Dynagrip mirror, marble, granite is a premium-grade hybrid adhesive specifically formulated for mirror and countertop installation. This premium hybrid adhesive provides a permanent vertical hold in 1 hr ideal for mirror installation. This vow compliant adhesive is easy to gun and will not stain or damage mirrors, countertops or finished surfaces. It is a high-strength adhesive that delivers exceptional adhesion on porous/non-porous construction materials.