Dap 7079818816 18816 Polyurethane Construction Adhesive and Sealant, 10.1 oz, Black

I couldn't even open it

I couldn't use the product because it was dry. It has good quality but be sure seller doesn’t send you old product. Otherwise, like me, you will throw it away without using it.

وصلني المنتج فاسد السليكون متجمد تم اكتشاف ذالك بعد انتهاء فترة الإرجاع حين قمت بإستخدامه

product wa already dried up.

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!

El producto estaba completamente tapado de la parte superior, una vez hecho el corte en el aplicador y utilizando una pistola de presión, el contenido no salía, después de aplicar demasiada fuerza, apenas logró moverse y comenzó a salirse por la parte de abajo.

Excellent for roof

Needed to seal leak along base of garage wall, worked well and no longer get water. It bonded to both wood and concrete, and we have since had a big storm and no water came through. I was honestly not expecting it to work, so I was very pleased. Was very thick, and a bit hard to apply, but I also have weak hands so not going to be too hard on it. Stronger people probably have less issues. It worked, and that is more important. Was a bit expensive, but it went a long ways. I will see how it lasts over time to give it my full approval, but if it holds up for a reasonable amount of time, I would use again.

Very sticky and adheres very well to concrete, a bit messy and takes quite a while to dry especially if it is laid thick. However it is all worth it as once it adheres and dries (which took a week in the middle of the summer at 100+ degrees almost every day) you can drive on it without any issues