W.R. Meadows AIR-SHIELD™ LSR
Short Description
AIR-SHIELD™ LSR is a single-component, synthetic rubber-based liquid air, vapor, and moisture barrier designed to protect building envelopes from air leakage and water intrusion. This seamless, highly flexible membrane adheres to concrete, CMU, gypsum board, plywood, metal, and more, forming a durable, crack-bridging air barrier. Sprayable, easy to apply, and VOC-compliant, AIR-SHIELD™ LSR is ideal for commercial and residential construction projects.
AIR-SHIELD™ LSR is a high-performance, liquid-applied air, vapor, and moisture barrier engineered for superior weatherproofing and energy efficiency in commercial and residential buildings. This asphalt-free, single-component synthetic rubber formulation cures to form a tough, elastomeric membrane that effectively seals building envelopes, preventing air leakage and moisture infiltration.
Designed for above-grade wall assemblies, AIR-SHIELD™ LSR is compatible with a variety of substrates, including precast and cast-in-place concrete, CMU, gypsum sheathing, Styrofoam, aluminum, steel, and plywood. Its sprayable formulation simplifies installation, while its seamless, monolithic membrane bridges cracks and gaps, ensuring long-lasting performance.
This fire-resistant air barrier meets stringent ASTM and ABAA performance standards and is available in low-VOC and extra-low VOC versions to meet environmental regulations.
Key Benefits of AIR-SHIELD™ LSR:
- Prevents air and water intrusion—enhances building energy efficiency
- Seamless and highly flexible—bridges cracks and surface irregularities
- Non-asphaltic—designed to meet fire code requirements
- Sprayable and roller-applied—allows for fast, efficient installation
- Self-sealing around fasteners—ensures continuous moisture protection
- UV-resistant for up to four months—provides installation flexibility
- Low permeability—inhibits vapor transmission through porous materials
- VOC-compliant—meets EPA, CARB, and regional air quality regulations
- Water-based, non-toxic formulation—safe for workers and environmentally friendly
Common Applications:
- Air and moisture barrier for commercial and residential exterior walls
- Vapor barrier for cavity walls, parapets, and firewalls
- Air leakage prevention in high-performance building envelopes
- Sealing sheathing joints and rough openings in exterior walls
- Enhancing energy efficiency in new construction and renovation projects
💡 Packaging: Available in 5-gallon pails and 55-gallon drums.
💡 Coverage: 17-22 sq. ft. per gallon at 75 mils wet film thickness (40 mils cured film thickness).
