Adhesives and Sealants

Ultramax MS Adhesive Sealant

High-Performance Hybrid Silyl Modified Polymer
Ultramax MS is a one-component adhesive sealant based on Hybrid Silyl Modified Polymers. Combining the strength of polyurethane and the weathering resistance of silicone, this adhesive offers superior bonding for various substrates, ensuring long-lasting performance.

Key Features:

  • High-performance hybrid sealant
  • Combines polyurethane strength with silicone flexibility
  • Quick curing for faster installations

Compressive strength

-

Working time

60 minutes

Thickness

-

Pack size

-

Technical data sheet

PDF

Safety data sheet

PDF

Overview

What is Ultramax MS Adhesive Sealant?

Ultramax MS is a one-component high performance adhesive sealant based on Hybrid Silyl Modified Polymers, designed for timber flooring installation with a built-in moisture vapor barrier and acoustic control. It provides the strength of polyurethane with the weathering resistance and shorter cure times of silicone. The adhesive cures quickly at ambient temperatures and retains excellent bond strength, elasticity and tear resistance over the years.

Where is it used?

  • Timber flooring installation
  • Direct stick of wood flooring to concrete
  • Wood flooring over plywood or particleboard
  • Cement and calcium sulphate screeds
  • Substrates prepared with leveling compound (minimum 2 mm thick)
  • Floors with underfloor heating
  • Moisture seal and vapour barrier beneath timber flooring

Performance

Key product properties

  • Fast curing
  • Built-in moisture barrier
  • Acoustic properties
  • Highly flexible with lasting elasticity and tear resistance
  • Great beading stability
  • Suitable for underfloor heating
  • Primerless adhesion on standard dry substrates
  • Solvent free
  • Easy clean up

Technical Data

Technical specifications

Typical values. Refer to the technical data sheet for full test conditions.
Polymer type Hybrid Silyl Modified Polymer
Consistency Creamy paste
Colour Beige, brown
Density 1.40 g/cm³
Dry solid content 100%
Application temperature +10°C to +35°C
Working time 60 minutes
Adjustability time 1 hour
Coverage 800 to 1000 g/m²
Walk on After 6 to 8 hours
Sanding of floors After 48 hours
Wood to concrete bond strength (7 days) >2.0 N/mm²
Wood to ceramic bond strength (7 days) >1.0 N/mm²
In service temperature -10°C to +70°C
Shelf life 9 months in original packaging

Installation

How Ultramax MS Adhesive Sealant is applied

01

Subfloor preparation

The substrate must be free from cracks and from materials that would impair adhesion such as dirt, oil and grease. Cement and calcium sulphate screeds must be abraded and vacuumed. Remove any adhesion-reducing or unstable layers such as release agents, loose adhesives, compounds and paint residues by brushing, abrading, grinding or shot-blasting, then vacuum thoroughly. Priming is not necessary on standard dry substrates suitable for wood flooring. Any leveling compound below the adhesive must be at least 2 mm thick and fully dry.

02

How to apply

Allow the adhesive to come to room temperature before use. Pull off the foil cover after opening and remove any surface skin without mixing it in. Apply an even coat onto the substrate using a suitable notched trowel: a B3 (3 mm) trowel over plywood or particleboard and a B5 (5 mm) trowel for direct stick to concrete. For moisture seal and vapour barrier use a B5 or 5 mm V-notched trowel and ensure full coverage. Do not apply more adhesive than can be laid within the working time. Place the timber onto the adhesive immediately and press down well. Best applied at 18 to 25°C with floor temperature above 15°C and relative humidity below 65%. Hardened adhesive can only be removed mechanically.

03

System integration

Ultramax MS functions within the complete flooring installation system, bonding wood flooring to substrates prepared with screeds or leveling compound layers. It acts as adhesive, moisture vapor barrier and acoustic layer in one product and needs no primer on standard dry substrates. It is suitable for use with underfloor heating.

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Product Details

Ultramax MS Adhesive Sealant