Model # 181250

Internet #100678633

Sonneborn NP1 10.1 oz. Gun-Grade Polyurethane Sealants (4-Pack) Limestone

Discontinued Sonneborn

NP1 10.1 oz. Gun-Grade Polyurethane Sealants (4-Pack) Limestone

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Frequently Bought Together

Product Overview

Suitable for use on concrete and masonry, the Sonneborn NP1 10.1 oz. Gun-Grade Polyurethane Sealants (4-Pack) feature a high-performance formula that can be applied in most climates.

  • 1-component, solvent-based elastomeric polyurethane formula does not require mixing
  • Adheres to most materials with no primer required
  • Paintable and stainable
  • Mold and mildew resistant
  • Provides great flexibility to help keep moving joints tight
  • Easy to apply using a gun or a tool
  • ASTM C719 tested
  • UL listed
  • Subject to or will include a recycling fee in the following states: CA, OR

Info & Guides

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Caulk Features
Dry to touch (min.)
Paint Product Type
Professional Paint Supplies & Values
Pro Supplies

Warranty / Certifications

Manufacturer Warranty

More Products With These Features


Customer Questions & Answers

Can I get this product sooner than Oct 29th?

Asked by: Mark
Thank you for your recent inquiry with The Home Depot, Mark. Express shipping is not available on these sealants. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2015-11-06
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Customer Reviews

NP1 10.1 oz. Gun-Grade Polyurethane Sealants (4-Pack) Limestone is rated 3.7 out of 5 by 7.
Rated 4 out of 5 by from Worked for me I bought this after seeing it on a website for gluing down soundproofing underlayment. To get it out you not only have to cut the tip like normal caulking but also stick something down through the hole to break a metallic seal. I used a screwdriver and then it worked fine. I think the people writing reviews saying they could not get it out may have missed this step. I gave it a 4 though because it took a pretty long time to dry.
Date published: 2014-03-11
Rated 5 out of 5 by from The best you can buy As a professional maintenance person in the business for over 35 years, NP1 cannot be beat for it durability and adhesive qualities. I use it for just about anything that needs a semi-permanent application.
Date published: 2012-07-01
Rated 4 out of 5 by from good product Product was easy to apply and provided a great seal. I would use again as needed.
Date published: 2012-07-18
Rated 1 out of 5 by from 3 of 8 tubes no good 3 tubes had cured on nozzle end,likely because of the lousy packaging.the tubes were flying around a too large box.will not order from hd again.
Date published: 2012-10-17
Rated 2 out of 5 by from OK - but could have done better I bought gun grade polyurethane sealant. It was so difficult to get out of a caulking gun, several tubes 'backfired' and had sealant material pushing past the endcap inside the tube. This made for some messy cleanup and I lost about 20% of the material. I think it was old material which had partially cured inside the tube.
Date published: 2013-08-21
Rated 5 out of 5 by from Have not used yet, but was told by a professional to use for large concrete gaps. The product was recommended to me by a professional that works in the concrete field. I have not had a chance to apply the product yet as it turned colder than allowable for the product application.
Date published: 2014-12-10
Rated 5 out of 5 by from great product great product but guess i have to drive 2 hr. to buy it somewhere else
Date published: 2012-08-22
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