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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Marine Sealant & Adhesive

Product ID: 26693033

Details

Brand
SIKA
Item Form
Paste
Material
1-C
Special Feature
Water
Specific Uses For Product
Marine

⚡Highly elastic & vibration-resistant

🌊Marine-grade water resistance

🛠️One-component easy application

£19.97

Duties & taxes included

In stock

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Description

⚓ Seal the deal with marine-grade strength and style!

FLEXIBLE RESILIENT - Elastic formula absorbs vibrations, preventing cracks and corrosion over time.
EFFORTLESS APPLICATION - One-component polyurethane paste fits all piston guns for quick, mess-free use.
ULTIMATE MARINE PROTECTION - Seals wood, fiberglass & metal above & below waterline for unmatched durability.
PAINTABLE SANDABLE FINISH - Cures to a smooth black surface that can be customized for a professional look.
RESISTANT TO HARSH ELEMENTS - Withstands fresh & saltwater, diluted acids, fuels, and oils for long-lasting performance.

SIKA Sikaflex-291 LOT is a premium black, one-component polyurethane marine adhesive and sealant designed for wood, fiberglass, and metal. It offers superior elasticity, corrosion resistance, and water resistance in both fresh and saltwater environments. Easy to apply with standard piston guns, it cures to a paintable, sandable finish within 24 hours, making it ideal for professional marine and industrial sealing applications.

Specifications

ASIN	B00C50GIQI
Best Sellers Rank	#15,924 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Polyurethane Adhesives #44 in Urethane Adhesives
Brand Name	SIKA
Color	Black
Compatible Material	Fiberglass, Metal, Wood
Container Type	Cartridge
Customer Reviews	4.6 4.6 out of 5 stars (364)
Full Cure Time	24 hours
Included Components	Sealant
Item Form	Paste
Item Package Quantity	1
Item Type Name	Adhesive
Item Weight	10.1 ounces
Manufacturer	Sika USA
Material Type	1-C polyurethane
Model	90927
Number of Pieces	1
Other Special Features of the Product	Water Resistant
Part Number	90927
Specific Uses For Product	Marine, Underwater
UPC	033886005289
Unit Count	10.1 Fluid Ounces
Viscosity Level	Medium to High
Volume	10.1 fluid ounces
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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