Asked on Jun 28, 2015

NP-1 sealant curing issue

by Rockbiter
When using this sticky caulk on my basement expansion joint fixing project the bottle listed no useful application tips. Like clean up solution or cure time. I looked up briefly on the internet for peoples response as to a cleaning, or as I am also familiar in the caulking world the clean up solution if used can also help spread the said product smoothly. I read alcohol from someone's random post. more than 24 hours in and it is still sticky (not a backer rod needed depth) also the downloaded pdf file about the product itself says to NOT USE ALCOHOL based solvents.. How (pardon english) F'd am I? or is this ok and just a patience issue? If I am screwed how do I even begin to remove this stuff for try 2?
  5 answers
  • Hope Williams Hope Williams on Jun 29, 2015
    Use a scraper, wet paper towels and sand paper. Scrape your caulk. Wipe excess off an paper towels. When you can't get anymore off scraper, sand scraper clean. Use clean scraper for each pass for smoothest result. However, you really need to just bite the bullet and hire the professionals!
    • Rockbiter Rockbiter on Jun 29, 2015
      I'm great with caulking in most cases, the professionals tend to not meet my standards. This was just a uniquely different caulk. All others you use the clean up solvent for smoothing. You didn't answer my question. I am glad you know an application method but I already applied it so your tip is either too late or skips steps in a set that would bring me back to the start, I cannot perform this action by bring given the ending or the impossible time travel backward to two days ago. Darn arrow theory claims a win again! Sorry phone reply post so grammer gets messed up in spots
  • Workerbee Workerbee on Jun 29, 2015
    I am assuming that it is a silicone base rather than a latex base. If that is correct then acetone can be used to clean up your tools. As for curing time i would think for an expansion joint you are looking at two weeks or so for a good cure. This stuff is a B to work with so try to apply if so you don't need to touch it or use something disposable like a cut up milk jug. Good luck
    • Rockbiter Rockbiter on Jun 29, 2015
      @Workerbee thank you for telling me that it is a b to work with. The milk jug idea is great! I don't have tools to sacrifice to this stuff! Alcohol will stop the curing process completely apparently and that is what I skillfully pulled off. This is why I created a hometalk account, helpful knowing that is better than just the reviews on a sight about people who bought it. I will choose a different caulk though because if I learned anything from using "Great Stuff" is I hate being that messy with stuff that is impossible to clean off and have it look good at the end.
  • Rockbiter Rockbiter on Jun 29, 2015
    I have to apologize to the one lady who posted the pdf, Sorry I was working off of no sleep and a headache. I did need to simply look at the pdf myself for the answer as to whether or not I fudged it up bad. I called customer service, in hopes that what I read was wrong because the if I did the exact thing you WEREN'T suppose to use for cleaner then it would mean a cruddy reverse job ahead. I did use the one solvent you aren't suppose to, and was told alcohol stops the curing process completely and I had to remove it all and start over..2 hours of rewind and I am close to begining anew
  • J.stedman J.stedman on Jun 24, 2018

    Mineral spirits will do the trick for you.

    I was a commercial urethane foam roofer for a Time and we used np1 every day and that's what we used to clean tools and smooth the product with. You can simply dip your fingerin water sms keep your finger wet to prevent it from sticking to skin and use your finger to smooth it If you don't want to stick your finger into mineral spirit's.

  • Héctor Héctor on Feb 15, 2020

    Np1 takes a week to cure, use xylene to clean tools and to dip your thrower to tool it.