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)

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

💧100% waterproof seal

🛠️Precision cartridge application

🛥️Premium marine-grade adhesion

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VT21321

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛥️ Seal your success with Sikaflex – where marine meets mastery!

WATERPROOF CONFIDENCE - Seals out moisture completely, safeguarding your craft against leaks and corrosion.
TRUSTED AMERICAN QUALITY - Made in the USA by Sika, a leader in professional-grade adhesives and sealants.
UNMATCHED MARINE STRENGTH - Engineered for the toughest marine environments, ensuring lasting durability and protection.
EASY PRECISION APPLICATION - Comes in a 10.3 oz cartridge for clean, controlled dispensing every time.
VERSATILE CRAFT COMPATIBILITY - Perfect for all your marine craft sealing and bonding needs, from repairs to new builds.

Sikaflex 291 White is a 10.3 oz marine adhesive and sealant cartridge designed for professional-grade waterproof bonding and sealing in marine craft applications. Made in the USA by Sika, it offers durable, precision application and reliable protection against water and environmental damage.

Specifications

ASIN	B007H2R9SK
Brand	SIKA
Brand Name	SIKA
Compatible Material	Fibreglass, Metal
Container Type	Cartridge
Country of Publication	USA
Customer Reviews	4.4 out of 5 stars 139 Reviews
Global Trade Identification Number	00033886000758
Included Components	1
Item Form	Strip
Item Package Quantity	1
Item Volume	300 Millilitres
Item Weight	10.1 Ounces
Manufacturer	Sika
Manufacturer Part Number	90925
Model	90925
Number of Pieces	1
Package Information	Cartridge
UPC	033886002707 338860007588 033886000758 033886000741
Unit Count	292.0001 Grams
Viscosity Level	Medium to High
Volume	300 Millilitres
Water Resistance Level	Waterproof

Reviews

A**R

30.01.2026

D**K

23.10.2025

R**Y

18.12.2025

L**A

21.01.2025

C**N

30.10.2024

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