# SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz

SIKA Sikaflex-221 is a white, multi-purpose sealant and adhesive in a 10.1-fluid-ounce size. Its listed polyurethane composition and paste form suit buyers seeking one product for sealing or bonding, while application requires clean, dry surfaces and finishing before the surface skins over.

- [Original product page](https://best-deals.pro/product/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [View offer](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- Market: US
- Language: en-US
- Currency: USD
- Brand: SIKA
- Model: 017-90891
- Category: Tools & Garden > Hardware & Building Materials
- Price: 11.10 USD
- Previous price: 13.18 USD
- Discount: 16%
- Price checked: 2026-11-12T11:10:07.233Z
- Rating: 4.6 / 5
- Reviews: 3153

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing describes a one-component urethane paste for sealing and bonding.
- Manufacturer claims adhesion to metals, plastics, metal primers and coatings, and ceramic materials.
- The cartridge is described as compatible with electric, pneumatic or manual application guns.
- The listing says the product cures through exposure to atmospheric moisture.

## Pros

- One product is presented for both sealing and bonding across several listed material types.
- The stated 10.1-fluid-ounce volume gives buyers a defined single-item size.
- The listing identifies roof, vent and pipe surfaces as recommended applications.

## Specifications

### Identity
- Brand: SIKA
- Model: 017-90891
### Product details
- Color: White
- Material: Polyurethane
- Form: Paste
- Liquid volume: 10.1 fluid ounces
- Number of items: 1
- Surface recommendation: Roof, Vent, Pipe
- Maximum gap fill: 1.5 inches
### Dimensions and installation
- Weight listed: 10.1 ounces
### Materials and protection
- Water resistance listed: Waterproof

## Before you buy

- The listing says surfaces should be clean, debris-free, grease-free, oil-free and dry before application. Tooling and finishing should be completed before the skin forms, typically within an hour. The under-60-minute skin-time claim is approximate.

## In the box

- AP Products Sikaflex-221, white (Included)

## A good fit for

- Buyers needing a white sealant and adhesive for listed roof, vent or pipe applications.
- Projects involving listed metal, plastic, coated-metal or ceramic surfaces, subject to application requirements.

## Less suited to

- Buyers who need a confirmed cure time or application suitability for a surface not identified in the listing.

## Customer feedback

Customer feedback describes the sealant as effective, with RV roofs and vertical walls specifically mentioned. Reports on adhesion and durability are mixed: some customers describe good bonding and lasting seals without cracking or shrinking, while others say dispensing is difficult or mention expiration issues. These experiences matter for roof and wall projects, but they do not establish a specific cause or guarantee performance. The ratings skew positive overall, though a smaller share is unfavorable.
- Positive themes: Customers report effectiveness, including on RV roofs and vertical walls.
- Mixed feedback: Adhesion feedback ranges from good bonding to difficulty getting the sealant out of the tube.
- Mixed feedback: Durability feedback includes reports of lasting seals as well as concerns about expiration issues.

## Frequently asked questions

### What material is Sikaflex-221 listed as?
The listing identifies it as a polyurethane paste and describes it as a one-component urethane sealant and adhesive.
### What preparation does the listing recommend?
It says surfaces should be clean and dry, without debris, dirt, grease, oil or dust. Complete tooling and finishing before the surface skins over, typically within an hour.
### Which surfaces are listed as recommended?
The listed surface recommendation is roof, vent and pipe. The feature text also claims bonding to metals, plastics, metal primers and coatings, and ceramic materials.

