Adhesives and flexible sealants
MS Polymer technology has now established itself as the standard for high-performance flexible bonding and sealing. Unlike classic polyurethanes (PU), sealants in the ACRObond range are based on a hybrid polymer base that cross-links upon contact with atmospheric moisture. This chemistry combines the mechanical advantages of polyurethane with the climatic resistance of silicone, without the drawbacks of isocyanates or solvents.
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Why Choose MS Polymer for Your Assemblies?
Switching to an MS sealant meets strict durability and HSE (Health, Safety, and Environment) requirements. It is a versatile solution capable of compensating for thermal expansion between dissimilar materials (metal, glass, composites).
Universal Adhesion Without Primer
One of the main assets of our MS sealants is their ability to wet almost all surfaces without heavy chemical preparation. They offer exceptional hold on aluminium, stainless steel, ABS, polycarbonate, wood, and glass, thereby reducing process times in production.
UV Resistance and Environmental Stability
Unlike polyurethane, which eventually cracks or yellows under the effect of the sun, MS Polymer offers superior resistance to UV rays and weathering. Our references, such as MS 43 or MS NV, retain their elasticity over the long term, guaranteeing the sealing of exterior assemblies in the transport and construction sectors.
Safety and Finish
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Health (HSE): Formulations free from solvents, phthalates, and isocyanates, meeting the strictest VOC standards.
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Paintability: MS Polymer joints can be painted immediately after skin formation ("wet-on-wet" system) with the majority of industrial lacquers, which is impossible with a silicone sealant.
Sector Applications for Hybrid Sealants
The versatility of our range allows it to meet the most demanding specifications:
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Transport and Bodywork: Bonding of roofs, side panels, and floors. Vibration absorption and structural sealing.
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Industry: Sealing of technical glazing and mirror bonding (without attacking the silvering).
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Marine and Boating: Deck and porthole sealing thanks to exceptional resistance to salt water.
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Construction: Expansion joints, roof sealing, and fixation of insulation panels.
FAQ: Everything You Need to Know About MS Polymer Sealant
1. What is the difference between a PU sealant and an MS sealant? MS sealant is more UV-resistant and does not contain (toxic) isocyanates. Furthermore, it does not bubble during polymerisation, even in high humidity, unlike PU which can release CO2 and weaken the joint.
2. What does "High Tack" mean in the MS range? High Tack (like our MS High Tack) designates extremely high initial adhesion (grab). This allows heavy elements to be fixed vertically without propping or temporary mechanical fastening.
3. Can MS Polymer be applied to a damp substrate? Yes. The cross-linking of MS Polymer requires moisture. It can therefore be applied to damp (non-running) surfaces without loss of adhesion, making it a valuable ally for exterior maintenance.
4. Is it possible to paint an MS Polymer joint? Yes, this is one of its great advantages. However, a preliminary test is recommended, as some water-based paints may have a longer drying time over the sealant.
5. How to clean excess MS sealant? Before polymerisation, excess product is easily cleaned with a solvent like ACRODIS 242 or isopropyl alcohol. Once cured, removal can only be mechanical.
ACROM Expertise: Get a Personalised Recommendation
The choice of an MS Polymer sealant depends on the desired thixotropy, skin formation time, and the final Shore hardness required for your application. ACROM supports you in the technical dimensioning of your sealing solutions.
