Description:
MasterSeal NP 1 (formerly Sonolastic NP 1) is a single-component, high-performance elastomeric polyurethane sealant. It's easy to use straight from the tube, requiring no mixing, and usually does not need priming to adhere to various materials such as concrete and masonry. Ideal for acoustic sealing, it effectively reduces sound transmission within partition systems, achieving high STC values by sealing gaps around cut-outs and along partition edges.
Features and Benefits
Features and Benefits:
- Available in a wide variety of common substrates
- Wide temperature application range makes MasterSeal NP 1 suitable for all climates
- UL listed; Passes 4–hour, 4–inch, fire and hose stream test when used with Ultra Block or mineral wool
- Suitable for water immersion with documented performance in wet areas
- Meets VOC requirements in all 50 states
- One-component formula requires no mixing, helping to reduce labor costs
- Joint movement capability ±35% provides excellent flexibility for keeping moving joints weathertight
- Easy to gun and tool, speeding up application and making neater joints
- No primer required for most construction materials lowering installation costs
- Weather resistant for long-lasting weather tight seals
- Compatible with non-rigid coatings and can be painted
- Superior holding power for long-lasting roof tile installation
Technical Data
Technical Data:
| Property |
Results |
Test |
| Movement capability,% |
±35 |
ASTM C 719 |
| Tensile strength, psi(MPa) |
350(2.4) |
ASTM D 412 |
| Tear strength, pli |
50 |
ASTM D 1004 |
| Ultimate elongation at break,% |
800 |
ASTM D 412 |
Rheological at 120 °F (49 °C)
*(sag in vertical displacement) |
No Sag |
ASTM C 639 |
| Extrudability, 3 seconds |
Passes |
ASTM C 603 |
| Hardness, Shore A *At Standard Conditions *After Heat Aging (Max Shore A:50) |
25 - 30 25 |
ASTM C 661 |
| Weight loss, after heat aging, % |
3 |
ASTM C 792 |
| Cracking and chalking |
None |
ASTM C792 |
| Tack-free time, hrs, *Maximum 72 hrs |
Passes |
ASTM C 679 |
| Stain and color change |
Passes |
ASTM C 510 |
| Adhesion* in peel, pli (min. 5 pli) |
30 |
ASTM C 794 |
| Adhesion* in peel after UV radiation through glass (min. 5 pli) |
Passes |
ASTM C 794 |
| Artificial Weathering *Xenon Arc, 250 Hours |
Passes |
ASTM C 793 |
| Artifical Weathering *Xenon Arc, 3,000 Hours |
No Surface Cracking |
ASTM G 26 |
| Water Immersion, 122°F (50°C) |
Passes 10 Weeks without movement cycling |
ASTM C 1247 |
| Sound Transmission Class STC (dB) |
44 |
ASTM E 90 |
*Primed for water immersion dictated by ASTM C 920. Concrete and aluminum primed with P 173.
Test results are typical values obtained under laboratory conditions. Reasonable variations can be expected.
Recommended Applications
Recommended Applications:
- Interior and exterior
- Above and below grade
- Immersed in water
- Expansion joints
- Panel walls
- Precast units
- Window frames
- Roofing
- Fascia
- Parapets
- Vinyl siding
- Store front assemblies
Application Details:
Application Details:
- Service Temperature Range -40 to 180°F (°C) (-40 to 82)
- Shrinkage: None
- ASTM C 920, Type S, Grade NS, Class 35, Use NT, M, A, T, O* and I
- Federal Specification TT-S- 541, Type II, Class A
- Corps of Engineers CRD-C- 531, Type II, Class A
- Canadian Specification CAN/CGSB-19.13-M8, Classification MCG-2-25-A-N, No. 81026
- CFI Accepted
- Underwriters Laboratories Inc.® classified (Fire resistance only)
- ISO 11600-F-25LM
- STC (Sound Transmission Class)
Common Substrates
Common Substrates:
- Concrete
- Masonry
- Aluminum
- Wood
- Clay & concrete roof tiles
- Stucco
- Natural stone
