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Sto Rend Flex System

Sto Ltd

A specialist anti-crack render system. A render system for application onto existing flat substrates comprising cement free reinforcing coat and glass fibre reinforcing mesh, suitable to accept a wide range of low maintenance facade finishes offering exceptional levels of weather protection.

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+44 (0)141 892 8000 www.sto.co.uk
Description

A specialist anti-crack render system for use on existing rendered surfaces or external wallboards. It is particularly recommended for use with the Verotec Futur® Ventilated Façade System (specified separately). The system comprises of Sto-Elasto a fibre reinforced, factory batched cement free reinforcing coat, with Sto glass fibre mesh reinforcement embedded to provide additional crack resistance. Sto Rend Flex can bridge existing cracks and board joints without the risk of cracking.

StoRend Flex is a thin coat render system offering exceptional crack resistance that is suitable for application onto existing flat surfaces and is especially suited to use onto either StoVentec render carrier board as part of a StoVentec R rainscreen façade system or onto Sto-Reno Plan board as part of the StoReno system, and can be finished with a range of Sto render finishes, StoBrick, Sto-Resin Brick Slips, Sto-Ecoshapes or enhanced with StoDeco Profiles or StoDeco Rustications. Sto through coloured render finishes are available in a variety of textures and grain sizes, and up to 1100 colours from the StoColor system and StoDesign Architectural Colour Range.

General information
Specification data - Multicoat render systems
Product Reference

Sto Rend Flex

Substrate -
Type

Glazed/ Ceramic tiles/ bricks

Existing flat/ true substrates

Sto Reno Plan board

As part of the StoReno system.

StoVentec render carrier board

Fixed to suitable support framing or as part of a StoVentec R rainscreen system.

Substrate preparation

StoPrim Fungal

Disinfectant for treatment of algae/ fungal growth.

StoPrim Micro

Deep penetrating, adhesion promoting, surface consolidating, absorption regulating primer typically suited to application in large areas.

StoPlex W

Adhesion promoting, surface consolidating, absorption regulating primer suited to application in small to medium areas.

StoPrep Contact

Bonding bridge for use on surfaces that are smooth and/ or of very low absorption.

Reinforcing coat

StoArmat Classic Plus cement-free reinforcing render

Reinforcing mesh

Sto Glass Fibre Mesh

Decorative finish render -
Type

Stolit Effect

Acrylic resin bound render finish used to achieve special render effects.

Stolit K

Acrylic resin bound render with stippled texture.

Stolit Milano

Acrylic resin bound render finish with fine grain used either alone or with Stolit K/ Stolit Effect to achieve special render effects.

Stolit MP

Acrylic resin bound render with rustic texture.

Stolit R

Acrylic resin bound render with rilled texture.

StoLotusan K

Super-hydrophobic render finish with stippled texture and Lotus Effect.

StoLotusan MP

Super-hydrophobic render finish with rustic texture and Lotus Effect.

StoSilco K

Silicone resin bound hydrophobic render with stippled texture.

StoSilco MP

Silicone resin bound hydrophobic render with rustic texture.

StoSilco R

Silicone resin bound hydrophobic render with rilled texture.

StoSuperlit K

Acrylic bound render finish with exposed natural stone aggregate.

Colour/ Aggregate:

See 'Options' and insert requirement.

Accessories

None

Sto-Stop Bead PVC-U

Sto-PVC Mesh Angle Bead

For reinforcing 90° external angles.

Sto-Mesh Angle Flexibead Ideal

For reinforcing external angles.

Sto-Armour Angle

For reinforcing internal angles.

Sto-Seal Bead Standard

Combined render stop bead and reinforcing mesh for use at head/ reveal interfaces.

Product Options

Substrate:

- Preparation:

  • StoPrim Fungal: A fungicidal wash used where algae or fungus are present.
  • StoPrim Micro: Deeply penetrating, siloxane based primer supplied as a concentrate for dilution with clean water, which forms a water-repellent layer in the substrate and reduces the absorbency of porous surfaces and aids surface consolidation.
  • StoPlex W: Siloxane modified all-purpose primer on an acrylate base used to promote adhesion and regulate absorbency of porous surfaces.
  • StoPrep Contact: Acrylic based adhesion intermediary for siliconized bricks, ceramic tiles or other smooth or low absorbency backgrounds.

Reinforcing coat:

StoArmat Classic Plus cement-free reinforcing render: Water based, fibre reinforced, highly flexible acrylic mesh coat. Minimum thickness 3.0 mm; thickness to be such as to ensure the reinforcing mesh is fully embedded.

Decorative finish render:

Render finishes are available in a range of up to 800 colours from the StoColor System and a further 300 colours from the Sto Architectural colours range.

Other finishes: StoBrick clay brick slips, Sto Resin Brick Slips, Sto-EcoShapes, StoDeco Profiles, StoDeco Rustications, plus other options may be used as an alternative to or in conjunction with render finishes - consult manufacturer for details.

- Colour/ Aggregate:

Refer to StoColor system and Sto Architectural colour range for colours. Consult manufacturer for details and samples.

  • Stolit: 1.5, 2, 3 and 6 mm grain size.
  • StoSilco and StoLotusan: 1.5, 2 and 3 mm grain size.
  • StoSuperlit: 2 mm grain size.

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