Rated 3.8 out of 5 by 10
Rated 5.0 out of 5.0 by Techbob Fantastic
This sticks to anything, including damp
It absorbs moisture as it cures
It remains flexible and super tough
I recommend indoors and out
September 6, 2016
Rated 4.0 out of 5.0 by Larry First time user review
Well... I'm not an expert on sealants or adhesives. But I've used many brands of sealants over the years - mostly for generic indoor use. I don't recall ever having had an issue with any of them. This product I bought because I needed something to protect around the outside wooden window frame in some attic windows I was repairing. After 10 hours the sealant still hasn't cured 100% It's very sticky to the touch. I saw someone mentioned 3 days. At this rate that sounds right. The portion that was hanging out of the end of the used tube was still tacky too. Very rubbery. I suspect, once cured, this will be a very robust solution to waterproof joints on the outside of the house. I was expecting it to fully cure in a few hours though. There's no mention of the curing time on the tube anywhere. And I agree with the other reviews, there's a lot of waste if you don't use it all right away. A smaller portion would have been better for my needs but I suspect the cost for a smaller tube would be greater also. I saw nothing that looked like an expiration date on the tube. Home Depot is very good about returns/exchanges so I wouldn't worry about that too much. Anyway, I give it a mostly good review but if you need something with a faster cure time look elsewhere.
June 22, 2016
Rated 5.0 out of 5.0 by Major7 This stuff wears like iron
First, the cons.
1. This stuff is extremely hard to work with. It forms and feels like glue. Silicone is easy to work with a wet rag or even a damp finger. Not with this stuff. It will stay sticky on your hands for days.
2. Seven day cure time. 7 days!!!
Now, the pros.
1. This stuff lasts and lasts. I've been a homeowner since the early 90's. I've tried silicone and latex calks. They are pure garbage. Even with the right prep, they just can't handle the wear and tear of being outside. PL S40 wears like iron. I don't know the life expectancy, but it's greater than 8 years and I would estimate closer to 12. I've never seen it fail, or even think of failing. Amazing stuff!!
I just finished a restoration of an 85 year old wood garage door. 40 panels later, and I'm fully confident that door will good for the next 10-15 years based on my prior experience with this product.
Do it once. Do it right. Use Loctite PL.
August 17, 2015
Rated 3.0 out of 5.0 by Buck Great Caulk - But Use It Quickly
This is great caulk. It sticks tenaciously, stays flexible, and does not break down from weathering.
The problem is shelf life. If you're a contractor and use multiple tubes per week then you're good.
If you're a homeowner doing small fix up jobs you will waste a lot more of this caulk than you actually use. That's because it hardens in the tube in just a few weeks, even when unopened, and becomes unusable.
Oh, I almost forgot, when used as directed it takes 3 days of warm temperatures before it's paintable.
January 13, 2016
Rated 5.0 out of 5.0 by plugger812 My Sealant of Choice
I've been using this for awhile around the house and I used to use it when I had an RV. I have gotten away from silicone as I feel it loses it's adhesiveness to the suface to soon. Hence no more sealing. Also you can't paint over it or apply another sealant over it. This stuff is tough and sticks and stays. It's great on RV's as it's flexible and paintable. I like the heavier density of it to work with it. I'll agree it does dry kind of fast. I keep all my sealants/adhesives plugged and in a mini fridge. Saves wa$te. Great product!
Not to be a wise acre.... but did the guy who can't get it out of the tube puncture the seal inside the nozzle??
May 22, 2015
Rated 1.0 out of 5.0 by crazyjake8493 Absolute Junk.
I have tried 3 different tubes of this polyurethane caulk, hoping to seal around new door and window installs, and all 3 have been impossible to use. It is as though it has begun to harden in the tube before even being opened. I have used 3 other brands of polyurethane and elastomeric caulks when these have failed, and I have had great success with the other brands. Also had poor experiences with Loctite's Fast Grab adhesive, taking longer to adhere than "regular" speed adhesives. I would not buy this product again, and I would be hesitant to try any product made by Loctite ever again.
December 26, 2014
Rated 1.0 out of 5.0 by robert hard in tube even before use
I bought two tube of PL S40 and it is so stiff, you can not get your gun to squeeze it out. Thought I was buying quality, but I was wrong because I couldn't get it out of the tube to find out.
May 9, 2015
Rated 5.0 out of 5.0 by slomo door and window caulking
If your looking for a one time application, this is it. This stuff is super tacky and will stick to anything, long as it's clean. Then look out, don't try and take it apart. This is the best product I've found. Doesn't harden in the tube after you use it once. You can keep using it everyday for a week. All you do is peel off the nub on the end of the gun and caulk away. Does not harden in the tube. I'm buying more of this product.
Only gig I can give this is the cleanup from your hands. Think it says to use mineral spirits or equivalent. I use hand cleaner to remove it. But again for caulking you can't beat it.
November 19, 2013