Moisture Cure Sealant Patents: Top Companies & Filing Trends 2026
A patent landscape review of moisture cure sealant technology: filing trends 2015-2026, assignee concentration, IPC composition and the most-cited prior art, built from 244 records in scope.
Filing growth = 2021 (2 records) → 2024 (0); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 244 records in scope (CR5), not the ranked leaders only.
What the moisture cure sealant filing record shows
Moisture cure sealant patenting sits at the intersection of polyurethane and silicone chemistry, additive formulation, and application-specific sealing hardware. The corpus in scope — 244 records spanning 2015 through the 2026 cut-off — covers everything from glazing sealants to aerospace fastener coatings, with condensation polymer (C08G) and polymer composition (C08L) classes each touching roughly a third of the field. Publication lags filing by around 18 months, so any read of the most recent two years understates real activity.
Filing concentration is pronounced without being absolute: a single leader accounts for 36 records, and the top five combined hold 36.1% of all 244 records in scope. That leaves a long tail of single- and few-filing entrants below the tenth-ranked assignee, who holds 8 records — room for a new entrant to stake a defensible position in a less-contested branch rather than compete head-on for the dominant claim territory.
Filing trend and technology composition
Two views of the same 244 records: how filing activity has moved year over year, and how the classification codes on those records cluster around specific chemistry and application areas.
Filing trend, 2017-2026
Filings rose from 8 in 2017 to a peak of 15 in 2020, then declined; the 2021-to-2024 span shows a -100% swing (2 records to 0), the last window that can be read as complete given publication lag. Years from 2025 are still filling in and should not be read as a continued decline.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
IPC subclass distribution
C08G (condensation polymers, 33.2% of records) and C08L (polymer compositions, 32.0%) lead the classification mix, followed by C09K (materials for miscellaneous applications, 27.9%) and C09J (adhesives proper, 23.0%). Because records carry multiple IPC codes, these shares sum to more than 100% of the 244 records in scope.
Shares are the percentage of the 244 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaRepresentative filing and most-cited prior art
Self-Sealing Fastener (US20120168055A1)
An apparatus for making and using a fastener suitable for use in airplane manufacture or repair that is coated with a pre-mixed moisture cure sealant. The sealant layer is coated with a frangible moisture barrier that will break apart when the fastener is installed, exposing the sealant to a moisture source. Once exposed, the sealant begins to cure. Preferred embodiments also provide a premature cure indicator that signals when the outer moisture-resistant layer has been damaged.Filed by Systems and Materials Research Corporation, this application ties moisture cure sealant chemistry to a specific mechanical delivery format — a frangible barrier and cure indicator on an installable fastener — rather than claiming the sealant chemistry alone.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4625012A | Moisture curable polyurethane polymers | 409 |
| 2 | US4780520A | High speed cure sealant | 274 |
| 3 | US4687533A | Bonding method employing moisture curable polyurethane polymers | 272 |
| 4 | US20040180155A1 | Moisture curable hot melt sealants for glass constructions | 128 |
| 5 | US6284360B1 | Sealant composition, article including same, and method of using same | 124 |
| 6 | US4898910A | Modulus control in silicone sealant | 123 |
| 7 | US20040181007A1 | Moisture curable, radiation curable sealant composition | 104 |
| 8 | US5007765A | Sealing method for joints | 85 |
| 9 | US6803412B2 | Moisture curable hot melt sealants for glass constructions | 74 |
| 10 | US4758648A | High speed cure sealant | 73 |
Citation counts favour older filings inside this searched corpus and should be read as a signal of influence, not of current commercial relevance.
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Four findings from the ranking, the trend line and the classification mix that matter for where to file next and who to watch.
Leadership is real but not a lock
The leading assignee holds 36 records on its own, yet the top five together account for only 36.1% of all 244 records in scope — well short of the field being closed off. The tenth-ranked assignee holds just 8 records, meaning the middle and lower ranks are thin and open to a determined new filer.
