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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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

129 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

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

UNMATCHED DURABILITY - Engineered to withstand harsh marine environments—saltwater, sewage, acids, and oils included.
MULTI SURFACE MASTERY - Bonds flawlessly to fiberglass, metal, wood, and gelcoat for versatile marine applications.
RAPID CURE READY TO GO - Get your marine projects sealed and secured in record time with fast tack-free action.
CERTIFIED SAFE PAINTABLE - NSF & USDA approved for incidental food contact and can be painted to match your vessel’s style.
ABOVE BELOW WATERLINE CONFIDENCE - Reliable performance whether exposed to air or submerged, ensuring lasting seals.

Sikaflex®-291 is a professional-grade marine sealant and adhesive offering fast curing, exceptional elasticity, and robust adhesion to multiple materials. Trusted by boat builders, it resists fresh and saltwater, chemicals, and oils, making it ideal for above and below waterline applications. NSF and USDA approvals ensure safety for incidental food contact, while its paintability and vibration resistance make it a top choice for durable marine repairs and maintenance.

Specifications

ASIN	B01GPIXX5Y
Best Sellers Rank	#5,846 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #31 in Silicone Adhesives #44 in Adhesive Caulk #87 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 1,339 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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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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

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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129 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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