If you’re choosing between Tiger Seal and Sikaflex, you’re probably looking for one product that can handle bonding, sealing, weather resistance, and long-term durability. Both are popular polyurethane adhesive sealants in the UK, widely used in automotive, caravan, construction, and general repair work. But while they seem similar, they are designed with slightly different priorities. In this guide, we compare tiger seal vs sikaflex to help you choose the right product for your application.
What Is Tiger Seal?
Tiger Seal is a polyurethane adhesive sealant made by U-POL, aimed mainly at the automotive aftermarket.
It is commonly used for:
- Body panel bonding
- Automotive trim installation
- Seam sealing
- General workshop repairs
Sealants4All does not sell Tiger Seal. For its cure times, paintability and weather resistance, check U-POL’s current data sheet.
What Is Sikaflex?
Sikaflex is Sika’s range of adhesive sealants used in transport, construction and industrial work.
The most commonly compared products are:
- Sikaflex 221 – multi-purpose polyurethane adhesive/sealant
- Sikaflex 522 – STP sealant/adhesive with high weathering and mould resistance
Sikaflex 221 is a multi-purpose 1-component polyurethane adhesive/sealant that bonds to metals, plastics, ceramics, and painted surfaces while remaining permanently elastic.
Typical uses include:
- Caravans and motorhomes
- Vehicle sealing
- Construction joints
- General bonding and sealing
Sikaflex 221 Strong Adhesive Sealant – Multi-Purpose Application – Black – 300ml
Sikaflex 221 is a high-quality multi-purpose 1-component polyurethane adhesive / sealant that cures on exposure to atmospheric humidity. It is suitable for internal sealing and simple bonding applications.
Expiry Date: 12/2026
Available on back-order
Tiger Seal vs Sikaflex 221: Key Differences
Sealants4All does not sell Tiger Seal and holds no verified data sheet values for it, so the table lists only the Sika figures. Check U-POL’s current data sheet for Tiger Seal.
| Product | Skin time (23 °C / 50 % r.h.) | Application temperature | Service temperature (long-term) | Shelf life (below 25 °C) | Source |
|---|---|---|---|---|---|
| Sikaflex 221 300ml | 60 minutes | 5 °C to 40 °C | -50 °C to 90 °C | 12 months | Sikaflex-221 PDS v05.01 (03-2026) |
| Sikaflex 522 Caravan Sealant & Adhesive 300ml | 30 minutes | 5 °C to 40 °C | -50 °C to 90 °C | 12 months (cartridge) | Sikaflex-522 PDS v07.01 (10-2025) |
| Sikaflex 252 600ml | 40 minutes (open time 35 minutes) | 10 °C to 35 °C | -40 °C to 90 °C | 12 months | Sikaflex-252 PDS v03.01 (04-2023) |
| Tiger Seal (U-POL) | see U-POL’s data sheet | not verified here | |||
None of these Sika data sheets gives full cure as a single figure; our guide on how long Sikaflex takes to dry explains skin time and full cure.
Choose Tiger Seal If You Need:
- Fast grab for automotive panels
- Vehicle body repair work
- Strong bonding for trims and metalwork
- Workshop or garage repairs
Tiger Seal is aimed at automotive body and workshop repairs.
Choose Sikaflex 221 If You Need:
- Multi-purpose sealing and bonding
- Caravan or campervan sealing
- Flexible external joints
- Bonding to metals, metal primers and 2-component paint coatings, ceramic materials and plastics (Sika data sheet)
Sikaflex 522 vs Tiger Seal
If outdoor weather resistance matters, sikaflex 522 vs tiger seal is a more relevant comparison.
Sikaflex 522 is based on Sika’s STP (silane terminated polymer) technology rather than traditional polyurethane.
What Sika states for Sikaflex 522 (PDS v07.01, 10-2025):
- High weathering and mould resistance
- Low emission
- Suitable for interior and exterior elastic sealing and bonding
Typical caravan jobs for Sikaflex 522:
- Caravan roof fittings
- Awning rails
- Solar panel cable entries
- Motorhome sealing
For caravan joints that stay exposed outdoors, its weathering resistance is the reason to choose Sikaflex 522.
What About CT1 vs Sikaflex?
Users often compare CT1 vs Sikaflex as well.
In simple terms:
- CT1: hybrid polymer adhesive sealant for general building and repair work
- Sikaflex: a range with separate products for specific jobs, such as 221, 252 and 522
For caravan sealing, our CT1 vs Sikaflex 522 guide compares the two in detail.
Typical Applications
Automotive & Bodywork
Typical choice: Tiger Seal
- Body panels
- Metal trims
- Workshop repairs
Caravans & Campervans
Typical choice: Sikaflex
- Windows
- Roof lights
- Awning rails
- External seals
- Panel and bracket bonding: Sikaflex 252 600ml, which Sika designed for bonding large components in vehicle assembly and for assemblies subject to dynamic stresses (see Sikaflex 252 vs 522)
Outdoor Weather Exposure
Typical choice: Sikaflex 522
General DIY & Construction
Typical choice: depends on the project
- Bonding only: Tiger Seal works well
- Bonding + sealing: a Sikaflex sealant/adhesive such as 221 or 522
Why Buy Sealants from Sealants4All?
- Official distributor of Sika, Soudal, Everbuild, Fischer, Terraco, and S4 AllPro
- Professional-grade sealants and adhesives
- Wide product range for automotive, caravan, and construction use
Frequently Asked Questions
Is Tiger Seal stronger than Sikaflex?
We have no verified strength data for Tiger Seal, so we cannot compare bond strength. Within the Sikaflex range, Sika designed Sikaflex 252 for bonding large components subject to dynamic stresses.
Which Sikaflex suits caravans?
Sikaflex 522 is the caravan sealant and adhesive in our range, Sikaflex 221 is a multi-purpose option, and Sikaflex 252 is for bonding panels and brackets. Our Sikaflex 522 vs Sikaflex 221 guide explains the difference between the first two.
Can Tiger Seal be used outdoors?
Check U-POL’s data sheet for Tiger Seal’s exterior use. For caravan joints that stay exposed, Sika gives Sikaflex 522 high weathering resistance (Sika PDS v07.01, 10-2025).
What is the difference between Tiger Seal and Sikaflex 221?
Tiger Seal is more automotive-focused, while Sikaflex 221 is a broader multi-purpose polyurethane sealant.
CT1 or Sikaflex: which should you use?
CT1 is a general-purpose hybrid adhesive sealant, while Sikaflex offers separate products for specific jobs.
When comparing tiger seal vs sikaflex, neither is universally better: the right choice depends on the job. Tiger Seal is aimed at automotive bodywork; for caravans and outdoor sealing, Sikaflex 522, 221 and 252 each cover a specific job.
Explore the caravan sealants range at Sealants4All, or shop all sealants and adhesives.
