The materials specification landscape for facade sealing is shifting decisively. Across Tier 1 and Tier 2 commercial construction in Australia, polyurethane sealants are losing ground to MS Polymer systems. This shift isn’t driven by novelty. It reflects a measurable performance gap that becomes increasingly apparent as buildings age and remediation costs accumulate. Simflex Facade, Simseal’s flagship MS Polymer facade sealant, sits at the centre of this change.
Facade Sealing: The Case Against Polyurethane in 2026
Polyurethane sealants have served the construction industry well for decades. They adhere to concrete reliably, accept paint once cured, and suit general use applications cost effectively. On external facades, however, their limitations have become harder to ignore as building envelopes grow more demanding and remediation costs more visible:
- UV degradation polyurethane chalks, hardens, and becomes brittle with prolonged UV exposure, typically requiring replacement within 8–12 years on exposed facades
- Moisture sensitivity during cure polyurethane reacts with moisture and produces CO₂, causing bubbling and void formation in humid conditions
- Isocyanate chemistry regulatory scrutiny of isocyanate based products is increasing, and VOC compliance demands are tightening on commercial sites
- Limited movement capability standard polyurethane typically handles ±25% movement, insufficient for high movement facade joints
Why MS Polymer Addresses Each of These Limitations
Simflex Facade’s MS Polymer formulation tackles each polyurethane weakness directly. The polymer backbone resists UV photodegradation without relying on UV stabiliser additives that deplete over time so UV stability is intrinsic, not applied. It cures without moisture sensitivity, and without isocyanate chemistry, so bubbling and occupational health restrictions become non issues. Moreover, its ±50% movement capability handles the joint demands of contemporary facade systems that polyurethane cannot reach.
| PRODUCT SPOTLIGHT: Simflex Facade The MS Polymer Standard for 2026
Superior UV stability outperforms polyurethane on exposed facade joints Zero shrinkage on cure consistent joint geometry from application through service life ±50% movement capability meets the demands of high performance facade systems Isocyanate free no occupational health restrictions, improved site safety profile Silicone oil free no staining migration onto adjacent cladding or stone Specify Simflex Facade for your 2026 projects → Contact Seal’em Solutions for facade specification support → |
Facade Sealing: What Architects and Contractors Are Specifying in 2026
Leading architectural practices and Tier 1 contractors now include MS Polymer specifications by name in facade documentation. They cite UV durability, movement capability, and an improved occupational health profile as the key drivers. For specification purposes, MS Polymer sealants like Simflex Facade reference into NatSpec sections covering external sealants and joint treatments. Seal’em Solutions works directly with architects and project teams to develop technically sound sealant specifications. Our team engages at the specification stage before a project reaches site so joint design, product selection, and application methodology align from the start.
External reference: Australian Building Codes Board NCC facade and external envelope requirements
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