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Elastic PU-Foam NBS

Elastic PU-Foam NBS: Flexible PU Foam for Joints That Keep Moving

Window and door frames expand, contract and settle. A rigid foam joint eventually cracks under that movement, and with it goes the insulation value. Elastic PU-Foam NBS is a one-component, moisture-curing flexible PU foam that remains elastic after curing, with a movement capability (MTV) of 37%. The joint follows the adjoining building elements instead of tearing loose, so thermal and acoustic performance is retained over the long term.

Permanently elastic after curing, 37% movement capability
Very low post-expansion: no pressure on frames or profiles
Sound insulation of 50 dB at 1600 Hz (ISO 717-1)
Cuttable after 50–65 minutes, fully cured within 24 hours
Approx. 40 litres of foam from one 750 ml gun-grade can

An Elastic Gun Foam for Window and Door Installation

As a window and door foam, it is made for connection joints around frames and window sills, and for seams, cavities and pipe penetrations exposed to regular movement. Because post-expansion is very low, it behaves like a low expansion foam in narrow joints, while the NBS gun-grade valve gives installers precise, controlled dosing. The cured foam withstands -45 °C to +78 °C. Outdoors, finish the joint with a sealant, membrane or coating, as cured PU foam has limited UV resistance. Adhesion to PE, PTFE and PP is poor.

Looking for a Private Label Producer for Elastic PU-Foam?

Then look no further. We specialise in private label PU foams and produce Elastic PU-Foam NBS under your own brand, ready for your customers’ job sites and shelves. As an experienced polyurethane foam manufacturer, we guarantee a constant quality, so your elastic foam performs the same with every order. And we take care of far more than the production:

Can and label design by our own designers, or based on your existing artwork
UFI numbers, CLP-compliant labelling and safety data sheets taken care of
Flexible outer packaging: neutral boxes with your label or fully pre-printed boxes
Also available in lower quantities, ideal for introducing a new article
Quick delivery and a team that speaks your language

BasePolyurethane
CuringMoisture
ApplicationGun grade (NBS)
ColourWhite
Tack-free time at 20 °C6–9 min
Cutting time at 20 °C50–65 min
Fully cured at 20 °C24 hours
Foam yield40 litres
Post-expansionVery low
Tensile strength60 kPa
Adhesion strength80 kPa
Movement capability (MTV)37%
Dimensional stability< 10%
Acoustic insulation (ISO 717-1)50 dB at 1600 Hz
Fire class (DIN 4102)B3
Temperature resistance-45 °C to +78 °C
Application temperature+5 °C to +35 °C
Ideal application temperature+15 °C to +25 °C

Polyurethane, 1K moisture-curing

Elastic PU-Foam NBS

A permanently elastic, gun-grade PU foam for window and door joints that keep moving, available under your own private label.

Remains permanently elastic after curing
Absorbs movement between adjacent building elements
Suitable for dynamic connection joints
Very low post-expansion
Good thermal and acoustic insulation (50 dB)
Good adhesion to most common building materials
Fast cutting time
Easy and precise to dispense with a foam gun

Base PolyurethaneCuring MoistureApplication Gun grade (NBS)Colour WhiteTack-free time at 20 °C 6–9 minCutting time at 20 °C 50–65 minFully cured at 20 °C 24 hoursFoam yield 40 litresPost-expansion Very lowTensile strength 60 kPaAdhesion strength 80 kPaMovement capability (MTV) 37%Dimensional stability < 10%Acoustic insulation (ISO 717-1) 50 dB at 1600 HzFire class (DIN 4102) B3Temperature resistance -45 °C to +78 °CApplication temperature +5 °C to +35 °CIdeal application temperature +15 °C to +25 °C

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