Description
Bonstone engineering-grade anchor epoxy is a two-part, slow cure exterior epoxy built for anchoring work that needs a long open time. The flowing paste stays workable long enough to set anchors and align stone components before it grabs, which matters on outdoor installs where higher jobsite temperatures would flash-cure a faster system before a crew finishes positioning the piece.
Where Bonstone Engineering-Grade Anchor Epoxy Is Used
Fabricators use this epoxy for anchoring stainless steel bolts in stone panels, stone to stone bonding, liner block applications, laminating stone to other construction materials, and assembling window units. Countertop and facade shops reach for it whenever a bond needs to hold up outdoors under weather and thermal cycling rather than sit indoors under controlled conditions. Facade crews in particular value the long working window when a large panel needs repositioning before the epoxy sets.
How Bonstone Engineering-Grade Anchor Epoxy Holds Up
Mix ratio is 1:1 by volume, with a 6 hour set time at 75 F that suits assemblies needing longer open times and higher outdoor temperatures. It can be thickened with Touchstone T-100 for vertical work or tinted with Touchstone Liquid Tints to match stone color. Apply only to horizontal surfaces during assembly, and expect a dry, oil-free, grease-free stone surface for a full bond.
The engineering-grade formulation is built to carry real structural load once cured, not just tack pieces together temporarily. That makes it suitable for anchor bolts that will carry ongoing wind or seismic load in a facade system, not only decorative stone-to-stone joints that see minimal stress after installation.
| Property | Detail |
|---|---|
| Mix ratio | 1:1 by volume |
| Set time | 6 hours at 75 F |
| Cure speed | Slow setting, engineering grade |
| Colors | Cream, buff, gray |
| Additives | Touchstone T-100 thickener, Touchstone Liquid Tints |
| Packaging | QT, GAL, and pail kits |
QT, GAL, and 5 gallon pail kits scale from a single anchor repair up to a full facade run. Browse related epoxy adhesives for indoor and faster-cure options, and visit Bonstone for the complete hardscape adhesive line.
Need Help?
Need help choosing a kit size for your anchoring job? Call (800) 220-1966 or email [email protected].
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