## Alternative options

- [4 Pcs Plastic Razor Blade Scraper and 100 Pcs Blades, Remove Label Decal Tool， Forw...](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [SIKA Sikaflex Self-Leveling Sealant, Sandstone, 29 fl oz \| Polyurethane formula, Horizontal concrete expansion joints, Accelerated curing, Durable seal, Easy application](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [\[Black\] Seam Sealer Automotive-Professional Grade High Strength Waterproof Automotive Adhesive for Auto Body Repair, Rust & Leak Prevention-Quick Paintable Sealant for Metal, Plastic -10.5Oz Tube](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [SIKA Sikaflex 1a 20 oz Sausage, Aluminum Gray, 1 Unit, One Component, Elastomeric, Non Sag, Polyurethane Concrete and Masonry Joint Sealant for Vertical and Horizontal Joints](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [Belgrade Parts & Service, Inc. Sikaflex-221 White Adhesive and Sealant 10.1 fl. oz Tubes \(3pk\) 017-90891](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 5 Gallon \| DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [SIKA AP Products 017-90915 Sikaflex-252, White](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [AP Products 017-90892 Sikaflex-221, Aluminum Gray](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [Dicor 501LSB-1 Self-Leveling Lap Sealant, Black, 10.3 Oz, RV Roofing \| HAPS-free; for horizontal surfaces; maintenance & repair; appliance application; sun-ray stabilized; EPDM/TPO/PVC compatible](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [FOGATTI InstaShower 7 RV Tankless Water Heater, Propane On Demand Hot Water \| 3 Door Sizes \(15"x15", 15"x18", 18"x18"\) for Easy RV Retrofit, High Altitude Performance, 12V DC Remote Control, Gen 3](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [Dicor 610SASLW-1 Self-Leveling Ultra Sealant System - 10.1 Oz, White, High Performance, Non-Yellowing, Fast Curing, Durable, Highly Compatible, UV Stabilized](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)
- [XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz \(Single Pack\) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)

## Add-ons

- [SIKA Sikaflex-221 Multi-Purpose Sealant/Adhesive, White, 10.1 fl. oz \| Fills cracks up to 1.5 in, Skin time under 60 minutes,](https://best-deals.pro/visit/sika-sikaflex-221-white-polyurethane-sealant-adhesive)

## Images

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 1](https://best-deals.pro/i/jXzodSvp2XCN4y1P84yh-qREUtL3aQ7AmoetdZz71J0hb2RjGIHHlqjYl6MYi7X6ln5AGb9GQ4MVxWqCPO40_RYCeEP9oF8ExnlordSPPqa-yPsgBt8B-i9D.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 2](https://best-deals.pro/i/OfhZ0wwR6tE0Y1TLV3qlf1SU32b48DnscgRDAs7Br44jjDx6nZOMBzW2YoRDh01uxLvZA3V1la1TCQq1AtuTb28FlMwAgs_SW9FU9REvPm8mlqugRyZYfMcN.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 3](https://best-deals.pro/i/iQ5nJt-bGPl3H4ZVRHaAAbDyWMvLuBkr0dzbreMIVI46KMU6XLsk5L4M6PxweIeCO-7Q75AR7F6zWtxZFOWyR9RM3ABf5DpCOeY_zKdnzj6jkPgmsYRJQHzz.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 4](https://best-deals.pro/i/xGOnm0sUnt7vHFnbr1JkAMrovgchz5E2PYnzhoS0KIvYJLZYQr3yUl6n-BvN6JMZctVF04v7tfp7Jlc7qO8I5LavuSh0V3F3EjxdRLl3DfGbnU0EhLW_So7h.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 5](https://best-deals.pro/i/RFlNadropkwv74J4Q1mnsFsAYbKVBxZISu7JU4QJlb59A_YsmHkQRhkp0ktf0mnIjLdqOq9hkXuSVuTcAUYqLSGVypJo3DN889DXyL4XUv2IbuIbO5j_bv7o.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 6](https://best-deals.pro/i/0Ypu4I-ZToRLwG_ARf9CfCtXnVXut9_tmjj8Fez2i2E4dqdx-jVgqNCyirxYAlKgmJSsfAbXdIpw8icHzc2AuPwX5zRLQZmIBSlJQnN3k1iBeqFpRmSV5ozl.jpg)

![SIKA Sikaflex-221 White Polyurethane Sealant and Adhesive, 10.1 fl oz — 7](https://best-deals.pro/i/Oq_SAU8KU51KnsfHs-_y2g46sMoU8dt6uWm8qTZHij-vBMfc63Q6NFPBmatLFklH0-u_KQE-VwjDvEnM3ktttWbpFtsuxVgdoj9M0Sf6SrRbC7wHFy3PCVOZ.jpg)