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BASF Sonolastic NP 1

edwardh1's picture

my hardware store says this "caulk" is the best stuff made, especially for roofing. Its polyurethane, and the spec says it stretches 25%.
Anyone use it on roof flashing?
The tube itself says very little about the product- the on line spec sheets say its great everywhere cept underwater.

(post #127427, reply #1 of 8)

I've used it in a number of places. It's wicked good stuff. Cleanup isn't any fun, but it guns as smoothly as latex caulk. I believe it is primarily designed for expansion joints in concrete. It would be fine for roof flashing.

(post #127427, reply #4 of 8)

  We  use SL 1 for expansion joints in controlled atmosphere cold storage. Its self leveling,  wont do verticle stuff. There is also a primer that is used on the concrete first.

(post #127427, reply #2 of 8)

I've used it before. Bought it at a masonry supply house. performs as well as any of the better polyurethanes.

(post #127427, reply #3 of 8)

NP1 is great stuff.  High quality.  Don't get it on you or your clothes.


Just remembered a story about using it to do somehting, memory's not quite that good.  Anyone, went back the next day, a gecko had touched it with two feet when it was wet, then the ants came along and picked him clean.  Morbid but fascinating.



"Put your creed in your deed."   Emerson


"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it."  T. Roosevelt


Edited 4/11/2009 7:58 pm ET by FastEddie

"Put your creed in your deed."   Emerson

"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it."  T. Roosevelt

(post #127427, reply #5 of 8)

NP 1 is a very good urethane sealant.  I personally haven't noticed a big difference between it and Sikaflex or other high end urethanes in the final analysis,  but I know a few folks who absolutely insist on it, and it makes them sleep better at night to use it.


I believe it has a different solvent (xylene?) than a lot of other urethanes.  That's good to know for clean up and some compatability issues.


k

(post #127427, reply #6 of 8)

I've used only when it won't be seen, tooled or ever have to be repaired/replaced. Such as a conduit passing through a foundation.  I have a love hate relationship with most urethane caulks.

 

(post #127427, reply #7 of 8)

great stuff use it for everything.  We use it for around doors bonding to concrete.  And tooling is easy with a little soap and water and a rag

(post #127427, reply #8 of 8)

I use  soapy water and a foam brush. Trim them to fit whatever contour you want. Throw them away when they start to load up and you can't shake the excess off.