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Isomat Flex PU-40 Polyurethane Adhesive Mastic Grey 310ml
Silicone Sealants

Isomat Flex PU-40 Polyurethane Adhesive Mastic Grey 310ml Code: 062602311

Key features:

  • Solvent-free, 1-component
  • High elasticity 450%
  • Resistance from -40°C to +100°C
  • Excellent adhesion to materials
See Description & Specifications
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Reviews (38)

Reviews

4.8
38
4.8
Review this product
  1. 34
  2. 2
  3. 3 stars
    0
  4. 1
  5. 1
Review this product
  • Value for money
  • Does it dry quickly?
  • Does it spread easily?
  • Durability

What do users say? AI-generated summary

Users rate the sealant very highly, praising its strong adhesion and flexibility in particular. It is often used to fill cracks and joints in walls, floors, and outdoor areas, with reviewers noting its durable results and good value for money. However, some say it yellows in the sun, doesn’t adhere well to painted surfaces, or may have dried out inside the packaging.

  • Δμς
    5
    Δμς

    It’s easy to work with (especially if, before applying it, you leave the cartridge in the sun in summer and in the sink with lukewarm water in winter for the appropriate amount of time), and it seems to adhere well if the surface is properly prepared and a backer rod is used to reduce the depth of the crack. Remove any loose material and wipe the bonding surfaces with industrial acetone for paint (not the kind used for nails!). I applied it to areas that aren’t stable due to minor settling/movement, e.g. outdoor steps, to keep moisture from getting through, since conventional grout cracks.

    Translated from Greek ·
    0
  • mitsmitsos
    5
    mitsmitsos

    Excellent adhesion! I filled some gaps between an accordion-type aluminum system and the wall. The color matched perfectly with the RAL7038 aluminum color.

    Translated from Greek ·
    0
  • thodogrp
    4
    thodogrp

    Very good price!
    Elastic as it should be.
    It yellows within 1.5 months when in direct contact with the sun and peels off if applied on a painted surface.

    Translated from Greek ·
    2
  • Bill_Charmanidis
    1
    Bill_Charmanidis

    Either the packaging was old or the company is worthless! It was so dried out inside, it was useless, I struggled for nothing! I went and bought one from a paint store and got my job done! Money wasted

    Translated from Greek ·
    1
  • jim_beg
    5
    jim_beg

    One of the best I have ever tried, strong adhesion and elastic... I don't know about durability over time

    Translated from Greek ·
    1
  • See all
Product report

Description & Specifications

Ensure complete sealing and strong adhesion with the solvent-free elastomeric polyurethane compound.

At a glance

  • Solvent-free composition: One-component polyurethane sealant for safe use.
  • High elasticity: 450% elongation at break for flexible joints.
  • Temperature resistance: Retains its properties from -40ºC to +100ºC.
  • Wide adhesion: Suitable for application on concrete, aluminum, steel, wood, and glass.

Absolute protection and durability

You protect your structures from the most extreme weather conditions and aging with the power of polyurethane. Thanks to its temperature resistance from -40ºC to +100ºC, you ensure reliability and durability in every horizontal or vertical joint. In addition, once the material cures, you can easily paint it with water-based paints for a flawless aesthetic result.

Top Elasticity and Adhesion

You handle demanding sealing and bonding tasks effortlessly, thanks to the material’s exceptional 450% elasticity. You can easily apply it to concrete, aluminum, steel, wood, and glass, achieving strong adhesion. Forget about wear and tear, as the advanced solvent-free formula responds perfectly to the expansion and contraction of joints.

Easy application and fast curing

You complete your work quickly, as the mastic forms a surface skin in just 50-55 minutes. With a curing speed of 3.5 mm per day, you apply the material with a gun at a 45º angle and smooth the fresh surface with a spatula. This way, you achieve a professional finish easily and cleanly, keeping your space fully protected.

Specifications

  • Base: Polyurethane sealant (1-component)
  • Color: Grey
  • Application temperature: +5ºC to +35ºC
  • Skin formation time: ≈ 50-55 min
  • Curing speed: ≥ 3.5 mm/day
  • Shore A hardness (DIN 53505): ≈ 45
  • Modulus of elasticity at 100% elongation (DIN 52455): 1.0 ± 0.1 N/mm²
  • Elongation at break (DIN 53504): 450%
  • Temperature resistance: -40ºC to +100ºC
  • Consumption: 1 cartridge / 3 m of joint (10mm x 10mm) or 12 m of joint (5mm x 5mm)

Manufacturer

Manufacturer Details

Warnings & Safety Information
Product Number
062602311

Dimensions

Type
Mastic
Packaging
Cartridge
Colour
Grey

Attributes

Adhesive
Yes
Mold Resistant
No
for Wood
No
High Temperature
No
Aquarium
No
Acrylic
No
Polyurethane
Yes

Quantity

Mass Gaining
310 ml

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (38)

4.8
38
4.8
Review this product
  1. 34
  2. 2
  3. 3 stars
    0
  4. 1
  5. 1
Review this product
  • Value for money
  • Does it dry quickly?
  • Does it spread easily?
  • Durability

What do users say? AI-generated summary

Users rate the sealant very highly, praising its strong adhesion and flexibility in particular. It is often used to fill cracks and joints in walls, floors, and outdoor areas, with reviewers noting its durable results and good value for money. However, some say it yellows in the sun, doesn’t adhere well to painted surfaces, or may have dried out inside the packaging.

  • Δμς
    5
    Δμς

    It’s easy to work with (especially if, before applying it, you leave the cartridge in the sun in summer and in the sink with lukewarm water in winter for the appropriate amount of time), and it seems to adhere well if the surface is properly prepared and a backer rod is used to reduce the depth of the crack. Remove any loose material and wipe the bonding surfaces with industrial acetone for paint (not the kind used for nails!). I applied it to areas that aren’t stable due to minor settling/movement, e.g. outdoor steps, to keep moisture from getting through, since conventional grout cracks.

    Translated from Greek ·
    0
  • mitsmitsos
    5
    mitsmitsos

    Excellent adhesion! I filled some gaps between an accordion-type aluminum system and the wall. The color matched perfectly with the RAL7038 aluminum color.

    Translated from Greek ·
    0
  • thodogrp
    4
    thodogrp

    Very good price!
    Elastic as it should be.
    It yellows within 1.5 months when in direct contact with the sun and peels off if applied on a painted surface.

    Translated from Greek ·
    2
  • Bill_Charmanidis
    1
    Bill_Charmanidis

    Either the packaging was old or the company is worthless! It was so dried out inside, it was useless, I struggled for nothing! I went and bought one from a paint store and got my job done! Money wasted

    Translated from Greek ·
    1
  • jim_beg
    5
    jim_beg

    One of the best I have ever tried, strong adhesion and elastic... I don't know about durability over time

    Translated from Greek ·
    1
  • See all