The health and well-being of our valued customers, associates and communities are always a top priority at Sutherlands. As we navigate the coronavirus (COVID-19) developments, we wanted to send a personal note to let you know how we are responding.

  • Our stores have increased cleaning and sanitizing procedures; and our employees continue to use proper hand washing techniques.
  • We have restricted all non-essential business travel.
  • We recognize this is an evolving situation and are aware that certain states and local governments are enacting their own restrictions that could further impact our operations.
  • As an “Essential Business”, our stores remain open. However, we have reduced store hours – please visit for your local store’s hours. As always, you may continue to shop online at and pick up your purchase at your local store.
  • To decrease crowd sizes and create a safe and enjoyable shopping environment for our customers and employees, we are reviewing our upcoming promotions and events and ask that all customers and employees comply with social distancing requirements.
  • Rest assured we continue to work with our vendors to bring you quality products at Sutherlands low prices. Sutherlands is working closely with our vendors to re-stock our inventory of products in high demand such as face masks, hand sanitizer and cleaning supplies.

We appreciate your continued support of our family business during these challenging times.

The Sutherland Family

MasterSeal Masterseal Np-1 Polyurethane Sealant 10.1 Oz Aluminum Gray

  • Some stock photographs may show options that are not included. Please check product description.

Masterseal Np-1 Polyurethane Sealant 10.1 Oz Aluminum Gray


Please select a store to view pricing and availability.

* Estimated stock levels as of Sun, Apr 5, 2020. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availablity of items marked as Limited Stock.


MasterSeal NP 1 is a one-component, high performance, non-priming, gun-grade, elastomeric polyurethane sealant. It requires no mixing and typically requires no priming to bond to many materials, including concrete and masonry.


Application 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
Base Type Polyurethane
Color Aluminum Gray
Curing time (hours) 7 days
Size 10.1 oz
Standards ASTM C 920, Type S, Grade NS, Class 35, Use NT, M, A, T, O* and I; Federal Specification TT-S- 00230C, Type II, Class A; Corps of Engineers CRD-C- 541, Type II, Class A; Canadian Specification CAN/CGSB-19.13-M87, Classification MCG-2-25-A-N, No. 81026; CFI accepted; USDA compliant for use in meat and poultry areas; Underwriters Laboratories Inc. classified (fire resistance only); ISO 11600-F-25LM
Temperature Range -40°F to 180°F
Tensile Strength 350 psi
Type Multipurpose Sealant
V O C Content 35g/L less water and exempt solvents

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