carton. Also, one tub of AirStone Interior Adhesive (one gallon) will cover 30 sq. ft., and one tube of AirStone Exterior Adhesive (28 oz.) will cover 10 sq. ft.
AirStone can be easily cleaned with warm water and a soft-bristled brush. Do not power-wash AirStone. Acid cleaners, bleach, paint remover or concrete cleaners should never be used on AirStone.
First, you should always try to clean AirStone Adhesive off the face of the stone BEFORE it dries. If it’s too late, try dampening the adhesive with a washcloth or mister (this will only work on AirStone INTERIOR Adhesive). Try to keep it very damp for at least 30 minutes or longer until it starts to loosen up. You should then be able to scrub the adhesive off using more water and a soft toothbrush.
We have had customers who have painted and stained AirStone and were very happy with the results. Feel free to experiment if you wish, but we cannot recommend one particular brand of stain or paint over another.
Yes, in fact we recommend this for areas where AirStone may be subject to food splatter or grease, such as a kitchen backsplash or an outdoor grill. Use a high-quality stone or concrete sealer. Follow the manufacturers directions carefully.
AirStone is currently available through hundreds of Lowe’s (U.S. only), and also on lowes.com. AirStone is currently not available directly from the manufacturer.
No, but you can use an ANSI AII8.4 polymer-modified thin-set mortar.
Cement board should only be used for exterior projects that are detached from the home, such as mailboxes, outdoor kitchens, etc. (see next question if adhering AirStone directly to the exterior of a home). Make sure your backer board is rated for exterior use, and is free of all factory dust.
As long as you are working with an existing, exposed outdoor structure (assuming it has been designed to meet applicable building codes), AirStone can be applied directly onto weatherproof substrates, such as brick, concrete, ceramic tile, stone, stucco or concrete block. Be sure to use AirStone Exterior Adhesive (or Loctite PL Premium Construction Adhesive) for any exterior project.
First, use a substrate that is rigid and will not bow, bend, expand or contract with changes in temperature or humidity (wood is NOT recommended as an exterior substrate). If it is not important that the area behind the substrate stays dry, then cement board would be a good choice. Keep in mind, though, that cement board will absorb moisture.