How to Apply CertaSeal INT Sealant CertaSeal INT™ Sealant CertaSeal INT™ from CertainTeed is a spray-applied, water-based acrylic latex sealant that is quick and easy to install and requires minimal personal protection equipment. Play Close Related Content Residential Roofing Building Insulation Increase Energy Efficiency During Heating Season Fiber Glass Insulation Is an Easy Way to Improve Thermal Performance As a northern country with notoriously long, cold winters, Canada has very high Learn More Building Insulation Increase Energy Efficiency During Heating Season Building Insulation Fiberglass Batt Insulation Contributes to Highest LEED® Certification Building Insulation Safeguarding the Health of Building Occupants Building Insulation Fiberglass Insulation and Vapor Barriers Residential Roofing Siding Building Insulation Drywall Ceiling & Wall Systems Mitigating Risk with Precision: How ONE PRECISION ASSEMBLIES™ Elevates Construction