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.

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💪 Seal Smart, Seal Strong – Concrete’s Best Defense!

SEAL WITH CONFIDENCE - Creates a fully waterproof, weatherproof barrier that stands up to the elements.
ECO CONSCIOUS FORMULA - VOC compliant and low odor for safer, cleaner application.
VERSATILE APPLICATION - Perfect for concrete, mortar, and masonry cracks—interior or exterior use.
RESISTS HARSH CHEMICALS - Durable against gas, oil, grease, and salt for industrial-grade protection.
SILICONE ENHANCED STRENGTH - Advanced silicone additives boost adhesion and flexibility for long-lasting repairs.

DAP Latex Concrete Sealant is a 10.1 oz, ready-to-use, waterproof and weather-resistant sealant designed to repair cracks in concrete, mortar, and masonry. Enhanced with silicone for superior adhesion and flexibility, it forms a durable, paintable barrier resistant to gas, oil, grease, and salt. Made in the USA, VOC compliant, and suitable for both interior and exterior applications.

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Product Dimensions	5.08 x 5.08 x 28.58 cm; 498.95 g
Part number	7079818096
Item display height	3 inches
Item display width	3 inches
Item display weight	1.3 Pounds
Material type	HAWA
Capacity	10.1 Fluid Ounces
Item volume	10.1 Fluid Ounces
Department	Unisex-Adult
Manufacturer	Dap
Item model number	7079818096
ASIN	B000H5S09G

Dap Latex Concrete Sealant,Gray, 10.1OZ

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