HENRY 925 BES BUILDING ENVELOPE SYSTEMS® SEALANT
Henry 925 BES Sealant is a premium, one-part building envelope sealant designed for construction joints subject to dynamic movement. Formulated with advanced silyl-terminated polyether (STPE) technology, this high-performance sealant provides excellent weather resistance, long-term flexibility, and very low VOC emissions.
Henry 925 BES cures with ambient moisture to form a durable, elastic rubber-like seal that bonds to a wide range of construction materials. It is commonly used as a detailing component within Henry air barrier, waterproofing, flashing, and roofing systems.
FEATURES
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STPE polymer technology – provides excellent durability, adhesion, and weather resistance
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High movement capability – accommodates dynamic joint movement up to ±35%
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Remains elastic – flexible seal resists cracking, shrinking, or hardening over time
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Low VOC formula – low odor and compliant with strict VOC requirements
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Paintable after cure – can be finished to match surrounding materials
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Non-sag application – stays in place when applied to vertical joints and surfaces
APPLICATIONS
Henry 925 BES Sealant is primarily used as a detailing component within Henry building envelope systems. It is designed for sealing construction joints, penetrations, and transitions in commercial wall assemblies.
Common applications include:
- termination bars and flashing details
- wall penetrations and transitions
- construction joints subject to movement
- detailing air barrier and waterproofing systems
- sealing masonry, concrete, metal, and wood substrates
SPECIFICATIONS
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Product Number: HE925
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Container Size: 20 oz sausage (591 mL)
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Color: Black
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Joint Movement Capability: ±35%
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Maximum Joint Width: 1" (25 mm)
CERTIFICATIONS
- ASTM C719 +35% movement capability
- ASTM C920 Type S, Grade NS, Use NT, Class 35
- Federal Spec TT-S-00230C, Type II, Class A
SEALANT COVERAGE GUIDE
Estimated yield per 20 oz (591 mL) sausage
| Bead Size |
Coverage |
| 1/8" |
245 ft |
| 1/4" |
61 ft |
| 3/8" |
27 ft |
| 1/2" |
15 ft |
| 5/8" |
10 ft |
| 3/4" |
7 ft |
| 7/8" |
5 ft |
| 1" |
4 ft |
INSTALLATION
Henry 925 BES Sealant is applied using professional-grade sausage caulking guns. The sealant cures through exposure to ambient moisture, forming a durable elastic seal suitable for joints exposed to movement and weathering.
RESOURCES
