SA-421 Natural Stone Adhesive


SA-421 is a specially formulated, polymer-modified, pre-blended dry powder material to be used as an adhesive for natural stone.


Ensure substrate and stone are both clean, dry and free of any bond-inhibiting debris. Using an electric mixer with a clean paddle, follow mixing instructions exactly as they appear on the bag. Apply SA-421 directly onto the rear of the natural stone as well as on the substrate. Immediately adhere the stone into place, avoid any impact or vibrations to the piece when applying, as this may weaken the bond. Let cure 24 hours.


50 lb. (22.6 kg) bag

Shelf Life

12 months if properly stored.


Store in a cool, dry area above ground. Avoid direct sunlight and high temperatures surpassing 100°F (38°C)


3/8" Thickness: 14-16 ft²/bag

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