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Ottoseal S730 for RAL installation, exterior white 310ml

Description

OTTOSEAL® S 730 is a high-quality, neutral-curing 1K silicone sealant for driving-rain-tight and vapour-permeable exterior sealing. It was developed specifically for RAL installation and offers durable, weather-resistant joints outdoors.

Benefits & properties

  • ✔ Neutral-curing oxime system – MEKO-free
  • ✔ Driving-rain-tight & vapour-permeable in line with RAL installation
  • ✔ Very high weather, UV and ageing resistance
  • ✔ Fungicidally treated – safe against mould
  • ✔ Non-corrosive & paint-compatible according to DIN 52452

Areas of application

  • Exterior sealing of connection joints between window and building structure
  • Driving-rain-tight and vapour-permeable sealing in RAL installation
  • Ideal for construction, the trades and professional window installation
  • Alternative to standard silicones where higher weather and diffusion requirements apply

Detailed product description

OTTOSEAL® S 730 is based on a neutral-curing oxime system and is completely MEKO-free. The high water vapour permeability enables professional exterior sealing in line with RAL guidelines. Thanks to its excellent UV, weather and ageing resistance, the joint stays stable in the long term. The sealant is fungicidally formulated, non-corrosive and ideally suited to demanding building connection joints.

Application tips: Clean and dry the substrate and prime if necessary. Apply the cartridge evenly, smooth the joint and make sure there is sufficient backing material. Apply only within the recommended temperature range.

Technical data

PropertyValue
ColourWhite, grey and other variants
Container size310 ml cartridge
CuringNeutral-curing (oxime), MEKO-free
Water vapour permeabilityVery high
Weather resistanceVery good
UV resistanceVery good
Mould resistanceFungicidally treated
Application temperature+5 °C to +35 °C (typical for silicone; observe manufacturer's information)
Shelf lifeApprox. 12 months (cool & dry)
Certificates / standardsCompliant with RAL installation, DIN 52452 (paint-compatible)

Technical data

Material: Silicone
Version
Colour: white
Technical data
Contents: 310 ml
Product group: Construction silicone & window silicone
Standards
Standard: DIN 52452
Use
Merchandise group: Sealants
Application
Application temperature: +5 °C to +35 °C

Data sheets

Manufacturer information

Manufacturer information pursuant to Art. 19 EU GPSR

Postal address Hermann Otto GmbH
Krankenhausstr. 14
83413 Fridolfing
Germany

Electronic address info@otto-chemie.de

All products by OTTO Chemie

Information as of: 2026-09-17

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For your project

These products go with it

Project: Seal windows and doors to RAL guidelines

Execute the connection joint in three layers: airtight inside (acrylic A710 or interior tape), insulated in the middle (assembly foam or multifunctional tape), driving-rain-tight and vapour-permeable outside (S730 or exterior membrane). Inside must always be tighter than outside.

  1. Prepare the surface

  2. Apply

    • Part of the system Insulates the middle layer; can only be applied with a foam gun
      €11.95 €15.93 / 1 Litre
    • Alternative One tape for all three layers – then without A710 and S730
      €23.29 €2.91 / 1 Metre
    • Alternative One tape for all three layers – then without A710 and S730. Choose the tape dimension according to window installation depth and joint width
      €23.99 €6.00 / 1 Metre
    • Alternative Narrow version (joint 4–30 mm) only for the lower connection – instead of the wide tape, not in addition. Choose the dimension according to the measured joint width
      €13.49 €3.37 / 1 Metre
  3. Seal & join

  4. Tools & accessories

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