Choose for both surfaces
Compare the product's listed substrates and application guidance. Confirm any restrictions for coatings, porous stone and the conditions the finished joint will face.
Use the product-specific instructions
For a two-part epoxy, follow the prescribed ratio and mixing instructions. Set time and full cure are different: check both before you begin.
Plan support and cure
Prepare the joint and any support before mixing. Keep the assembly supported for the time specified by the product guidance.