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Your cart is empty.Donseal PU440 is a one-component non-sag polyurethane sealant that cures by reacting with air humidity to form a tough and highly elastic low modulus sealant. Donseal PU440 has a very wide service temperature range. Suitable for vertical and horizontal joints, Basement walls, Precast concrete elements, For concrete, wood, marble, aluminum, steel, ceramic, gypsum boards, etc.
Mr. James
Reviewed in the United States on March 19, 2025
Nice quality Polyurethane Caulk that fits into a universal caulking gun. I used this to fill in some cracks in my sidewalk and front porch slab this couldn't have been easier. It dispenses very smoothly from the caulking gun and is easily molded into the areas. Very happy with the outcome so far.
LindsayJim
Reviewed in the United States on March 16, 2025
This caulk arrived arrived quickly and without damage.The item description is accurate, it dispenses smoothly. I’m especially pleased with the wide range of application temperatures. Adhesion is excellent as is cure time. Provided it holds up well for a year I’ll continue to be pleased.Would I buy this again, Yes.I use Amazon reviews every time when considering a product purchase. Here is my rating scale:5 Stars: Excellent product, no hesitation recommending or using.4 Stars: Good product with some limitations, could be improved.3 Stars: Fair product, can be made to work if your put your mind to it.2 Stars: Not very functional.1 Star: Don’t bother, it might even be painful.
F2
Reviewed in the United States on March 14, 2025
I usually buy polyurethane sealants because they are more durable on exterior applications compared to silicone sealants. Also, it can be applied on multiple surfaces. It seems to be high quality. The only con is that 1 cartridge arrived with the tip tilted and I hope it will be usable.
RFLORS
Reviewed in the United States on March 14, 2025
This is working fine in some cracks in my rear patio. Goes on/in with a caulking gun and couldn't be easier. Hopefully this keeps the moisture out when it freezes and they don't get any bigger. Materials look promising.
ComicStripBlues
Reviewed in the United States on March 13, 2025
Good concrete caulk at an excellent price for two tubes. Std size tubes fit regular caulking gun. Applies easily and sticks well in the basement wall cracks I need to seal. Durability and flexibility seem good so far.As far as packaging, the credit or fault belongs to Amazon. This time, my packaging was great. The twin tubes were put in a separate corrugated box with sufficient paper packing to prevent sliding, so the tubes arrived intact. Last caulk I ordered was the exact opposite - all that arrived was an empty plastic bag with a tube-sized hole, no caulk in sight.Thus, good product and good value but you roll the dice on who packages your shipment.
deimos
Reviewed in the United States on March 13, 2025
This product works as well as any I've tried in the past. It's thick enough to not flow away, yet thin enough to be able to get out of the tube and fill holes and gaps without too much force. At around $20 for two tubes delivered to your door, it's a good price. I'll update this review if I notice any issues as it wears over time. As others have stated, the packaging is a concern, as one of the tubes received had a bent end, but it was useable.
Shoe_Girl
Reviewed in the United States on March 10, 2025
I'm beginning to wonder the work ethics of the people who package because I have had far too many items shipped in questionable packaging. Yes, I know this is a product review but the packaging affects the product when someone clearly has no clue or care about how to properly package an item to it does not arrive damaged and unusable. Thanks to someone's ineptitude I received one tube with the nozzle bent and the other with the nozzle completely broken off.Nevertheless, the product itself is worth purchasing. The cost of $19.99 is very good compared to what HD or other hardware stores charge for concrete filler in a tube. Since I have been able to use the tube that is not mangled I tried it out on the cracks I have around the garage and house and it went on well and stayed put in the cracks on the wall. A lot of filler is too runny and utterly useless on wall cracks. This is not that. So while I try to figure out how to use the other tube and hope the person who packaged it goes to work else where....I highly recommend this if you are looking for something to fill cracks on vertical surfaces.5 stars for the product, minus 5 for the person who packaged this for shipping!
Bob
Reviewed in the United States on March 10, 2025
I've been putting off sealing the expansion joints in my driveway and sidewalks for too long. Taking advantage of the warm weather, I decided to start this overdue maintenance.The worst part of this job is getting the old sealant out and preparing for the application of new. Several hours later, with some installation of backer rod in the larger joints, I completed the area I was focusing on using Donseal PU440.This sealant was easy to apply using a standard caulk gun and was easy to work with (easy to tool and smooth). The immediate results are impressive, but of course, the critical metric will be longevity. For now, this looks good and seems similar to other products I've used that have yielded long lifespans, so fingers crossed.It installs easily and is priced competitively - Overall I'm happy with this.
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