can this be used in-between cement joints in a walkway?

Sika’s self-leveling sealant (and backer rod) is the most appropriate product for that situation. The backer rod prevents 3 point adhesion, which you should look up before performing this job. Self-leveling sealant will flow downhill if used on a slope, so the construction sealant might be a better choice in that particular case.

If used to fill gaps between tiles, how does this (polyurethane) compare with epoxy grout ?

This has a silicone texture, I will use it in for the outdoor area. I would not use this to fill gaps between tiles, you should use epoxy grout especially if it's indoor.

Will this adhere to asphalt for the crack between driveway and cement apron? I’d rather use a weatherproof flexible sealant than asphalt cold patch.

It should! This was recommended by the company who raised up three LARGE concrete patio slabs. Unfortunately, the slabs had all moved in different directions, letting water sit up against the foundation. Once raised up, with settling of earth underneath, a couple of the slabs cracked. I used this sealant to fix those cracks. It's remained in place through two Pacific Northwest (wet) winters. It's remained flexible, keeping slab pieces together with no slippage. Good product!

Can I throw some sand on top of horizontal morter cracks after applying the Sikaflex to give it texture?

I think you can. Think of it as a kind of epoxy. If you throw some sand on its surface before it dries, the sand will end up imbedded in it.

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Sikaflex - White - Construction sealant (White) - All-Purpose Polyurethane sealant - for All Types of Joints 1/2" or Smaller - 10.1 fl oz

Product ID: 276474157

Details

Brand
SIKA
Item dimensions L x W x H
29.2 x 5.1 x
Item weight
1 Pounds
Material
Polyurethane
Style
Compact

🎨Paintable, stain-free finish

🔒Tight, elastic polyurethane seal

🌧️Weatherproof & waterproof protection

S$53

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Description

🔧 Seal smart, live smarter — the pro-grade finish your home deserves!

INVISIBLE PERFECTION - Self-leveling, paintable, and stain-free for a flawless finish that blends seamlessly.
WEATHERPROOF YOUR SANCTUARY - Seals all joint types against moisture infiltration in brick, wood, concrete, and metal.
CERTIFIED QUALITY YOU CAN TRUST - Meets ASTM and federal specs, reducing radon exposure with urethane-based safety.
EFFORTLESS PRECISION APPLICATION - 10.1 fl oz cartridge fits all standard guns with a narrow tip for exact placement.
UNBREAKABLE SEAL UNMATCHED FLEXIBILITY - Elastic polyurethane formula prevents cracks and tears for lasting durability.

Sika Sikaflex White is a professional-grade, one-component polyurethane sealant designed for all joint types 1/2" or smaller. It offers superior elasticity to prevent cracking, is fully weatherproof and waterproof, and can be painted or sanded for a seamless finish. Certified to ASTM standards, it ensures durable, radon-reducing protection with easy, precise application from a 10.1 fl oz cartridge.

Specifications

ASIN	B000RUOH1Q
ASIN	B000RUOH1Q
Best Sellers Rank	#7,244 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #29 in Silicone Sealers
Brand Name	SIKA
Color	White
Compatible Material	Plastic
Customer Reviews	4.5 4.5 out of 5 stars (975)
Customer reviews	4.5 4.5 out of 5 stars (975)
Date First Available	28 April 2017
Global Trade Identification Number	00033886000413
Included Components	Multitool Accessory
Is Discontinued By Manufacturer	No
Item Dimensions	29.2 x 5.1 x 29.2 centimeters
Item Form	Liquid
Item Type Name	10OZ WHT Const Sealant
Item Weight	1 Pounds
Item model number	90618
Manufacturer	SIKA CORPORATION
Manufacturer	SIKA CORPORATION
Material Type	Polyurethane
Model	90618
Number of Items	1
Number of Packs	1
Part Number	90618
Product Dimensions	29.21 x 5.08 x 29.21 cm; 453.59 g
Style Name	Compact
Supported Standards	ASTM C-920, TT-S-00230C, Type II
Surface Recommendation	Door
UPC	033886000413 033886093873
Unit Count	1 Count
Water Resistance Level	Waterproof

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S$53

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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TrustScore 4.5 | 7,300+ reviews

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