TinnerFlow™1st YearSealing & InsulationYELLOW · Check First
Water-based mastic cannot freeze or it will ruin the compound structure. Keep the mastic buckets stored in a warm job trailer or hot box until right before application. Do not apply it to metal surfaces dropping below 40^\circ\text{F} (4^\circ\text{C}) unless specified by the manufacturer.
Water-based mastic cannot freeze or it will ruin the compound structure. Keep the mastic buckets stored in a warm job trailer or hot box until right before application. Do not apply it to metal surfaces dropping below 40^\circ\text{F} (4^\circ\text{C}) unless specified by the manufacturer.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.