SELITAC® 5 mm AquaStop

Premium underlay with excellent thermal insulation
Excellent sound insulation values, high load-bearing capacity, efficient thermal insulation – the SELITAC® 5 mm AquaStop is top of the range in every respect. To ensure that it does absolutely everything, this product also has an integrated vapour barrier to protect against rising moisture and even out areas of unevenness of up to 4 mm.

Polystyrene foam with high level of compressive strength – ideal for cold floors

Optimal compensation for areas of unevenness
Impact and walking sound insulation
Excellent thermal insulation

Order number	70661
Thickness	5 mm
Dimensions	0.8 x 6.25 m
Package contents	5 m²

Why SELITAC® 5 mm AquaStop

Easy to process

Easy to install
as a folding panel

Secure connection
with click system

Easy to cut
due to printed grid

Protects the floor from damage

Protection against
loads and use

Protection against
falling objects

Protection against
rising moisture

Protection in
uneven areas

Increases living comfort

Reduction of
walking sound

Reduction of
impact sound

Thermal insulation
for cold floors

Installing SELITAC® 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

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

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

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

Step 4
To protect the wall connection area from moisture, ensure that you also mask the area with SELITstop® Aluminium-Foil Sealing Tape. To do this, stick approx. 3 cm of the aluminium tape to the wall and the rest to the underlay at a right angle.

Installing the flooring

Step 5
Lay the flooring in the same orientation as the underlay. Do not place any load on the underlay. If necessary, place the board under your knees/feet to distribute the load.

Finishing the installation

Step 6
Repeat steps 2 – 5 until the entire floor has been installed. Connect the individual panels of the underlay using the easy click® contour. Seal all joints with the Aluminium-Foil Sealing Tape to make them vapour-tight.

Technical data (according to EN 16354)

Punctual conformability (PC)	up to 4 mm
Compressive strength (CS)	≥ 90 kPa
Compressive creep (CC)	≥ 25 kPa
Dynamic load (DL₂₅)	≥ 250,000 cycles
Resistance to large ball (RLB)	≥ 140 cm
Water vapour diffusion resistance (SD)	≥ 100 m
Thermal resistance (R)	∼ 0.15 m²K/W
Impact sound reduction (IS)	up to 22 dB
Reaction to fire (RTF)	E_fl
*Suitability for underfloor heating	No