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Model # 1675293

Internet # 203163736

Store SKU # 184282

PL S40 10 fl. oz. White Polyurethane Window, Door and Siding Sealant

This item has been discontinued.
The Home Depot no longer carries this specific product.

$5.85 /each




Model # 1675293

Internet # 203163736

Store SKU # 184282

Loctite PL S40 Polyurethane Window, Door and Siding Sealant is a premium quality commercial grade sealant developed especially for forming permanent, water and weather resistant seals in most exterior gaps and joints. This sealant exhibits outstanding durability, tear resistance and a movement capability of ± 25% which accommodates construction material movement to protect the original seal. Loctite PL S40 Polyurethane Window, Door and Siding Sealant is UV and ozone resistant, and does not soften in the sun. It is also CARB (California Air Resources Board) compliant.

California residents: see  Proposition 65 information

  • Polyurethane formula is durable and weatherproof to withstand harsh exterior environments
  • Paintable to blend with surrounding surfaces for a professional finish
  • One-time application, heat and UV exposure will not deteriorate sealant over time
  • Permanently flexible, excellent for use on expansion joints
  • Low VOC formula complies with Federal and State regulations Nationwide
  • Subject to or will include a recycling fee in the following states: CA, OR
  • Click here to learn more about sealant solutions by Loctite
  • Note: Product may vary by store.

Info & Guides

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Individual size (oz.) 
Caulk Form 
Standard Tube 
Caulk Type 
Coverage (linear ft.) 
Cure time (hours) 
Dry color family 
Dry to touch (min.) 
Fire and high heat resistant 
Longevity (years) 
Moisture Resistant 
Mold and mildew resistant 
Paint Product Type 
Permanently flexible 
Professional Paint Supplies & Values 
Pro Supplies 
Warranty / Certifications
Certifications and Listings 
ASTM Compliant 
Manufacturer Warranty 


Rated 3.7 out of 5 by 7 reviewers.
Rated 5.0 out of 5.0 by 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 5.0 out of 5.0 by 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 4.0 out of 5.0 by good stuff, check the dates I use these types of products all the time and my first advice to anyone buying any of these tubed caulks and adhesives is to check the manufacture date. Most of these things have a shelf life of 12 months under ideal conditions. The frustrating part is finding the manufacture dates so you can tell, before you buy the stuff, if it is fresh, near expiration or useless. Locktite has a cryptic date code stamped into the tube, pretty poor planning for a big time manufacturer. Make it easy to read, stamp it right on the tube, somewhere, anywhere. I had to actually call Locktite in the store to get a straight answer. Regardless of what you buy, I'm sure they would all work great if it is fresh. As it was, the pile of tubes I had to sort through in Home Depot, the newest stuff had one month left and 8 were six months past their expiration. I can't fault Home Depot or any other store, to dedicate employees to look for expired caulks and adhesives would be silly. I would like to think they have a process for getting rid of expired stuff. Sure, they will refund your money, but what about the manhours wasted removing bad caulk and doing the job again. Considering the nature of this job, of caulking windows and siding, unless you actually checked the caulk the next day most people would not know if it was bad and didn't cure. Of the 7 tubes I bought, one tube ruptured although the caulk was in fine condition. Perhaps the tube had fallen and bent, weakening the tube. In conclusion, check the expirations dates, buy the freshest and check the physical condition of the tubes for damaged or weak spots. If I have any complaints it would be that the age of the store stock was so old. If you read other reviews and see negative comments, compare their problems to the advice I just gave. June 15, 2015
Rated 5.0 out of 5.0 by 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
Rated 1.0 out of 5.0 by 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 1.0 out of 5.0 by 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 5.0 out of 5.0 by Review caulking? What can I say - it worked. I have to use this product on my MoHo roof. Sprang a small leak around the sunroof. This is the stuff for a poly roof. I wish all caulking companies would make a "half tube". It hurts to watch the rest of the tube dry out by the time you use it again. August 25, 2013
  • 2015-10-09T10:43:50.522-05:00
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