W. R. MEADOWS BEM One-Component Building Envelope Membrane
BEM is a cold-applied, non-slump STPE membrane from W. R. MEADOWS for fillets, corner reinforcement, and termination detailing within building envelope systems. The moisture-curing, one-component formula trowels on at a minimum of 15 mils and cures to a tough, flexible elastomeric membrane without shrinking. Coverage is 6.27 sq. ft. per 20 oz. sausage at 40 mils wet.
BEM bonds to primed or unprimed concrete and asphalt and is solvent-free for use on ICFs and foam insulation. It is compatible with glass-mat exterior sheathing and AIR-SHIELD products for sheathing joint detailing. It can be applied at 30°F and rising, does not freeze, and skins over in 50 minutes ± 15 minutes at 75°F and 50% RH. VOC content is under 42 g/L, compliant with U.S. VOC regulations including EPA, CARB, SCAQMD, and OTC Phase I and II. Not intended for exposed or wearing surfaces, liners in water-containing structures, or surfaces to be painted.
Features
- Fillet and corner detailing: Forms fillets and reinforces corners, terminations, drains, and protrusions.
- Primerless adhesion: Bonds to concrete and asphalt, primed or unprimed.
- ICF and foam compatible: Contains no solvents that could attack insulated concrete forms or foam insulation.
- Non-slump consistency: Holds its shape as applied.
- 50-minute skin time: Skins over in 50 minutes ± 15 minutes at 75°F and 50% RH.
- Low-temperature application: Applies at 30°F and rising and does not freeze.
- Zero shrinkage: Solvent-free formula will not shrink as it cures.
- Broad VOC compliance: Under 42 g/L and compliant with U.S. VOC regulations.
W. R. MEADOWS BEM One-Component Building Envelope Membrane Specifications
| Specification | Details |
|---|---|
| Brand | W. R. MEADOWS |
| Model | BEM |
| Product type | One-component building envelope membrane |
| Packaging | 20 oz. (600 mL) sausages, 12 per carton |
| Chemistry | Silyl-terminated polyether (STPE) |
| Cure type | Moisture-curing |
| Consistency | Non-slump |
| Coverage | 6.27 sq. ft. (0.58 m²) per sausage at 40 mils wet |
| Minimum application thickness | 15 mils |
| Application temperature | Above 30°F (-1.1°C) and rising |
| Drying time | 50 minutes ± 15 minutes at 75°F (23.9°C) and 50% RH |
| Compatible substrates | Primed or unprimed concrete and asphalt, insulated concrete forms, glass-mat exterior sheathing |
| VOC content | Less than 42 g/L |
| VOC compliance | National EPA VOC Emission Standard for Architectural Coatings, CARB, SCAQMD, Maricopa County, Colorado AIM, Utah Department of Air Quality, LADCO, OTC Phase I and II |
| Cleanup | Tools cleaned with alcohol; cured material removed mechanically |
| Shelf life | 1 year from date of manufacture when stored indoors, unopened, at 40°F to 70°F (4°C to 21°C) |
| MasterFormat | 07 14 00, 07 14 16 |
| Includes | 12 sausages per carton |
