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.

Sikaflex 291 White 10 3 Oz Cartridge Marine Adhesive Sealant

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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72974CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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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	SIKA
Brand Name	SIKA
Compatible Material	Fibreglass, Metal
Container Type	Cartridge
Country of Publication	USA
Customer Reviews	4.5 out of 5 stars 150 Reviews
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 Pieces	1
Other Special Features of the Product	Marine Adhesive/Sealant
Package Information	Cartridge
Special Feature	Marine Adhesive/Sealant
Specific Uses For Product	Craft
UPC	033886002707 338860007588 033886000758 033886000741
Unit Count	292.0001 Grams
Viscosity Level	Medium to High
Volume	300 Millilitres
Water Resistance Level	Waterproof

Reviews

S**.

A1 ++

Toujours le best pour les bateaux!

4.08.2026

J**T

White Caulk for the win

Best caulk I’ve ever had the pleasure to work with. Filled the cracks like none other. You know, I was debating the Black Caulk, because I thought it might be more filling, but the white Marine Caulk, was enough to get the job done.

15.06.2026

P**E

Automotive trim seal

Best product for my application

24.07.2026

A**R

Good adhesive for a boating project

I used this to attach a heavy duty rub rail on my old BW Outrage (belt and suspenders approach, I didn't trust that the screws that came with the rub rail would work). It's been six months since I did the work and it seems to be holding well. Cures somewhat quickly which makes it tricky to use on a large area in summer heat. I'd use it again before the #M product.

30.01.2026

D**K

Great

It's sikaflex works great on boats , cheaper than in town also

23.10.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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4 days ago

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72974CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago