Polymeric, extrudable, hydro -expansive sealant in cartridge

Code: PRS.0047

Components: 1

Appearance: Cartridge

Hydro-expansive sealant, in thixotropic paste, pre-packaged in extrudable cartridge with normal dosing guns, to use as waterstop in the most difficult or uncomfortable situations in the context of the waterproofing underground premises. It keeps its elastic and sealing properties unchanged in time.

Linee di appartenenza

General characteristics


Density: 1.35 kg/dm³




Shelf-life: 9 months


Use wearing protective gloves



Technical specifications

24 hour expansion capability

+25 %

Breaking load longitudinal

3.5 MPa

Dust-free time

3-5 h

Expansion capacity to 7 days

+100 %

Hard to touch

10 h


45 _

Available colours

- Red

Packaging and dimensions

- Cartridge 300 cc

- Box: 12 x (Cartridge 300 cc)


From 0.15 to 0.30 cartridges of FLEXSEAL 300 for each linear metre to be sealed, depending on the geometry of the cavity.

Use fields

Formation of airtight seals at connections, holes, cavities, cracking, formwork blades etc.; execution of seals in the connection between pipes and masonry; Material to assist in laying both traditional and hydro-expansive waterstop profiles.

Preparation of supports

The application surfaces should be clean, free of incrustations, crumbling and non-adhering parts, dust etc.

Use method

Cut the tip of the cartridge with a cutter so as to allow the extrusion of a sealant kerb of at least 8 mm in diameter (to ensure that the sealing is both efficient and hydro-expansive). FLEXSEAL 300 must be placed laid in properly confined sections and covered with at least 6 cm of structural, shrink-resistant mortar GROUT 6 (castable) or REPAR TIX (thixotropic).

Application methods

- Dispensing gun

- Spatula

Tool cleaning

- Nitro thinner

Permitted supports

- Concrete

- Prefabricated concrete

- Wood

- Plastic

- Fiber-cement

- Floor screed

- Steel

Warnings, precautions and Ecology

Do not use FLEXSEAL 300 as a simple silicone. Totally unconfined expansion would detach it from the support, thus making the sealing redundant.

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