Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Features
- Low odor, low VOC
- Moisture cure using STPE base polymer
- Paintable with latex based paint, upon curing
Applications & Uses
- Markets
- Applications
- Cure Method
- Usage
Designed for multiple construction uses, Henry® 925 BES Sealant can be used as a building envelope sealant for self-adhered air barriers, as well as an external joint sealant for Henry air barrier, waterproofing, and roofing systems. Henry® 925 BES Sealant is an alternative to silicone and moisture cure urethanes, in above-grade construction applications, and is optimal for construction joints up to 1” (25mm) width that are subject to dynamic joint movement of + 35%.
- Application
Surface Prep: Joints must be sound, smooth, uniform and free from defects and foreign materials. Joints must also be clean, dry, free of frost and all contaminants, such as curing compounds, sealers, or coatings. Sealant adhesion should be tested on each different substrate prior to use by applying a bead allowing to cure thoroughly. To test adhesive strength, pull one end of the bead.
Apply: Cut nozzle to desired bead size; puncture inner seal. Apply at a 45° angle while pushing sealant ahead of nozzle. The width of the joint should be a minimum of 4 times the anticipated movement. In joints up to ½ ” (13 mm) wide, the depth of the sealant should be equal to the width, but not less than ¼” (6 mm). In joints wider than ½” (13 mm), the depth should be maintained at ½” (13 mm). Maximum joint width for installation is 1” (25 mm). In vertical and horizontal joints, tooling is necessary to aid contact with the substrate and eliminate air bubbles.
- Cleanup
Clean hands and equipment with biodegradable terpene solvent such as citrus-based hand cleaner.
Properties
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Application Temperature | -12 to 43 | °C | - |
| Density | 13.0 | lbs/gal | - |
| Drying Time (Initial Set, 50% R.H. 20°C ) | 60 - 90 | Minutes | - |
| Drying Time (Set Through, 50% R.H. 20°C ) | 24.0 | Hours | - |
| Durometer Hardness | 20 - 30 | Shore A | ASTM D2240 |
| Elongation | max. 450 - 550 | % | ASTM D412 |
| Modulus | 40 - 50 | %psi | - |
| Service Temperature (cured) | -40 to 82 | °C | - |
| Tensile Strength | 150 - 200 | psi | ASTM D412 |
| VOC Content | max. 5 | g/l | EPA Method 24 |
Regulatory & Compliance
- Approvals and Certifications
- Meets ASTM C719 + 35%
- Meets Fed Spec TT-S-00230C, Type II, Class A
- Meets ASTM C920 Type S, Grade NS, Class 35
- Granted SWR Institute Certificate of Validation
Packaging & Availability
- Packaging Type
- Product Size / Packaging
10.3 oz cartridge
20 oz sausage
2 gallon bucket
Storage & Handling
- Storage
Henry® 925 BES Sealant has a shelf life of 12 months from date of manufacture when stored in original unopened container at or below 80 °F (27 °C). Containers should always be kept sealed when not in use.