Select Neutral Cure 100% RTV Silicone Sealant (Detached Nozzle)

19 reviews Write a Review
Price $7.49


Select Neutral Cure 100% RTV Silicone Sealant (Detached Nozzle)

Some construction and DIY projects - like those that involve adhering materials to surfaces like vinyl windows, doors, and more - require a silicone sealant that is just a little stronger than what’s on most shelves. If you’re looking for the perfect silicone sealant for specialized jobs, look no further than Project 1 Neutral Cure Silicone Sealant. 


This high-quality, professional-grade sealant can be used to adhere to concrete, limestone, brick, mortar, and more surfaces where other products just don’t work. Project 1 Neutral Cure Silicone Sealant adheres  to concrete, limestone, and other surfaces thanks to its strong adhesion. It’s also resistant to both low and high temperatures and UV rays, making it ideal for outdoor use. 


Because it is a neutral curing silicone sealant, Project 1 Neutral Cure Silicone Sealant isn't just effective and easy to apply, but it also has a minimal odor, meaning that the smell won’t be overpowering when this sealant is applied. It’s perfect for indoor use and outdoor use alike and makes for a simple and pleasant application process that differs from many other non-neutral curing silicone sealants out there on the market. Neutral curing silicone sealants like the Project 1 Pro Grade RTV Silicone Sealant are speciality products that can only be purchased from silicone sealant specialists like our team at Silicone Depot. 


Also note that Project 1 Pro Grade RTV Silicone Sealant is your only choice if you’re looking to work on vinyl surfaces, since other types of silicone won’t properly adhere to vinyl windows, doors, and siding. This sealant will form a long-lasting seal on all of these types of surfaces and will not wear down over time, while other types of silicone won’t even adhere. 


If you’re looking for a 100% silicone sealant for use on masonry surfaces that won’t wear them down or corrode them but also won’t wear away in the long term, Silicone Depot’s Project 1 Neutral Cure Silicone Sealant is a great choice. You can use it on any surface from vinyl to concrete, limestone, brick, and mortar. 


  • Sticks to masonry surfaces including concrete, limestone, brick, mortar, and more
  • Also adheres to other surfaces such as gel-coated, sheet metal, and more
  • Strong adhesion for long-lasting applications
  • Resistant to high temperatures and UV rays
  • Can be used for both indoor and outdoor applications
  • Low to no odor 
  • Neutral curing 
  • Same-day rain and weather-ready


  Project 1 Silicone is supplied in a 10.1oz (300ml) caulking cartridge, 5 gallon pails, 
  and 55 gallon drums. Every caulking cartridge comes with one detachable nozzle.

  Warranty and Shelf Life:

  Each application should be pre-tested for suitability of this product for the 
  intended use. When stored in the original, unopened container at temperatures 
  less than 90 degrees F (32 degrees C), our Silicones are guaranteed for one year 
  from date of purchase.


  Important note: Paint will not adhere to silicone sealant but silicone sealant will 
  adhere to most painted surfaces. Always paint first and then seal. Make sure the 
  paint has had time to dry completely before applying silicone sealant.

  Safety Data Sheet

Extra Information


19 Reviews

  • Posted by Mark Desmond on Jun 11th 2022


    A caulk we have used for years

    Past supplier has been non responsive

  • Posted by Robert Bergsmotto on Oct 19th 2021


    Aluminum silicone

    Product was fine but color was a bit to light and the texture was much to shiny, almost like aluminum foil. Not suited for my purposes. If it were paintable I would probably have kept it. Please send return address barcode.

  • Posted by Lou Tapia on Sep 29th 2021


    white & clear neutral cure silicone

    very good product and the service is also great

  • Posted by L on Jul 16th 2021


    Neutral Cure RTV Silicone

    Great product; adheres well, low odor; received very quickly; great price & free shipping on larger orders . Very Happy with purchases so far.

  • Posted by David on Jun 8th 2021


    Great for sealing Truscore Panels

    I ordered a box of this silicone and have been very happy with it. The screw in nozzle has been perfect and I can transfer a nozzle from one tube to another to use every last bit of caulk and maintain a consistent bead size. I used these with a powered caulk gun to seal Truscore PVC wall and ceiling panels and it all worked great. Next step is to order another case and seal all my windows.

  • Posted by James R Elkins on Oct 19th 2020


    Good Product

    Good Product and Price is perfect

  • Posted by Ruben on Jul 16th 2020


    I recommend this product

    I installed windows and I been using this. It bonds very well to glass, metals and vinyl

  • Posted by Unknown on Aug 13th 2019


    Easy to work with

    Good working time compared to other brands. Dispenses well.

  • Posted by Michel Jones on Oct 22nd 2018


    Plastic To Metal STUCK

    This silicone adhesive was required for the job I'm doing as natural stone can discolor using a standard silicone. This silicone is called a neutral cure silicone, there is no vinegar smell it only has a slight rubbing alcohol smell, and won't harm stone. It's adhesive qualities are FANTASTIC !