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Ottoseal M390 floor sealant

Description

The silicone-free floor sealant OTTOSEAL M 390 is a real all-rounder in the flooring sector because, despite its high elasticity and good workability, in the cured state it forms a robust and highly resilient surface that withstands not only mechanical but also chemical stresses. This makes it ideally suited to expansion and connection joints with various floor coverings. In addition, the sealant can be sanded and painted over after curing, and it holds the ISEGA declaration of no objection for the area close to food.

  • Very high notch resistance and tear propagation resistance
  • Withstands high mechanical loads
  • Good chemical resistance
  • Can be used in areas with heavy chemical exposure
  • Very good adhesion on many materials
  • Can be used on many materials without pre-treatment
  • Cures practically without shrinkage
  • No reworking and no cove joints that tend to get dirty
  • Extremely elastic
  • Compensates for movement
  • Low odour
  • Pleasant to work with
  • Silicone-free
  • No interactions with commercially available parquet coatings
  • Isocyanate-free
  • Good weather and ageing resistance
  • For long-lasting applications indoors and outdoors
  • Can be sanded and painted over after curing
  • Visually flawless joint adaptation

Areas of application:

  • Sealing joints in parquet, laminate, wood, cork, plastic and vinyl floors
  • Sealing mechanically heavily loaded movement and connection joints exposed to static loads or rolling traffic, in e.g. warehouses and production halls, workshops, yard areas, car washes, parking decks, underground garages etc.
  • Sealing floor and connection joints subject to high chemical loads, e.g. in dairies, slaughterhouses, beverage and food factories, catering kitchens etc.
  • Stress-compensating sealing of floor and connection joints indoors and outdoors on pedestrian walkways, balconies, terraces and public areas
  • Sealing movement joints between concrete slabs

Pre-treatment:

Preparing the bonding surfaces. Compatibility: paints, varnishes, plastics and other coating materials must be compatible with the adhesive / sealant.

Cleaning: The bonding surfaces must be cleaned and any contamination, such as release agents, preservatives, grease, oil, dust, water, old adhesives / sealants and other substances that impair adhesion, must be removed.

Substrates: cleaner for non-porous. Cleaning should be done with OTTO Cleaner T , or other acetone- or isopropanol-based cleaners and with a clean, lint-free cloth. Cleaner for porous substrates: porous surfaces must be cleaned of loose particles mechanically, e.g. with a steel brush or a grinding disc.

Application:

Application temperature: +5ºC to +35ºC.
Application method: Apply with manual caulking gun, compressed-air gun or cordless gun.
Cleaning: With cleaner before curing, afterwards removable with silicone remover or mechanically.
Smoothing: With  smoothing agent and scraper  before skin formation.  

Storage:

Can be stored cool and dry.

The specific use-by date can be found printed on the container and must be observed. We recommend storing Otto Chemie adhesives and sealants in the unopened original containers dry (< 60 % RH) in a temperature range of + 15° C to + 25° C. If the products are stored and/or transported for longer periods (several weeks) at higher temperature/humidity, a reduction in shelf life or a change in material properties cannot be ruled out.

Supplied as: 

310ml cartridge  (20 cartridges per carton)

Technical data

Material: Hybrid polymer
Version
Colour: white
Technical data
Product group: MS polymer & hybrid sealants
Application
Cleaning: The bonding surfaces must be cleaned and any contamination
What's included
Supplied as: 310 ml cartridge (20 cartridges per box)
Storage
Storage: Can be stored cool and dry

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

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Project: Apply sealant from the cartridge

Cut the cartridge tip off above the thread, screw on the nozzle and cut it at an angle to match the joint width. Insert the cartridge into the manual gun, mask the joint edges, inject evenly and smooth the joint immediately.

  1. Prepare the surface

  2. Tools & accessories

  3. Finish & care

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