Last updated: 12 January 2026
You invested in a sauna for total relaxation. But if things don't feel quite right, it's usually down to one of these common headaches:
🔥 Melting or warping – Ordinary PVC just can’t hack it above 75°C. It softens, twists, or leaves a sticky mess behind.
💨 Escaping steam – A dodgy seal drops the temperature and can hike up your energy bills by 30%.
⚠️ Heads up: Standard shower seals are PVC and won't work in a sauna. You need our high-heat TPE seals.
At SIMBA, we provide pro-grade solutions that:
- ✅ Handle 180°C+ continuous heat with ease
- ✅ Never melt or give off nasty fumes
- ✅ Keep the heat in and the bills down
1. Why standard seals melt (The hard truth)
Most bathroom seals are made of PVC, which is a big "no" for saunas.
| Material | Max Temp | What happens? | Risk |
|---|---|---|---|
| Standard PVC | 65–70°C | Warps and sags | Toxic fumes & leaks |
| SIMBA TPE | 180–200°C | Stays spot on | Safe & Efficient |
Expert tip from Laura: TPE has that rubbery flex but handles serious heat. If a seller doesn't mention a specific heat rating for a sauna seal, walk away!
2. How to seal your sauna door
Fit & Function
Just like standard doors, you'll need side seals and bottom seals. Simply pick based on your glass thickness.
Go TPE, Not PVC
We only recommend TPE. It stays flexible and handles extreme heat without losing its grip or performance over time.
Where to buy a proper sauna door seal?
Let’s be honest—finding a decent sauna glass seal can be a faff. We’re currently finalising our new universal range:
Cheeky Pre-Order Bonus! 🎁
Our pro-grade TPE seals officially land in the UK in late February. If you pre-order before 28th February, we’ll give you a "Buy 1, Get 2" deal on the house.
Buy 1 strip, get another one absolutely free.
Simply register your interest with your name and email. It’s a proper doddle—we’ll sort the rest and ship your double-order the moment they arrive.
Expected Price: £64 | Length: 2000mm | Gap Fit: 1-35mm
4. Your Questions Answered
What's the best thing to seal a sauna? +
Is a gap under the door okay? +
Do I really need a seal? +
Upgrade to a pure sauna experience
Contact us to reserve your TPE seals:
Email: info@showerdoorseal.uk
WhatsApp: +44 7352 644608
Free UK delivery & 30-day returns as standard.