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 Lot Black 10 3 Oz Cartridge Marine Adhesive

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

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225.28 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

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Description

⚓ Seal the deal with marine-grade strength and water resistance!

TRUSTED BY PROS - Backed by a 4.6-star rating from 150+ users who rely on its performance and durability.
LONG LASTING CURE - Fully cures in 72 hours, delivering a hard, resilient coating that stands the test of time.
GEL POWER ADHESION - High viscosity gel formula ensures strong, durable bonding on metal, plastic, and wood.
MARINE GRADE TOUGHNESS - Specifically engineered for harsh marine environments—resists wear and weather.
ULTIMATE WATER DEFENSE - Seals and protects with superior water resistance for marine and wall applications.

Sikaflex 291 LOT Black is a high-viscosity silicone marine adhesive and sealant in a convenient 10.3 oz cartridge. Designed for metal, plastic, and wood, it offers superior water resistance and strong adhesion, curing fully in 72 hours. Ideal for demanding marine and wall sealing tasks, it combines professional-grade durability with user-trusted performance.

Specifications

ASIN	B00C50GIQI
Best Sellers Rank	1,204,163 in DIY & Tools ( See Top 100 in DIY & Tools ) 920 in Caulk
Brand	Sika
Colour	Black
Compatible Material	Metal, Plastic, Wood
Container Type	Cartridge
Customer Reviews	4.6 out of 5 stars 152 Reviews
Full Cure Time	72 Hours
Item Form	Gel
Item Package Quantity	1
Item Volume	10.1 Fluid Ounces
Item Weight	10.1 Ounces
Item form	Gel
Manufacturer	Sika
Manufacturer Part Number	90927
Material	Silicone
Model Number	90927
Number of Pieces	1
Other Special Features of the Product	Water Resistant
Special feature	Water Resistant
Specific Uses For Product	Marine, Wall
Specific uses for product	Marine, Wall
UPC	033886005289
Unit Count	300 Millilitre
Viscosity Level	High
Water Resistance Level	Water Resistant

Reviews

S**V

Works well

Works well, strong adhesion & hard cured coating

18.05.2026

S**Y

Good product

Good product.

1.01.2026

G**T

This is worth every penny

Best stuff for outdoor applications

28.08.2026

O**O

Excelente artículo, lo volvería a comprar

Muy bueno, aunque debe saber que demora unas 48 horas para que seque bien y más si es muy grande el grosor que aplicó pero calidad extrema

29.07.2026

A**R

Used for wetsuits

Excellent product for gluing storage pockets onto wetsuits or for neoprene repair.

4.02.2026

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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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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3 weeks ago

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225.28 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago