Sikaflex 221 Black Strong Adhesive Sealant Sika Car Boat Caravan Motorhome
14-day returns on all eligible orders
Contact us within 14 days of receiving your order to request a return.
Shipping information
Orders are picked, packed and dispatched from our Northampton warehouse.
- Free delivery to mainland UK addresses on orders of £40 or more.
- Orders under £40, and orders to Northern Ireland, have a delivery charge, shown at checkout before you pay.
- You will get an email with your tracking number once your order has shipped.
Full details are in our Shipping Policy.
Returns & warranty
Changed your mind? You can return an online order within 14 days of receiving it. Please contact us first for return instructions, then you have 14 days to send the goods back.
- Items must be unused, complete and in their original condition, with all accessories, instructions and original packaging.
- You arrange and pay for the return postage on change-of-mind returns. We refund the price of the item plus our standard delivery charge.
- Damaged in transit? Let us know within 48 hours of delivery - photos help.
- Faulty or wrong item? Contact us before sending anything back. Faulty goods are covered by your statutory rights.
Your statutory rights are not affected. Full details are in our Refund Policy, or email onlinesales@nn4online.co.uk.
Details
Sikaflex® 221 Black is a high-performance multi-purpose adhesive and sealant trusted throughout the caravan, motorhome, campervan, automotive, and marine industries. Designed to create strong, durable bonds while remaining permanently flexible, it is ideal for a wide range of installation, repair, and sealing applications.
Once cured, Sikaflex 221 forms a tough rubber-like seal with excellent adhesion to many common construction materials including metals, timber, painted surfaces, ceramics, and selected plastics. Its weather-resistant formulation makes it particularly suitable for external applications exposed to vibration, movement, and changing weather conditions.
Popular for fitting solar panels, rooflights, vents, rails, trims, and other vehicle accessories, Sikaflex 221 provides reliable long-term performance without becoming brittle. It can also be sanded and painted once cured, making it a versatile solution for both professional installers and DIY projects.
Features
- High-strength adhesive and sealant
- Fast-setting formula
- Forms a durable rubber-like seal
- Remains permanently flexible after curing
- Excellent adhesion to a wide variety of materials
- Weather and ageing resistant
- Suitable for interior and exterior applications
- Can be sanded after curing
- Can be painted over
- Non-corrosive formulation
- Low odour
- Suitable for caravans, motorhomes, campervans, vehicles, and marine applications
Typical Applications
- Fitting solar panels
- Installing rooflights and vents
- Securing multirails and C-channel rails
- Pop-top roof installations
- General caravan and motorhome repairs
- Bonding trims and accessories
- Marine sealing and bonding applications
- Automotive bodywork repairs
Compatible Materials
- Aluminium
- Steel
- Primed metals
- Timber
- Painted surfaces
- Ceramic materials
- Selected plastics
Specifications
| Brand | Sika |
| Product | Sikaflex® 221 |
| Colour | Black |
| Type | Polyurethane Adhesive & Sealant |
| Cartridge Size | 310ml |
| Cure Type | Moisture Curing |
| Finish | Flexible Rubber-Like Consistency |
| Paintable | Yes |
| Sandable | Yes |
| Suitable For | Caravan, Motorhome, Campervan, Automotive & Marine Use |