Anyone used this on brick walls horizontal & vertical to repair mortar preventing water penetration due to cracked mortar?

Yes. For me has worked with cracks in our bricks. Works well with other types of concrete. Have used it for Pavers up against the house.

Can this be used as a caulk between the concrete patio and house concrete foundation to keep water away?

Exactly what I used it for and the color match was decent enough not to look to bad. Have image will try and load somewhere, since they won’t allow you to here.

We have a 5" narrow crack in the cement basement floor that slowly, but continuously, seeps water. Can we still use this product?

Wrong product. This is when you want the crack filler (available in quart bottle). You want to squeeze as much into the crack as possible. That said, given that it's continuously seeping water, you have hydrostatic pressure on the other side of that floor, and you need to deal with that or you will never have a permanent solution. This involves things like french drains and sump pumps. It is very common when water is flowing underground by your house.

Can I use it to fill/repair the gap around the toilet flange?

I am not sure if this would work for filling gap at toilet flange. I used it to seal cracks in patio.

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🔧 Seal it, protect it, own it — the ultimate watertight fix!

EFFORTLESS FINISH - Paintable surface lets you customize without hassle.
CLEAN CONVENIENT - Water cleanup means no toxic mess, just smooth results.
WEATHERPROOF WONDER - Silicone additives boost adhesion and ensure superior waterproof protection.
SEAL WITH CONFIDENCE - High-performance latex formula repairs cracks and holes seamlessly.
VERSATILE APPLICATION - Perfect for concrete, mortar, and masonry—inside or out.

DAP 18021 is a premium gray, latex-based concrete and mortar filler and sealant in a 10.1 oz cartridge, sold as a convenient 3-pack. Enhanced with silicone for superior adhesion and waterproofing, it’s designed for durable interior and exterior repairs on concrete, mortar, and masonry surfaces. Paintable and easy to clean with water, this American-made sealant delivers professional-grade results for lasting protection.

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Material	Silicone
Brand	DAP
Style	Compact
Item Weight	10.1 Ounces
Item dimensions L x W x H	21 x 15.9 x 30.5 Centimeters
Water Resistance Level	Waterproof
Item Form	Liquid
Net Quantity	30.3 millilitre
Number of Items	3
Colour	Gray
Surface Recommendation	Concrete
Manufacturer	Dap Incorporated
Country of Origin	USA
Model number	18021
Item Weight	286 g
Product Dimensions	20.96 x 15.88 x 30.48 cm; 286.33 g
Item model number	18021
Item Height	12 Inches
Item Width	6.25 Inches
Are batteries included?	No

Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack

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