Air-Bloc® All Weather STPE

Air-Bloc® All Weather STPE is a silyl-terminated polyether (STPE) fluid-applied air and water-resistive barrier engineered to provide exceptional moisture control, vapor permeability, and weather protection for above-grade wall assemblies. This single-component, high-solids formulation cures with ambient moisture to form a seamless, durable, rubber-like membrane that can remain exposed to UV for up to 12 months before cladding installation.

Designed for flexibility in construction scheduling, Air-Bloc® All Weather STPE adheres to damp surfaces, resists rain wash-off within 30 minutes, and remains stable in extreme temperatures (-40°F to 300°F). Its low-VOC, NFPA 285-compliant formulation makes it an ideal solution for high-performance building envelopes.

Key Benefits of Air-Bloc® All Weather STPE:

• UV-resistant—can be exposed for up to 12 months during construction
• Rain-resistant within 30 minutes—ideal for fast-paced construction schedules
• Superior adhesion to multiple substrates—applies to damp concrete, CMU, gypsum, OSB, and metals
• Vapor-permeable—prevents moisture buildup while maintaining air tightness
• NFPA 285 compliance—meets fire safety requirements for various wall assemblies
• Flexible application—applies by brush, roller, or spray for fast, easy installation
• High-temperature stability—service range from -40°F to 300°F (-40°C to 149°C)
• Low VOC (<25 g/L)—environmentally compliant in all 50 states

Common Applications:

• High-performance air and water barrier for commercial and residential construction
• Building envelopes requiring vapor permeability and extreme weather resistance
• Wall assemblies behind open-joint rain screen cladding
• New construction and renovation projects requiring long-term exposure before cladding
• Air barrier system for LEED-certified and energy-efficient buildings

💡 Available in 5-gallon (18.9 L) pails and 55-gallon (208 L) drums.