Will this dry solid or is it flexible once dry?

its fairly solid - if you press on it it has the flex of the rubber tread on a car tyre

Would it be good for rubber seal on car doors

It is a permanent waterproof sealant, seems to be for total immersion, not sure it would be the right thing, Sika-Sikaflex do other automotive sealants/adhesives that might also work.

Would this seal a car windscreen and sunroof? Water leaking into car.

Yes it will do the job but is an adhesive as well as a sealant, there are other sealants for that purpose, Sikaflex goes off quickly so more difficult to work with and once you use some the remainder goes off, unless you seal it off well, I would look for a windscreen sealant, this is used mostly for glueing on panels..

I have a wooden hot tub and want to seal the inside joint between the sides and base. Is this suitable.

Hi Mike, If the joint will be permanently immersed then I'm sorry It's not suitable. Very few single part products are. If , on the other hand it's not for underwater, it will work perfectly. Hope that helps.

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Sikaflex 291i Black Multi-Functional Adhesive Sealant for Marine Application - Black

Sikaflex 291i Black Multi-Functional Adhesive Sealant for Marine Application - Black

Product ID: 47904794

Details

Brand
Sika
Item dimensions L x W x H
48 x 48 x 230
Item weight
0.4 Kilograms
Material
Polyurethane
Style
Cartridge

⚓Marine-grade waterproof seal

🖤Sleek black finish for seamless bonding

⏱️Fast curing for quick project turnaround

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Description

🛠️ Seal it like a pro — don’t let leaks sink your style!

SLEEK BLACK FINISH - Blends invisibly with dark surfaces for a professional look
RAPID BONDING POWER - Cures quickly to keep your projects on schedule without compromise
ULTIMATE MARINE SEALANT - Waterproof and weatherproof for lasting protection on boats and decks
CLEAN PRECISE APPLICATION - Easy tooling and smooth finish with manual or pneumatic guns
MULTI SURFACE COMPATIBILITY - Perfect adhesion on polyurethane, teak, tiles, windows, and doors

Sikaflex 291i Black is a high-strength, fast-curing polyurethane adhesive sealant designed specifically for marine applications. Its waterproof and weather-resistant formula ensures durable bonding and sealing on a variety of surfaces including teak decks, windows, and doors. Available in a sleek black finish, it offers clean, professional results with easy application using manual or pneumatic guns.

Specifications

ASIN	B004ZF8L0M
Best Sellers Rank	30,216 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 47 in Boat Maintenance Supplies
Brand	Sika
Colour	Black
Compatible Material	Polyurethane
Country Of Origin	Switzerland
Customer Reviews	4.6 4.6 out of 5 stars (3,504)
Global Trade Identification Number	07612894815047
Included Components	1 cartridge
Item Dimensions	48 x 48 x 230 millimetres
Item Form	Paste
Item Type Name	Sikaflex 291i Black Multifunctional adhesive sealant for marine applications
Item Weight	0.4 Kilograms
Manufacturer	Sikaflex
Manufacturer Part Number	291i Black
Material	Polyurethane
Model Number	291i
Number of Items	1
Number of Packs	1
Product Warranty	Product guarantees 0 months.
Style Name	Cartridge
Surface Recommendation	Door, Tile, Window
Unit Count	300.0 millilitre
Water Resistance Level	Waterproof

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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.

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TrustScore 4.5 | 7,300+ reviews

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B/.87

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered 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 Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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