Waterstop in hydro-expanding rubber, 20x5 mm section

Code: PRS.0244

Components: 1

Appearance: Stripe

Hydro-expanding waterstop sealant with a special mix of natural and synthetic rubbers and hydrophilic agents: in contact with water, it increases up to triple its volume compared to the original size. SEALGUM 20.05 is a simple waterstop easy to use, not requiring particular preparation on the supports, pre-shaped compartments, etc..

Linee di appartenenza

General characteristics


Shelf-life: 12 months


Density: 1.26 kg/dm³


Hydroexpansive product: +514 %

Technical specifications

Surface section

100 mm²

Unit weight

131 g/m

Resistance to water pressure

5 bar

Fire resistance

B 2 _


36 _

Available colours

- Blue

Packaging and dimensions

- Roll 10 m

- Box: 5 x (Roll 10 m)


1.1 m/m: Use 1 metre of SEALGUM 20.05 for each linear metre, being careful to place 5-10 cm of the product alongside the end/start roll points to guarantee the permanent water tightness of the system.

Use fields

Creation of castings and connections with safe and permanent hydraulic hold.

Preparation of supports

Take care to create the laying site of the waterstop as smooth and even as possible. Remove any flaking, inconsistent, dusty, etc. parts.

Use method

SEALGUM 20.05 must be spread on the laying surface and fastened using nails (steel nails plus water approx. every 25 cm). Sealing of the joints is ensured by simple placement side by side and not overlapping the ends. Positioning must guarantee good coverage of 10-12 cm by the concrete, to contain the expansive action generated by hydration.

For particularly disconnected or rough surfaces, you can position SEALGUM 20.05 with the help of a hydro-expanding sealant in a cartridge FLEXSEAL 300.

Application methods

- Apply by hand

- Hammer

Permitted supports

- Concrete

- Cement-based or lime-based mortars

- Prefabricated concrete

- Rock walls

Warnings, precautions and Ecology

If there is aggressive groundwater or with high saline content, ask for the specific version for this type of application SEALGUM 20.5 SW.


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