Will this adhere well to wood?

This stuff sticks to anything better than any product I've ever used. It will stick to wood really well.

Would this work to attach flexible solar panels to the roof of a cargo van?

Contrary to the other answers, the Sikaflex manufacturer's website indicates that it is also a high strength adhesive: Sikaflex®-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive. Sikaflex®-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics.

would this be great stuff to seal an aluminum enclosed trailer roof?

I am on a horse trailer forum and this was recommended by several people with 60+ years in trailer repair. They swear by it.

Can 221 be used for Aluminum Boat repair below water line?

Not positive but think it can not be used like that

017 90892 Sikaflex 221 Aluminum Gray

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€ 23.90

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal it once, seal it forever—Sikaflex-221 keeps your projects road-ready and worry-free!

FAST TRACK ADHESION - One-component polyurethane that cures quickly for instant, lasting bonds.
UNMATCHED DURABILITY - Engineered to withstand relentless road shocks and abuse without losing grip.
VERSATILE COMPATIBILITY - Perfectly bonds with aluminum and multiple surfaces—ideal for RVs, trailers, and buses.
FINISH READY FLEXIBILITY - Sandable and paintable for seamless, professional-grade finishes every time.
CERTIFIED SAFE RELIABLE - NSF approved for potable water and incidental food contact—trust in every application.

Sikaflex-221 Aluminum Gray is a top-tier one-component polyurethane sealant and adhesive, renowned globally for its fast curing, permanent elastic adhesion, and exceptional resistance to cuts, tears, and weather. Designed specifically for heavy-duty applications like truck, trailer, RV, and bus manufacturing, it maintains strength and waterproof integrity over countless miles. NSF approved and paintable, it offers professional-grade versatility in a 10 oz tube.

Specifications

ASIN	B004RCX8XS
Best Sellers Rank	#14,495 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Polyurethane Adhesives
Brand	AP Products
Brand Name	AP Products
Color	Aluminum Gray
Compatible Material	Aluminum
Container Type	Tube
Customer Reviews	4.5 out of 5 stars 293 Reviews
EU Spare Part Availability Duration	5 Years
Included Components	Auto part, Automotive Accessories, Replacement and Performance parts
Item Form	Product
Item Package Quantity	1
Item Type Name	Sikaflex 221 Alum Gray 30
Item Weight	15.2 ounces
Manufacturer	AP Products
Material	Polyurethane-based adhesive
Material Type	Polyurethane-based adhesive
Model	1790892
Other Special Features of the Product	Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact
Part Number	017-90892
Special Feature	Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact Special Feature Extra-strong bonding capabilities, Heat Resistant, Moisture Resistant, Durable, Sandable, Paintable, NSF Approved for Food Contact See more
Specific Uses For Product	Bus, RV, Trailer, Truck
UPC	338860051048
Unit Count	10.1 Fluid Ounces
Viscosity Level	Medium
Volume	300 Milliliters
Warranty Description	Manufacturer Warranty
Water Resistance Level	Waterproof

Reviews

F**T

6.11.2018

H**I

9.01.2025

T**O

1.05.2026

F**S

29.08.2022

M**N

24.07.2024

B**J

14.05.2024

J**L

24.10.2024

T**I

19.08.2025

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€ 23.90

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In stock

Sold byAmazon ItalyDelivered 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 Italy.

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