Description
Otto Novasil S 33 – The neutral, high temperature industrial silicone
Characteristics
- Neutral-curing 1-component silicone sealant, MEKO-free
- Extraordinary long-term temperature resistance up to +285 °C
- Non-corrosive
Standards and tests
- UL 94 Flame Classification HB, RTI 105 °C, File No. E 176319
Fields of application
- Heating, ventilation and plant construction:
- Sealing of moulded boilers and smoke gas cabinets
- General Industry:
- Elastic bonding and sealing for industrial purposes with a permanent temperature of up to +285 °C
- Elastic bonding and sealing in the motor area
Technical specifications
| Skin-forming time at 23 °C/50 % RH [minutes] | ~ 6 |
| Curing in 24 hours at 23 °C/50 % RH [mm] | ~ 2 |
| Processing temperature from/to [°C] | + 5 / + 40 |
| Viscosity at 23 °C | pasty, stable |
| Density at 23 °C according to ISO 1183-1 [g/cm³ | ~ 1,2 |
| Shore-A-hardness according to ISO 868 | ~ 35 |
| Stress expansion modulus at 100 % according to ISO 37, type 3 [N/mm²] |
~ 0,9 |
| Tensile expansion according to ISO 37, type 3 [%] | ~ 350 |
| Tensile strength according to ISO 37, type 3 [N/mm²] | ~ 2,5 |
| Temperature resistance from/to [°C] | – 40 / + 285 |
Novasil S33, Novasil S-33
Hermann Otto GmbH, Krankenhausstraße 14, 83413 Fridolfing, Deutschland, +49 8684 908-0, [email protected]






Giulia –
It completely solved my problem! Packaging slightly damaged, but the product is excellent. Super fast delivery, thank you. Packaging was slightly damaged, but the product is excellent.
Alexandre –
Simple to install.
Ava –
Surprisingly good quality for the price. Very effective, I noticed a change in just a week. The quality surprised me in a good way.
Angelo C. –
Very easy to use. Highly recommended.
Davide X. –
Simply excellent. Good quality at a fair price. Practical and functional.
Damien –
Everything perfect, thank you. Arrived as promised.
logan23 –
Works great.
Anna A. –
Looks even nicer in real life. Easy to use, no mess at all. The quality pleasantly surprised me. Better than anything else I’ve tried before.
Yann –
Reliable and stable. Satisfied with the quality.
leon88 –
Very easy to use.
Zoé U. –
Looks even nicer in real life. Easy to use, without making a mess.
Anton –
Fast shipping, great service. Everything OK.
Chloé –
Super fast delivery, thank you. I noticed the difference right away! Very effective; I noticed a change in just one week. Great product, worth every cent.
fabian_s –
Very stable. Feels sturdy.