Innerseal range
Two sizes. Both permanent.
The same product, in two sizes. Pick the one that fits your project.
Innerseal 5L
£89Covers up to 15m² · Most popular for one-off projects
- ✓ Patios, garage floors, basements
- ✓ Chimneys, foundations, walls
- ✓ Free UK delivery (Royal Mail / DPD)
- ✓ In stock — same-day dispatch before 12pm
Innerseal 20L
£289Covers up to 60m² · Saves £67 vs 4 × 5L
- ✓ Large patios, double garages, full basements
- ✓ Same product, same chemistry, same lifespan
- ✓ Free UK delivery (Royal Mail / DPD)
- ✓ Trade pricing available — email us
Which size do I need?
As a rule of thumb, 1 litre covers about 3m² across two coats. Add a little extra for very porous or old concrete.
| Surface area | What you need | Price |
|---|---|---|
| Up to 15m² | 1 × 5L | £89 |
| 30m² | 2 × 5L | £178 |
| 45m² | 3 × 5L | £267 |
| 60m² | 1 × 20L (saves £67) | £289 |
| 180m² or more | 3+ × 20L | Ask for trade pricing |
Not sure? Email us with the size of your project and we'll tell you the answer in a few hours.
Free UK delivery
Royal Mail or DPD. Same working day dispatch on orders before 12pm.
Certified to EN 1504-2
European standard for long-term concrete protection. Independently tested.
Permanent, not patching
One application. No reapplication needed for 30+ years. No film to peel.
Real support
Email photos of your project — typical reply within 2 hours during UK working days.
Independently tested by
TÜV Rheinland · Technische Universität München · IMASA · CBI Betonginstitutet · Aqualogy · ECO Institut