Altrofoam SF 50

  • Altrofoam SF 50

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  • Article code: S11596

✔ Flexible foam
✔ Brownish
✔ Up to 20X volume increase
✔ Final density 50 kg/m³
✔ Mixing ratio by weight: 100:50

€ 33,61
€ 27,78 Excl. tax

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Product description

Altrofoam SF 50

This flexible polyurethane foam has a low density and is perfect for use as a light filling. This foam can be processed by hand (or machine) and can be poured into unheated cavities or molds.

This is a polyurethane casting system foam consisting of an A and B component with a simple mixing ratio (2:1). The result is a compressible foam.

  • Brownish
  • Can be processed by hand
  • To be used in non-heated moulds
  • Low density
  • Suitable as:
    • end product in industrial applications
    • filling of flexible objects

Technical data

  • Mixing ratio by weight: A:B = 100:50
  • Mixing time at 20°C*: 10 seconds
  • Density cured: 50 kg/m³ (0.05 gram/cm³)
  • Volume increase: 20X

*For 100 grams. Larger quantities and higher temperatures result in a much shorter processing time. Do not process too much material at once!


Stir/shake both components well in their original packaging before use to distribute the fillers evenly. Only process the PU when it is at room temperature (20 to 25°C). Work in a dry room at room temperature. do not use wooden spatulas. Process the product in a room above 20°C.

Pour components A and B together and mix well. Use a mixer with 1000 RPM for best results. Pour the mixed product into the mold with a constant jet, being careful not to entrap any air. Excessive heat development in large castings can be prevented by pouring several successive layers (allow the layer to set before pouring the next one). Wait until the indicated time has elapsed before demoulding. The thermal and mechanical properties will develop rapidly. Final specifications will only be reached after 7 days.


The moisture absorbers in these products may settle, requiring remixing before use. This can be achieved by shaking the packaging intensively before use.
The less filler you add, the greater the heat development of the casting and the less thick you can cast in one go. Use a large surface area mixing bucket to maximize processing time.

The mixing ratio is very important. If there is a deviation of more than 3%, you cannot achieve the specified specifications. Therefore, use a very precise scale (gram scale accurate to 2 points after the decimal point), especially for small quantities.

Shelf life

The polyurethane casting system should be stored in a dry place between 6-28°C. The expiration date, which assumes storage within the specified conditions, is indicated on the packaging. Opened packages must be processed as quickly as possible to ensure product quality. The normal shelf life is 6 months.

Safety regulations

Altropol Polyurethane foam flexible 50 - A component

H-Code hazard statements

H319 Causes serious eye irritation.

P-Code precautions


P264 Wash tools thoroughly after use.

P280 Wear protective gloves/clothing and eye/face protection.


P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. remove contact lenses if possible; keep rinsing.

P337 + P313 If eye irritation persists: Get medical advice/attention.

P501 Dispose of contents/container in accordance with applicable regulations.

Exceptional provisions:

EUH205: Contains isocyanates. May cause an allergic reaction.


Altropol Polyurethane foam flexible 50 - B component

H-Code hazard statements

H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled

H351 Suspected of causing cancer

H373 May cause damage to the lungs and respiratory system

H315 Causes skin irritation

H319 Causes serious eye irritation

H317 May cause allergic skin irritation


P-Code precautions


P273 Avoid release to the environment.

P391 Collect spilled material.

P260 Do not breathe dust/fume/gas/mist/vapour/spray

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection

P284 (If ventilation is inadequate) wear respiratory protection

P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. remove contact lenses if possible; keep rinsing.

P405 Store locked up

P501 Dispose of contents/container in accordance with applicable regulations.

Contains isocyanates. May cause an allergic reaction. By August 24, 2023, appropriate training must be completed for industrial or professional use.

Product contains diphenylmethane-4,4'-diisocyanate (MDI), diphenylmethane-2,4'-diisocyanate (MDI), diphenylmethane diisocyanate isomers and hydroxides, diphenylmethane-2,2'-diisocyanate (MDI), isophthaloy dichloride

Exceptional provisions:

EUH205: Contains isocyanates. May cause an allergic reaction.


Product stored in tightly closed packaging between 15 and 25 o C has a shelf life of at least six months.

Product information

EN - Product information Sheet AltroFoam SF 50.pdf

AltroFoam SF 50 Comp. A_-_(IE).pdf

AltroFoam SF 50 Comp. B_-_(IE).pdf


Specifications for: Altrofoam SF 50

  • Color A Comp. Amber
  • Color B Comp. Amber
  • end Color Amber
  • cured density 1,05 g/cm3
  • viscosity mixture 1400 cPS
  • View all specifications
  • Mixing ratio A/ B 100:50
  • Shore (A) 40
  • Working Time 23 minutes
  • Curing time 18 hours
  • Linear shrinkage<0,1%
  • Advised coating thickness<60 mm

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