MasterSeal NP 2 - Polyurethane Sealant
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MasterSeal NP 2 is a multi-component, highly flexible, high performance, non-sag, polyurethane sealant. It has been successfully tested for joint movement of ±50%. It is available in 40 colors using special MasterSeal 900 color packs.
MasterSeal NP 2 is the ideal material for high movement, vertical or horizontal expansion joints, to provide a durable, weathertight, elastomeric seal.
Typical applications include:
Interior and exterior
Above and below grade
Water retaining structures (with primer)
Horizontal and vertical expansion joints in
buildings and structures
Wide joints up to 75mm
Aluminum and wood window frames
Parapets and vinyl siding
Store front assemblies
Movement capability of ± 50% adds protection against unanticipated movement
Weather resistant for long-lasting weathertight seals
Easy to gun and tool to speed up application and make neater joints
No primer required for most construction materials, lowering installation costs
Wide temperature application range makes MasterSeal NP 2 suitable for all climates
UL listed; passes 4-hour, 4-inch, fire and hose stream test with Ultra Block or mineral wool
Suitable for water immersion with documented performance in wet areas
Chemical cure allows for faster turnaround time
Bulk packaging results in less waste
Long pot life provides extended working time at elevated temperatures
Resilient seal withstands pedestrian and vehicular traffic
Non-sag formulation allows use in very wide vertical joints
MasterSeal NP 2 is either a two component prepigmented system consisting of Part A, Part B. Alternatively, when the neutral grade unpigmented system is used, a third component, the MasterSeal 900 color pack is added. Mixing pigmented 2 component system: Transfer entire contents of Part B to Part A container using a spatula or margin trowel. With a slow-speed drill and a sealant mixing paddle, mix 2 - 3 minutes, and scrape down sides of pail with a spatula before mixing for a further 2minutes. Keep the paddle blade below the surface of the sealant to avoid whipping air into the sealant.
Mixing unpigmented 3 component system: As above, add Part B to Part A and mix for 2 – 3 minutes. Before adding pigment, scrape sides of container to ensure complete mixing of Parts A and B. Transfer the entire contents of one MasterSeal 900 pigment can into the mixed Part A and B. Use a spatula or knife to remove all the pigment from the container. Continue mixing with a slow-speed drill and slotted paddle until color is uniform.