soudal_145789

SOUDAL Soudatight SP air- and vapour-tight membrane white 11 kg - 145789

Supplier number: SOUDAL 145789 | EAN 5411183161276
Recommended Retail Price €141.31
121.40 tax incl.
€100.33 excl. VAT (incl. all environmental contributions)
On order: delivered from 17/10/2026

  • Delivery by DHL

Airtight performance with Soudatight SP

Practical benefits
  • Seamless vapour retardant seal: Once dry, this liquid paste creates a continuous elastic membrane, ensuring you stop unwanted air leakage and moisture infiltration effectively.
  • Fast sprayable surface application: You can spray the compound quickly onto large surface areas using airless equipment, saving considerable time during building installations.
  • Ready for subsequent finishing: The fully cured membrane accepts plaster, paint, and tape directly, allowing you to complete your wall finishes without delay.

In a nutshell

The right choise for

With the Soudal Soudatight sp sealing coating, you create a dependable airtight and vapour-tight barrier across indoor building junctions. This liquid paste is designed for fast spray application using airless equipment on large wall areas, floor-to-wall transitions, ceilings, and window reveals. It eliminates drafts, heat loss, and moisture risks without the need for cutting and taping conventional foils. Adhering securely to porous, slightly dusty, or damp substrates, it dries into a seamless, flexible white membrane. Once fully cured, the surface can be plastered, painted, or taped over directly, allowing you to move smoothly into the next phase of your build or renovation.



€121.40
tax incl.

Product information

Key features according to our expert

  • Weight: 1 kg
  • ADR packing group: Not applicable
  • UN number: Not applicable
  • ADR class: Not applicable
  • EUH-statements: EUH208; EUH210
  • Physical state: Liquid

Product description:

  • Soudatight SP is the sprayable version of Soudatight LQ, only the glass fibres are logically omitted. This product can be very easily and quickly sprayed to form a liquid, air- and vapour-tight membrane on larger surfaces and on the connections between these surfaces (floor-wall, wall-ceiling, etc.). Forms a seamless elastic membrane after drying, which is an ideal base for painting or plastering. Best used in combination with Soudatight LQ for optimum results. Soudatight SP is applied using airless spray equipment.

Properties:

  • Air- and vapour-tight
  • Very good adhesion to many porous materials
  • Good adhesion on slightly damp substrates
  • Permanently elastic after curing and very durable
  • Can be painted over and plastered after drying
  • Complies with GEV-EMICODE EC-1 PLUS: very low emission

Applications:

  • For air- and vapour-tight finishing of window connections, wall-floor connections, wall-ceiling connections and surfaces (no roof applications).

Instructions for use:

  • Make sure that Soudatight SP is at room temperature before use. Shake or stir well before use. Soudatight SP is applied to the substrate using airless or air-assisted spraying equipment directly from the packaging. The choice of spraying equipment, pressure, gun and spray tip depends on the application. Contact Soudal for further tailor-made information. Apply the air sealing paste undiluted and evenly in several layers (at least 2) to the substrate to a layer thickness of minimum 1 mm and maximum 3 mm. For best coverage, apply the product at a different angle the second time. It is recommended to apply the 2nd coat only after skin formation occurs with the first coat. The application thickness should be measured (wet) using a thickness gauge. For window applications ensure that the airtightness paste forms a seamless membrane of at least 3 mm on the window frame, over the flexible foam up to ± 5 cm on the day side of the building shell. The use of masking tape (on the window frame) is recommended. However, this should be removed shortly after application of Soudatight SP, before curing. For wall connections, ensure that the airtightness paste forms a seamless membrane of ± 15 cm on both surfaces. Before curing, Soudatight SP can be removed from materials and tools with water.
Supplemental hazard information
  • EUH208: Contains ... (see safety data sheet). May produce an allergic reaction.
  • EUH210: Safety data sheet available on request.

All Features

Weight
1 kg
Adr packing group
Not applicable
Un number
Not applicable
Adr class
Not applicable
Euh-statements
EUH208; EUH210
Physical state
Liquid
Colour
white
Packaging form
Bucket
Product content
11 kg
  • Brand SOUDAL
  • EAN 5411183161276
  • Supplier number SOUDAL 145789

Frequently asked questions about this product

Answered by specialists
What is Soudatight SP used for?
You use this sprayable membrane to create an airtight and vapour-tight seal on floor-wall, wall-ceiling, and window connections.
How do you apply this sealing coating?
You apply the product undiluted using airless spraying equipment in at least 2 coats to a total thickness of 1 mm to 3 mm.
Can Soudatight SP be applied to slightly damp surfaces?
Yes, it adheres reliably to most porous building surfaces as well as slightly damp or dusty substrates.
Can you plaster or paint over the coating?
Yes, once fully cured and dried, the elastic membrane provides a suitable base for painting, plastering, or taping.
How do you clean tools after application?
Before the product cures, you can clean your spraying equipment and tools easily using water.
Questions about this product?

Our product specialists are happy to help with any questions about this range. Call, email or chat with us!

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