can one put a second cost on first in the crack?

Not sure what you're asking. Applying a second coat to a crack in the stuff that's already there? If that is the question, you can, but it won't last. If you're in a rental it beats waiting for the landlord to act. If it's your property, best to do it right instead.

Is this a good option to seal small outside cracks around some windows? and then ok to mortar over this? please advise...thanks!

I have had good results using this product to seal cracks in concrete walkway & driveway but never around windows nor have I tried to mortar over it.

Does this have any benefits over real morter to fill cracks or its just easier to use?

Can be used to fill small cracks only.

Dap Concrete And Mortar Filler And Sealant Gray 10 1

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Description

🛡️ Seal the deal with confidence—your concrete’s new best friend!

PAINT READY FINISH - Seamlessly paint over with latex or oil-based paints to maintain a professional, flawless look.
FLEXIBLE LOW ODOR - Silicone-enhanced flexibility prevents cracking while keeping your workspace comfortable with low odor.
UNMATCHED DURABILITY - Resists gasoline, salt, grease, and oil for long-lasting concrete protection that stands up to harsh conditions.
EFFORTLESS APPLICATION - Ready-to-use formula means no mixing or additives—get your project done faster and cleaner.
INTERIOR EXTERIOR VERSATILITY - Perfect for both indoor and outdoor concrete repairs, ensuring your surfaces stay pristine year-round.

DAP Concrete and Mortar Filler & Sealant is a 10.1 oz ready-to-use, silicone-enhanced paste that creates a durable, flexible, and 100% waterproof seal on concrete and masonry surfaces. It cures quickly with a 24-hour return to service, resists harsh substances like gasoline and salt, and is paintable for a clean finish. Ideal for both interior and exterior repairs, it offers low odor and easy water cleanup, making it the go-to solution for professional-grade concrete crack repair.

Specifications

ASIN	B000H5S09G
Best Sellers Rank	#938 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Hardware Sealers
Brand	DAP
Brand Name	DAP
Color	Gray
Compatible Material	Concrete
Customer Reviews	4.5 out of 5 stars 2,292 Reviews
Global Trade Identification Number	00070798180215
Included Components	1 Tube
Item Dimensions	2 x 2 x 11.25 inches
Item Form	Paste
Item Type Name	concrete sealant
Item Weight	1.1 Pounds
Item dimensions L x W x H	2 x 2 x 11.25 inches
Manufacturer	DAP PRODUCTS INC.
Material	Silicone
Material Type	Silicone
Model	7079818096
Number of Items	1
Part Number	7079818096
Style	Tube
Style Name	Tube
Surface Recommendation	Exterior/Interior
UPC	070798180215
Unit Count	299 Milliliters
Warranty Description	If not satisfied with product performance when used as directed, return used container and sales receipt to DAP Products Inc., Technical Customer Service, 2400 Boston St., Suite 200, Baltimore, MD 21224, for product replacement or sales price refund. DAP will not be liable for incidental or consequential damages.
Water Resistance Level	Waterproof

Reviews

A**R

27.04.2026

W**R

15.04.2026

C**Z

9.02.2026

C**G

13.08.2024

A**R

25.03.2026

A**H

16.04.2026

C**L

16.02.2026

T**S

7.12.2025

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VT4157

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