Will this work to repair cracks in my pool skimmer? Is it elastic or hard like epoxy when cured?

It is elastomeric and should work well for that I would think. I used it to seal the roof seams on a 2015 GMC pickup and it worked great. Keep in mind it is self leveling so it spreads out a bit on its own.

Would this work for adhering rubber matting to a wooden and aluminum boat deck?

yes, it would work. A permanent solution would be 3M 5200 sealant. Try a small piece first!

can i use this to attach solar panels to camper roof? pnls weigh 24pnds.

I used mine for water proofing sealant while glueing down a metal flang which weighed very little. Not sure about the solar panels

Would this work in a swimming pool. I have a concrete pool that has plexiglass windows in the sides below the water level.

I believe so, we use it on the seams of our water slide that's underwater at all times.

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Sikaflex 291 White 10.3 oz. Cartridge Marine Adhesive/Sealant (Quantity 1)

Product ID: 242974623

Details

Brand
SIKA
Item Form
Strip
Item Package Quantity
1
Item Volume
300
Package Information
Cartridge

⚓Marine-grade strength

💧100% waterproof seal

🛠️Compatible with fiberglass & metal

¥20483

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Description

⚓ Seal the deal with Sikaflex—where marine meets mastery!

WATERPROOF CONFIDENCE - Creates a watertight seal that keeps your vessel dry and secure, no matter the conditions.
TRUSTED BY PROFESSIONALS - Rated 4.5 stars by 150+ users who demand the best in marine adhesive technology.
UNMATCHED MARINE DURABILITY - Engineered to withstand harsh saltwater environments for lasting protection.
PRECISION APPLICATION CARTRIDGE - 10.3 oz cartridge designed for clean, controlled sealing every time.
VERSATILE MATERIAL COMPATIBILITY - Bonds seamlessly with fiberglass and metal surfaces—perfect for all your marine projects.

Sikaflex 291 White is a premium 10.3 oz marine adhesive and sealant cartridge, delivering medium to high viscosity for superior waterproof bonding on fiberglass and metal. Trusted by professionals and DIYers alike, it offers durable, watertight seals essential for marine craft maintenance and repair.

Specifications

ASIN	B007H2R9SK
Brand Name	SIKA
Compatible Material	Fibreglass, Metal
Container Type	Cartridge
Country of Publication	USA
Customer Reviews	4.4 4.4 out of 5 stars (155)
Global Trade Identification Number	00033886000758
Included Components	1
Item Form	Strip
Item Package Quantity	1
Item Weight	10.1 Ounces
Manufacturer	Sika
Manufacturer Part Number	90925
Model	90925
Number of Packs	1
Number of Pieces	1
UPC	033886002707 338860007588 033886000758 033886000741
Unit Count	292.0001 Grams
Viscosity Level	Medium to High
Volume	300 Millilitres
Water Resistance Level	Waterproof

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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

1 month ago

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¥20483

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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