Complete-year filings have gone quiet
The peak year was 2020 at 15 records; the last fully-resolved window, 2021 to 2024, shows filings falling to zero, a -100% swing. Years from 2025 onward are still filling in due to publication lag and should not be read as confirming a continued drop.
Condensation polymer chemistry dominates the classification mix
C08G and C08L each touch roughly a third of the 244 records, reflecting how much of this field is claimed through core polyurethane and silicone polymer chemistry rather than downstream formulation or application classes like C09D (11.5%) or C03C (10.2%).
US and EPO dominate the receiving-office split
United States filings lead at 67 records, with EPO at 43 and WIPO/PCT at 30; Canada, Australia and India each register in double digits. A filer targeting freedom-to-operate should treat the US and EPO dockets as the ones carrying the deepest prior art.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to adhesives & sealants: moisture cure sealant patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Dow Silicones Corporation | Dow Global Technologies LLC | 8 |
| Dow Silicones Corporation | WILLIEME JEAN | 5 |
| Dow Silicones Corporation | MATON ISABELLE | 5 |
| Dow Silicones Corporation | LAVINARO GIUSEPPINA | 5 |
| Dow Silicones Corporation | DRAKE ROBERT | 5 |
| Dow Silicones Corporation | DETEMMERMAN TOMMY | 5 |
| Systems and Materials Research Corporation | SCHMIDT GARY | 2 |
| Systems and Materials Research Corporation | IRVIN DAVID J | 2 |
Ten co-assignee pairs appear in the dataset. The strongest pairing links the dominant assignee's own corporate entities, indicating internal group filing rather than cross-company joint development.
Where to take this analysis
The ranking and trend data answer who is filing and how fast; the next step is usually claim-level work on a specific branch.
Map freedom-to-operate against the leading assignee's family
With one assignee holding 36 of 244 records, a claim-by-claim review of that portfolio against a target formulation is the fastest way to find out whether a planned filing sits inside occupied territory.
Explore claim mapping in EurekaTest a first claim in an under-claimed branch
C03C (glass and enamel compositions) and C09D (coatings) sit well below the dominant polymer chemistry classes, at 10.2% and 11.5% of records respectively — a starting point for a narrower, less-contested filing.
Draft and stress-test claims in EurekaCommon questions on moisture cure sealant patents
Filing is concentrated but not closed: the leading assignee holds 36 of the 244 records in scope, and the top five assignees together account for 36.1% of the field. Below the top ten — the tenth-ranked holder has 8 records — the ranking thins into a long tail of companies with only a handful of filings each. That tail is where a new entrant is most likely to find room to build a defensible position rather than compete directly with the dominant filer.
Filing peaked at 15 records in 2020 and the last fully-resolved window, 2021 to 2024, shows a fall to zero, a -100% swing. That is a genuine slowdown in complete-year data, not an artifact. However, because publication lags filing by roughly 18 months, records from 2025 onward are still arriving and should not yet be read as confirming the decline continues at the same rate.
Condensation polymer chemistry (IPC class C08G) and polymer compositions (C08L) are the two largest classes, each touching close to a third of the 244 records in scope. Materials for miscellaneous applications (C09K) and adhesives proper (C09J) follow at meaningfully lower shares. Because a single record can carry several IPC codes, these percentages overlap rather than summing to a whole field.
The classification mix points to glass and enamel compositions (C03C, 10.2% of records) and coatings/paints/inks (C09D, 11.5%) as narrower branches compared with the dominant polymer-chemistry classes above 30%. Combined with the long tail below the top ten assignees, these under-represented classes are a reasonable starting point for a first claim that avoids the densest prior art rather than competing directly against the leading portfolio holders.
US20120168055A1, filed by Systems and Materials Research Corporation, covers a fastener pre-coated with moisture cure sealant under a frangible moisture barrier that breaks on installation, exposing the sealant to moisture so it begins to cure, with an optional premature-cure indicator. It is a mechanical-delivery claim built around the sealant chemistry rather than a claim on the sealant formulation itself. Anyone designing a similarly delivered fastener sealant should review this filing's specific barrier and indicator mechanism rather than assume the underlying chemistry alone is blocked.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.