DAP Premium Polyurethane Construction Adhesive Sealant

After heavy rains this winter I discovered a leak onto our bedroom ceiling. Upon checking our roof I found a badly broken tile and began a search for materials suitable for its reliable long-term repair. My key criteria included: * Exceptional bonding to my cement tile material * Long-term elasticity to accommodate differential expansions over time and weather conditions * Waterproof to a maximum extent to resist debonding after months & years of winter rains * Ability to last for years of exposure to direct sunlight and high rooftop temperatures * Be easily workable and able to readily wet to my bonding surfaces to achieve a reliable long-term waterproof bond In the past I have used black Polyurethane roof-patching materials with good success, particularly when I pretreated the area to be sealed with a painters solvent to achieve extremely good surface wetting of difficult to clean, often dusty rooftop surfaces. For my current tile-bonding application, I should be able to achieve good surface cleaning, and my previous black Polyurethane roof-patching material was no longer available. So after reviewing a number of bonding-material candidates I went with this DAP material in a gray color to sort-of match the gray tile. The one apprehension I had was the number of negative reviews about the excessive stiffness of the material as received by some Amazon reviewers. As my tile crack was weathered and filled with dirt, I decided to open my tile crack up into a V-groove with a diamond saw...thus producing smooth virgin tile surfaces for the caulk to bond to. The V-groove also aids in working the caulk into the joint to assure total filling and thorough surface contact. To expand the total bond area, the surface of the tile was also thoroughly cleaned adjacent to the groove and along the tile edges with an angle-grinder power wire brush to allow the crack adhesive to be spread out onto the tile surface adjacent to the V-groove and to seal the tile left longitudinal side crack which feeds water to the overlap seal with the adjacent tile. Since the lower part of the overlap seal on the left side is interrupted by the break, and is not visible from the surface, it represents a more difficult situation to reliably seal. This was addressed by buttering the left overlap seal break area with caulk before sliding the tile piece into place, and then filling the left-hand tile joint with caulk to minimize water reaching this difficult sealing area. Despite a number of negative comments about the excessive stiffness of the DAP caulk, it was found to be exceptionally easy to eject and spread, and appeared to wet surfaces immediately, and trowel smoothly, promising a excellent waterproof bond. My guess is that those negative reviews about excessive stiffness may be associated with folks that didn't recognize the cartridge is shipped with an internal diaphragm that must be punctured with a ram rod down the snout after the cone tip is cut off. Once this was done, my caulk flowed extremely easily. So far...highly recommended. We'll see how long it lasts!

I did a lot of research and settled on this product to complete the project I was performing. I have a cinder block home that has stucco over it then painted. There seems to be a shift in the foundation over the years and there were numerous cracks on the outside walls. While I new this profuct would not hold my house together, not only do the cracks look bad, but water and bugs could get inside the walls. I read the directions and put on some rubber gloves since this stuff is heck to get off your hands, and basically ran a bead of it on top of the cracks then pushed it in and smoothed it around to blend in with the stucco. It says to wait 7 days to paint over it with no primer needed. I painted over it in 7 days and it looks professionally done. I would buy this product again if needed.

Had to put back together a piece of concrete that had been manufactured to look like unpolished granite with gray veins throughout. Dopey kids stood on it and cracked it in a bunch of places. This gray adhesive allowed us to put the slab back together perfectly. You’d never know it was cracked. Highly recommend

Obviously, this is a quality product based on reviews. However, if you're a novice at applying caulk, I highly suggest you skip this product. The first challenge is trying to get the product to come out of the caulk gun. Left in sun for two hours, no luck. The tube finally burst and then the real fun began. It has the consistency of chewing gum. I ended up applying and smoothing out with my finger. The end result was NOT a pretty caulk line but a messy one. I'm sure a professional caulker could apply this product easily if they're able to get the product to come out of the tube, but not an amateur. In a nutshell, if you enjoy playing with sticky chewing gum, this is your jam!

Bought 2 tubes actually. I had to plug up a few dozen holes in the floor where lag bolts used to be. This stuff worked GREAT!!! - after I figured out that the hole and floor around it had to be clean - which is what I would have known if I read the instructions first. These holes are in a floor that has been treated with an epoxy coat, so it was important to sweep, brush hole with wire tooth-brush tool, and wipe away all the fine dust with a damp cloth. Next day I plugged the holes with DAP and calk gun. Needed some good grip strength to work the caulk gun. It gets easier as the tube empties out. I FORGOT a putty knife to make the plugs flat to the floor with a little bit of a collar around each hole for sealing. Greg cardboard worked fine. Set up was about a day, and 3 days later we were moving stuff over the holes and the DAP held in fine. I like this stuff, and probably will tend to buy it if I need it here again or at home. It is a little more expensive than some of the other products, but it is worth it for its durability. Oh, it was a little smelly during application, but smell was gone the next day. ThankS! : )