How to Prevent Epoxy Putty Sagging on Vertical Surfaces

Choose the Right Thixotropic Epoxy Putty

For vertical repairs or bonding, always select a thixotropic (non-slumping) epoxy putty. These formulas are specifically designed to stay in place rather than running or dripping, even on steep or overhead surfaces. For example, Magelstick Epoxy Mastic is created with this purpose in mind, helping stone masons and renovation professionals achieve precise results every time.

Application Tips for Best Results

• Do not exceed recommended thickness: Apply the putty in thin layers rather than one thick coat, as over-applying may encourage sagging before the material cures.
• Mix thoroughly: Ensure the correct mixing ratio (for example, 100 parts epoxy to 50 parts hardener for Magelstick) for reliable setting properties.
• Press firmly: Work the putty well into gaps or onto surfaces, shaping as required so it will hold firmly during the curing process.

When This Matters

Preventing sagging is essential when grouting, bonding, or filling gaps on vertical structures such as stone façades, tiled walls, or architectural features. Without proper technique and the right putty, repairs can suffer from movement, uneven fills, or require reworking.