DOWSIL, in brief: products and EPD coverage
DOWSIL is on almost every façade submittal set. Yet when carbon reporting shows up on the spec, many teams still ask the same question: which DOWSIL products actually have product‑specific EPDs today, and where are the gaps that could cost them specs tomorrow?
Who they are and what they sell
DOWSIL is Dow’s construction‑facing silicones brand. The portfolio spans structural glazing silicones, weatherproofing sealants, insulating glass secondary seals, primers, pavement and runway joint sealants, silicone transition membranes, and liquid‑applied coatings. Their public submittal hub bundles LEED letters, VOC reports, guide specs, and warranties for flagship items like 791, 795, 983, DEFENDAIR 200C, and ALLGUARD (Dow, 2025).
Breadth of the range
This is not a single‑product play. Across the building envelope, DOWSIL participates in several MasterFormat families, typically:
- 07 92 00 Joint Sealants
- 08 85 13 Glazing and Structural Silicone
- 07 25 13 Weather‑barrier Transitions and 07 27 26 Air Barriers
- 32 13 73 Concrete Paving Joint Sealants
Across regions, the active SKUs likely sit in the hundreds, with dozens of formulations tuned for façade, IG, sanitary, pavement, and specialty needs.
Public EPD coverage today
As of December 20, 2025, we could not locate publicly listed, product‑specific EPDs for DOWSIL’s core building sealants in major, open EPD registries checked. That includes a name search in EPD International’s library returning zero relevant entries for DOWSIL branded construction sealants (EPD International library, 2025).
What competitors publish
Competitors that often go head‑to‑head with DOWSIL in specs do host EPD libraries. Sika provides a broad EPD catalogue across membranes, flooring, admixtures and other envelope systems, which signals organizational muscle for declarations even when the exact silicone class varies by product line (Sika USA EPD library, 2025). Tremco CPG Europe likewise maintains an EPD hub for multiple product families, making it simpler for specifiers to select covered options when projects request EPDs (Tremco CPG Europe EPD hub, 2025).
The sealants category is EPD‑able
Silicone joint sealants are not exempt from EPD practice. European programs list product‑specific EPDs for silicone‑based joint sealants, which shows that credible PCRs and verification routes exist for this chemistry. In other words, the category can absolutely be covered when a manufacturer leans in (EPD International entry for “Elastic Joint Sealant,” 2025).
Where this bites in specification
On projects targeting rigorous carbon accounting or chasing LEED v5 credits, products without product‑specific EPDs are frequently modeled with conservative defaults. That can introduce a selection penalty that nudges buyers toward covered alternatives. If a spec calls for a medium‑modulus weatherseal in a curtainwall, a functionally comparable silicone with an EPD may look lower‑risk for the design team, even if performance is similar on paper.
Likely best‑seller example
DOWSIL 795 is a staple in façade work. We did not find a publicly posted, product‑specific EPD for 795 in the registries we checked. Meanwhile, competing sealant makers show a pattern of publishing EPDs across adjacent envelope products that sit on the same submittal stack, which can sway procurement on EPD‑sensitive projects. This is a fixable gap that likley leaves revenue on the table.
How to close the gap quickly
A practical path is to scope a sealants program rather than a single one‑off. Start with a representative reference plant year and target the high‑runner SKUs in 07 92 00 and 08 85 13. Pick a PCR commonly used by peer sealant EPDs to streamline reviewer alignment, decide on US or EU program operators based on market focus, and line up plant utility, raw material, and packaging data early so the LCA team can move fast.
Who DOWSIL competes with on jobs
Expect Sika (Sikasil lines, plus membranes and flooring that can carry EPDs), Tremco CPG (Spectrem, Tremsil, and CPG transitions), Momentive/GE Silicones in certain regions, and Pecora in North America. In air and weather barriers, adjacent competition can include GCP, Prosoco, and others when systems are value‑engineered.
A note on corporate sustainability
Dow communicates broader sustainability targets on climate, water, and circularity, which can help support portfolio‑level narratives even as product‑level EPDs are built. See their targets page for current commitments and timelines (Dow Sustainability Targets).
Bottom line for manufacturers
Sealants are specification glue. When they lack product‑specific EPDs, teams doing embodied‑carbon math may default to competitors who show up with verifiable declarations. The lift to cover a focused sealant set is manageable, the commercial payoff shows up in winnable specs, and the same data foundation can be reused for renewals and future SKUs.
Frequently Asked Questions
How many product categories and SKUs does DOWSIL serve in construction?
Across regions, DOWSIL participates in several MasterFormat families and the active SKUs are likely in the hundreds globally, with dozens of formulations per major use case. Public submittal resources show a wide range of sealants, IG secondary seals, air‑barrier coatings, and transitions (Dow, 2025).
Do silicone sealants have PCRs and program routes suitable for EPDs?
Yes. European program operators list product‑specific EPDs for silicone joint sealants, demonstrating viable PCR coverage and verification practice for this chemistry (EPD International entry for “Elastic Joint Sealant,” 2025).
Is the lack of a product‑specific EPD a deal breaker for LEED v5 projects?
It is not always a hard stop, but it can introduce a modeling penalty that makes covered alternatives more attractive. Publishing product‑specific EPDs removes that friction and improves specability on carbon‑aware projects.
About the Author
Walker Ryan is a climate-tech entrepreneur focused on driving industrial decarbonization through better data. As the founder and CEO of Parq, he helps manufacturers generate high-quality, third-party–verified carbon disclosures at scale—accelerating a traditionally slow and expensive process. Before starting Parq, Walker led over $200 million in sustainability-focused investments as VP of Strategy & Growth at ReStream Solutions, following earlier experience in investment banking at Deutsche Bank. He brings a rare mix of capital markets expertise and hands-on sustainability knowledge to tackling the infrastructure of industrial emissions.
