Products for window, joint & element insulation:

Delete selection
For all cavities
Fire behaviour: D-s2, d0; CH: RF3
Length-related flow resistance: r = 4.1 kPa s/m²
Perfect for windows, doors and joints
Fire behaviour: D-s2, d0
Joint sound reduction index 58 RSTW dB or ≥ 62(-2;-5) RSW (C;Ctr) dB
For sound decoupling and element joints
Fire behaviour: C-s2, d0
Length-related flow resistance: r = 29.5 kPa s/m²

Window insulation made from sheep's wool | Image: RS product

Window insulation with the joint tape

Fits easily into every joint and corner. At any temperature.

Whether foam or swelling tape - the permanently elastic ISOLENA joint tape naturally solves typical installation problems better.

Simply tight - without curing, without residue: The ISOLENA joint tape is inserted into the joint in a dry and controlled manner.

No swelling with heat, no subsequent cleaning, no cutting out, no risk with unevenly wide joints. Installation remains predictable, the result is permanently elastic, airtight and easy to maintain.

Naturally strong in function

Sheep's wool that can do more

ISOLENA sheep's wool insulation not only impresses with its Excellent thermal and sound insulation valuesbut also due to their natural moisture management and their harmlessness to health. Without any chemicals, but with a lasting effect - for healthy, long-lasting construction projects with real sustainability.

✅ Is water-repellent and stores moisture in the fibre
✅ Insulates effectively against heat and cold all year round
✅ Free from chemical additives or synthetic support fibres
✅ Biocide-free, permanently moth-resistant thanks to Ionic Protect®
Certified by natureplus®, Sentinel, EPD & more

Contact & Advice

The right contact person –

depending on what you're planning.

Whether you are a private client, architect or specialist contractor: choose the path that fits your project. We ensure that you get put through directly to the right person.

Book B2B initial consultation

15 minutes, no-obligation. We will clarify your initial situation with ISOLENA and Silentum and jointly determine the next steps.

Local specialist partner

Our dealers and specialist contractors will advise you personally. With experience, in some cases their own warehouses and the right know-how for ISOLENA and Silentum.

To our consultants

Here you have a direct line to us by email or phone.

Isolena Consultant