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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Sikaflex-291, White, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 10.1 fl. oz Cartridge (Pack of 1)

Sikaflex-291, White, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 10.1 fl. oz Cartridge (Pack of 1)

Product ID: 84441952

Details

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

🔗Superior adhesion strength

⏱️Fast cure time

🛥️Marine-grade durability

VT8775

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Description

🛠️ Seal it fast, seal it right — the pro’s marine adhesive!

RAPID SEAL ZERO WAIT - Fast tack-free time accelerates your project timeline without compromising quality.
MARINE GRADE TOUGHNESS - Resists fresh & sea water, acids, oils, and more for long-lasting performance above and below waterline.
UNIVERSAL BONDING POWER - Adheres flawlessly to fiberglass, gelcoat, metal, and wood—your all-in-one marine adhesive.
CERTIFIED SAFE RELIABLE - NSF & USDA approved for drinkable water and incidental food contact—trusted by pros.
FLEXIBLE VIBRATION RESISTANT - Elastic polyurethane formula ensures durable seals that withstand marine vibrations and movement.

Sikaflex-291 is a fast-curing, polyurethane marine adhesive and sealant designed for professional use on boats and marine vessels. It offers exceptional adhesion to multiple materials, superior resistance to water and chemicals, and elasticity to withstand vibrations. NSF and USDA approvals make it safe for potable water applications, making it the go-to sealant for durable, reliable marine repairs and construction.

Specifications

ASIN	B01GPIXX5Y
Best Sellers Rank	#5,738 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #31 in Silicone Adhesives #50 in Adhesive Caulk #101 in Industrial Sealants
Brand Name	SIKA
Color	White
Compatible Material	Fiberglass, Metal, Wood
Container Type	Cartridge
Customer Reviews	4.6 4.6 out of 5 stars (1,320)
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 Type	1-C polyurethane
Model	90919
Number of Pieces	1
Other Special Features of the Product	Fast Curing
Part Number	90919
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

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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.

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Excellent communication throughout the order process. Product is perfect.

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VT8775

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered 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 Vanuatu.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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The delivery time was excellent, and the packaging was secure.

2 months ago

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