What is the expiration date of these? They are difficult to use if beyond expire date.

I would not use this beyond its expiration date. Smarter to get fresh caulk as old caulk loses adhesion. This stuff is Soooo much better than anything else. But it needs to sit for 6-7 days before exposure to water in the bath or kitchen or paint anywhere else.

After I have filled the cracks can I apply more sikaflex on top of the existing sikaflex...Will it bond to itself?

Yes and no. A cured bond break will exist, but if you need to increase the fill of the caulkable gap, no harm will be created. You can reactive the existing caulk with a little acetone. BUT if it's a vertical fill, don't do it! You'll have a mess in your hands and everywhere else....

I need to seal stainless steel to concrete in an underwater pool setting with chlorine, is this the stuff to use?

I haven't had that kind of use for it, but this caulk seems very durable, and sticks pretty aggressively to everything.

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Polyurethane Sealant & Adhesive

Product ID: 18784330

Details

Brand
SIKA
Color
White
Full Cure Time
5 Days
Item Weight
16 ounces
Liquid Volume
10.1 Fluid

⏱️3 hr tack-free time

🌧️Waterproof & weather-resistant

🛠️Max 0.5 in joint depth

€ 38.55

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Seal Smart, Seal Fast — The Ultimate Edge in Joint Protection

RAPID CURE READY FAST - Tack-free in just 3 hours, fully cured within a week—get projects done without delay.
WEATHERPROOF DURABILITY - Urethane formula resists aging and harsh weather, ensuring long-lasting protection.
PRECISION FOR SMALL JOINTS - Perfectly seals joints up to 1/2 inch for flawless finishes on windows, doors, and flashing.
CERTIFIED QUALITY ASSURANCE - Meets ASTM C920 & NSF/ANSI 61 standards for reliable, safe performance.
ELASTICITY THAT MOVES WITH YOU - Accommodates ±35% joint movement to prevent cracks and tears under stress.

Sika’s Polyurethane Sealant & Adhesive is a high-performance, fast-curing solution designed for small joints up to 1/2 inch. Its urethane-based formula offers superior elasticity and weather resistance, making it ideal for both interior and exterior applications including windows, door frames, and submerged conditions. Certified to meet rigorous federal and Canadian standards, it ensures durable, waterproof sealing with a quick 3-hour tack-free time and full cure within a week.

Specifications

ASIN	B00461KMIY
Best Sellers Rank	#5,923 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Polyurethane Adhesives #50 in Urethane Adhesives
Brand Name	SIKA
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (726)
Full Cure Time	5 Days
Included Components	Cartridge
Initial Hardening Time	3 Hours
Item Form	Fl
Item Type Name	Adhesive
Item Weight	16 ounces
Liquid Volume	10.1 Fluid Ounces
Manufacturer	Sika USA
Material Type	Polyurethane
Maximum Gap Fill	0.5 Inches
Model	91017
Number of Items	1
Part Number	91017
Surface Recommendation	Concrete
Tensile Strength	175 Pounds Per Square Inch
UPC	033886002752
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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€ 38.55

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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