Knowde Enhanced TDS
Features & Benefits
- PRODUCT SELECTION GUIDE
ENVELO-SEAL™ 2.7 CL1 S includes two 2.7 density systems designed for processing on substrates of 45° - 140°F (7° - 60°C). The following should act as a selection guideline.
- ENVELO-SEAL™ 2.7 CL1 “S” - 95° - 145°F (35° - 63°C)
- ENVELO-SEAL™ 2.7 CL1 “W” - 45° - 75°F (7° - 24°C)
For single pass applications the recommended temperature range applies to the substrate temperature; for multiple pass applications the temperature applies to the ambient
temperature. Substrate composition will influence product selection.
Applications & Uses
- RECOMMENDED USES
- Roofing systems.
- Commercial construction.
- Industrial construction.
- ENVIRONMENTAL CONSIDERATIONS
Applicators must recognize and anticipate climatic conditions prior to application to ensure highest quality foam and to maximize yield. Ambient air, substrate temperatures, moisture, and wind velocity are all critical determinants of foam quality and selection of the appropriate reactivity formulation. Variations in ambient air and substrate temperatures will influence the chemical reaction of the two components, directly affecting the expansion rate, amountof rise, yield, adhesion, and the resultant physical propertiesof the foam insulation.
To obtain optimal results the ENVELO-SEAL™ 2.7 CLI S should be spray-applied to substrates when ambient air and surface temperatures fall within the range of 50° - 120°F. All substrates to be sprayed must be dry at time of application. Moisture in the form of rain, fog, frost, dew, or highhumidity (>85%R.H.), will react chemically with the mixedcomponents, adversely affecting the polyurethane foam formation, dimensional stability and physical properties ofthe finished product. Wind velocities in excess of 12 milesper hour may result in loss of exotherm and interfere withthe mixing efficiency, affecting foam surface, cure, and physical properties, and will cause overspray. Precautions must be taken to prevent damage to adjacent areas fromover spray.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| R-Value (aged, at 1 inch) | 6.64 | — | ASTM C518 |
| Compressive Strength | 44 | psi | ASTM D1621 |
| Core Density (nominal) | 2.7 | lbs/ft3 | ASTM D1622 |
| Closed Cell Content | min. 90 | % | ASTM D2856 |
| Tensile Strength | 60 | psi | ASTM D1623 |
| Water Vapor Transmission (perms at 1 inch) | 1.56 | — | ASTM E96 B |
| Dimensional Stability (7 days at 158°F, ambient, 7 days at 158°F, 97% RH, 7 days at -22°F, ambient) | min. 4 (min. 4) (min. 4) | % | ASTM D2126 |
| Water Absorption (96 hour immersion) | 0.08 | — | ASTM D2842 |
| Shear Strength | 40 | lbs/in2 | ASTM C273 |
| Processing Designation | Surface Temperature | — | — |
| Winter | 45 - 70 | °F | — |
| Regular | 65 - 110 | °F | — |
| Summer | 95 - 140°F | — | — |
Technical Details & Test Data
- SURFACE BURNING CHARACTERISTICS
ASTM E84 Class I Flame Spread <25 Smoke Development <450 Note: The flame spread rating is not intended to reflect hazards presented by this or any other material under actual fire conditions.
ENVELO-SEAL™ 2.7 CLI S foam-forming system is availablein a Class 1 formulation, as set forth under Underwriters Laboratories UL 723 (ASTM E84), and possesses the flammability characteristics shown below.
ENVELO-SEAL™ 2.7 CLI S is an approved roofing material and has completed the Under writers Laboratories testingfor UL-790 approval and is listed as a Class A Roofing System under U.L. File #7622.
ENVELO-SEAL™ 2.7 CLI S includes three 2.7 pcf density systems designed for processing on substrates 45 – to 140°F.For single pass applications the recommended temperature range applies to the substrate temperature; for multiplepass applications the temperature recommendations applyto the ambient temperature. Substrate composition will influence product selection. Consult your SPI representativeto determine which product best satisfies you applicationrequirements.
- PROCESSING EQUIPMENT
Store materials between 60° to 80°F in a dry and well ventilated area. Keep material from freezing. Material in containers should be maintained at 65° to 75°F while in use. Heated trailers, hot boxes, or heated tank storage may be necessary. Material temperature should be confirmed witha thermometer or an infrared gun.
2:1 transfer pumps are recommended for material transferfrom container to proportioner. The plural-componentproportioner must be capable of supplying each component within ± 2% of the desired 1:1 mixing ration by volume. Hose heaters should be set to deliver 120° to 130°F material to thespray gun. These settings will ensure thorough mixing inthe spray gun mix chamber in typical applications. Optimum hose pressure and temperature will vary with equipmenttype and condition, ambient and substrate conditions, andthe specific application. Some equipment may require you to warm containers to achieve optimum material temperature.It is the responsibility of the applicator to properly interpret equipment technical literature, particularly information that relates to acceptable combinations of gun chambersize, proportioner output, and material pressures. The relationship between proper chamber size and capacity ofthe proportioner’s pre-heater is critical.
CAUTION: Extreme care must be taken when removing and reinstalling drum transfer pumps so as NOT to reverse the“A” and “B” components.
- PER PASS LIMITATIONS
For optimal physical properties, foam made with ENVELOSEAL™ 2.7 CLI S system pass thickness should be limited to 2” per pass. If subsequent passes are needed, applicators should wait 10 minutes between passes to allow reaction heat to dissipate. The exotherm reaction can cause temporary substrate themal rise in excess of 150°F, whichmay result in substrate thermal expansion. If the substrate then contracts when the reaction heat dissipates, substrate deformation can occur.
- PROCESSING PARAMETERS
PRE-HEATER TEMPERATURE “A” and “B” 120 - 130°F HOSE TEMPERATURE “A” and “B” 120 - 130°F PRESSURES 1000 - 1200 psi dynamic MIX RATIO PARTS 1 to 1 by volume “A” to “B” Viscosity at 70°F 500 - 650 cps “B” Component
150 - 250 cps “A” Component
Safety & Health
- EMERGENCY FIRST AID PROCEDURES
EYES: Causes eye irritation. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF eye irritation persists: Get medical advice/attention.
SKIN: Causes skin irritation and may cause allergic skin reaction/sensitization. IF ON SKIN: wash with plenty of soap and water. If skin irritation or rash occurs: Get medical advice/attention. Wash contaminated clothing before use.
INHALATION: May be harmful IF INHALED. IF INHALED:Remove victim to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER or doctor/physician if you feel unwell.
INGESTION: May be harmful if swallowed. IF SWALLOWED: Rinse mouth. Call a POISON CENTER or doctor/physician IF you feel unwell.
FIRE HAZARD: Fires involving either of these components may be extinguished with carbon dioxide, dry chemical, or inert gas. Application of large quantities of water sprayis recommended for spill fires. Personnel fighting the firemust be equipped with NIOSH approved self-contained breathing apparatus.
Storage & Handling
- Shelf Life
- “A” side 1 year “B” side 6 months