Does the black caulk dry to a gloss, or is it more matte finish, like a dull rubber?

it still retains a dark matte color I would not say dull, but not a gloss finish

Will it bond to bare aluminum to seal around the rivets?

Yes, I used it to seal my roof fans on my Sprinter. It adhered to painted metal (scored the paint), wood framing of the opening, plastic shroud and aluminum pressure plates. I am extremely satisfied with this product and from the day installed, it shows no wear even after a year. Excellent product... Another really good product is 3m 4200 Marine Adhesive...

Will this bond to rubber?

Not sure about rubber, but everything else I happened to get it on and let dry it stuck like paint. My clothes, stainless railings, fiberglass cabin, teak of course, cork fishing rod handle, my leather wallet. . .

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Marine Sealant & Adhesive

Product ID: 84441952

Details

Brand
SIKA
Item Form
Gel
Material
1-C
Special Feature
Fast Curing
Specific Uses For Product
Boating

🌊Resistant to fresh & sea water, acids, oils & fuels

⏱️Fast cure time under 24 hours

🛥️Superior adhesion to gelcoat, fiberglass, metal & wood

€ 35.05

Duties & taxes included

In stock

Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal the deal with speed and strength – your boat’s best defense!

UNMATCHED DURABILITY - Engineered to withstand harsh marine environments including saltwater, fuels, and caustics.
MULTI SURFACE MASTERY - Bonds flawlessly to fiberglass, metal, wood, and gelcoat for versatile marine applications.
RAPID MARINE GRADE SEAL - Fast tack-free time means your projects stay on schedule without compromising quality.
CERTIFIED SAFE PAINTABLE - NSF & USDA approved for incidental food contact and can be painted to match your vessel.
ABOVE BELOW WATERLINE CONFIDENCE - Reliable performance whether exposed to waves or dry dock conditions.

Sikaflex®-291 is a professional-grade marine sealant and adhesive offering fast curing, exceptional elasticity, and robust resistance to water, chemicals, and oils. Trusted by boat builders, it bonds to multiple surfaces and performs reliably above and below the waterline, with NSF and USDA approvals ensuring safety and versatility for marine maintenance and repair.

Specifications

ASIN	B01GPIXX5Y
Best Sellers Rank	#7,297 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #48 in Silicone Adhesives #51 in Adhesive Caulk #105 in Industrial Sealants
Brand	SIKA
Brand Name	SIKA
Color	White
Compatible Material	Fiberglass, Metal, Wood
Container Type	Cartridge
Customer Reviews	4.6 out of 5 stars 1,343 Reviews
Included Components	10.1 fl oz Cartridge
Item Form	Gel
Item Package Quantity	1
Item Type Name	Adhesive
Item Weight	300 g
Manufacturer	Sika USA
Material	1-C polyurethane
Material Type	1-C polyurethane
Model	90919
Number of Pieces	1
Other Special Features of the Product	Fast Curing
Part Number	90919
Special Feature	Fast Curing
Specific Uses For Product	Boating
Tensile Strength	260 kips_per_square_inch
UPC	033886005258
Unit Count	10.1 Fluid Ounces
Viscosity Level	Medium
Volume	10.1 fluid ounces
Water Resistance Level	Water Resistant

Common Questions

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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.

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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