HD 1.5 mm AquaStop

Thin underlay with integrated vapour barrier
Low installation heights and high requirements do go together. The SELITPRO® HD 1.5 mm AquaStop proves this. Despite its low thickness, it also protects your floor from high loads. Also impressive: the significant reduction in walking sound. To prevent residual moisture from causing damage, the SELITPRO® HD 1.5 has an integrated vapour barrier. It is also suitable for vinyl floors.

Heavy-duty film with mineral filling - Ideal for underfloor heating

  • High load-bearing capacity
  • Significant decrease in the walking sound
  • Vapour barrier to prevent residual moisture
Order number70695
Thickness1.5 mm
Dimensions1 x 10 m
Package contents10 m² + Tape
Why HD 1.5 mm AquaStop

Easy to process

Easy to cut
due to printed grid

Protects the floor

Protection against
loads and use

Protection against
rising moisture

Protection in
uneven areas

Increases living comfort

Suitability for
underfloor heating*

Reduction of
walking sound

Reduction of
impact sound

Installing HD 1.5 mm AquaStop –

a step-by-step guide

Before installation, please note: check the base in accordance with CEN/TS 14472 and ensure that the quality of the base is suitable for proper processing. In general, the base should be clean, level, dry, resistant to tension and compression and should not contain any substances such as plasticisers, solvents or other diffusing substances. It must be ensured that the base is in a state of equilibrium humidity and that the CM value is below 2.0 % (for cement screed) or below 0.5 % (for anhydrite screed and anhydrite flowing screed). The processing instructions of the flooring manufacturer are to be observed as binding specifications.

Cleaning the surface

Cleaning the surface

Step 1
Clean the surface thoroughly with a brush or vacuum cleaner. Remove any adhesive and paint residues completely.

Laying out the first panel

Laying out the first panel

Step 2
Lay the first panel of the underlay flush with the wall over the entire width of the room. Make sure that the aluminium side is at the top.

Masking joints

Masking joints

Step 3
To protect against moisture, seal possible joints with SELITstop® Aluminium-Foil Sealing Tape to make the joints vapour-tight.

Masking the wall connection area

Masking the wall connection area

Step 4
To protect the wall connection area from moisture, we recommend the pre-notched SELITstop® Moulding Protection Belt.

Installing the laminate

Installing the laminate

Step 5
Lay the laminate in the same orientation as the underlay. Observe the manufacturer’s instructions and do not place any load on the underlay. If necessary, place the laminate board under your knees/feet to distribute the load.

Finishing the installation

Finishing the installation

Step 6
Repeat steps 2 – 5 until the entire floor has been installed. Tape the joints with the Aluminium-Foil Sealing Tape to make them vapour-tight.

Technical data (according to EN 16354)
Punctual conformability (PC)up to 0.5 mm
Compressive strength (CS)≥ 400 kPa
Compressive creep (CC)≥ 25 kPa
Dynamic load (DL25)≥ 250,000 cycles
Resistance to large ball (RLB)≥ 30 cm
Water vapour diffusion resistance (SD)≥ 100 m
Thermal resistance (R)~ 0.010 m²K/W
Impact sound reduction (IS)Laminate up to 16 dB | Vinyl up to 13 dB
Reaction to fire (RTF)Efl
*Suitability for underfloor heatingYes, if flooring R ≤ 0,14 m²K/W (e.g. laminate up to approx. 12 mm, wood flooring up to approx. 14 mm)

Meets the minimum requirements of the EPLF and MMFA (Group 1)


SELITPRO HD 1,5 mm AquaStop Produktinformationsblatt
Size: 1,8 MB
Catalogue 2020
Size: 5.2 MB
Excellent quality
Made in Germany.

Emissions-tested: A+

In accordance with the French VOC regulations, our underlays achieve the lowest emission values and therefore feature the A+ mark.
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Approved by the building authorities

Stay on the safe side with SELIT: all our underlays are approved by the building authorities.
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