--- title: Why Does Spray Foam Change Color? description: Spray foam insulation changes color when it’s being installed, but why? Discover the chemistry behind spray foam color changes. image: https://scsfoam.com/hubfs/Article%20Title%20Images/Why%20Does%20Spray%20Foam%20Change%20Color.png --- [Skip to main content](https://scsfoam.com/blog/why-spray-foam-insulation-changes-color#maincontent) [(717) 895-3498](tel:7178953498) [![South Central Services Insulation](https://scsfoam.com/hs-fs/hubfs/branding/Website%20Logo%20Classic.png?width=900&height=300&name=Website%20Logo%20Classic.png) ![South Central Services Insulation](https://scsfoam.com/hs-fs/hubfs/branding/Website%20Logo%20White.png?width=900&height=300&name=Website%20Logo%20White.png)](https://scsfoam.com/) [Our Service Areas](https://scsfoam.com/our-services-areas) Pricing - [Our Rates](https://scsfoam.com/our-rates) - [Calculators](https://scsfoam.com/pricing-calculators) - [Financing](https://scsfoam.com/financing-options/) - [Rebates](https://scsfoam.com/rebates) [Our Team](https://scsfoam.com/our-team) Services - Residential Insulation - [Attic Insulation](https://scsfoam.com/attic-insulation) - [Basement Insulation](https://scsfoam.com/basement-insulation) - [Crawl Space Repair](https://scsfoam.com/crawl-space-encapsulation) - [Commercial Spray Foam](https://scsfoam.com/commercial-spray-foam/) - [New Construction Insulation](https://scsfoam.com/new-home-construction-insulation/) - [Pole Building Insulation](https://scsfoam.com/pole-building-insulation) - [Air-Sealing](https://scsfoam.com/air-sealing) - [Blower Door Tests](https://scsfoam.com/blower-door-tests) [Our Products](https://scsfoam.com/our-products) Learning Center - [Learning Center](https://scsfoam.com/learning-center) - [Downloadable Resources](https://scsfoam.com/downloadable-resources) - [FAQ](https://scsfoam.com/faq/) Open Search [Get A Quote](https://scsfoam.com/contact/) Search for topics or resources Enter your search below and hit enter or click the search icon. Search for topics or resources Close Search [Our Service Areas](https://scsfoam.com/our-services-areas) Pricing Pricing [Our Rates](https://scsfoam.com/our-rates) [Calculators](https://scsfoam.com/pricing-calculators) [Financing](https://scsfoam.com/financing-options/) [Rebates](https://scsfoam.com/rebates) [Our Team](https://scsfoam.com/our-team) Services Services Residential Insulation Residential Insulation [Attic Insulation](https://scsfoam.com/attic-insulation) [Basement Insulation](https://scsfoam.com/basement-insulation) [Crawl Space Repair](https://scsfoam.com/crawl-space-encapsulation) [Commercial Spray Foam](https://scsfoam.com/commercial-spray-foam/) [New Construction Insulation](https://scsfoam.com/new-home-construction-insulation/) [Pole Building Insulation](https://scsfoam.com/pole-building-insulation) [Air-Sealing](https://scsfoam.com/air-sealing) [Blower Door Tests](https://scsfoam.com/blower-door-tests) [Our Products](https://scsfoam.com/our-products) Learning Center Learning Center [Learning Center](https://scsfoam.com/learning-center) [Downloadable Resources](https://scsfoam.com/downloadable-resources) [FAQ](https://scsfoam.com/faq/) [(717) 895-3498](tel:7178953498) [Get A Quote](https://scsfoam.com/contact/) [«  View All Posts](https://scsfoam.com/blog) # Why Does Spray Foam Change Color? November 4th, 2024 3 min read By [Kilian Agha](https://scsfoam.com/blog/author/kilian-agha) ![](https://scsfoam.com/hubfs/Article%20Title%20Images/Why%20Does%20Spray%20Foam%20Change%20Color.png) If you’re researching spray foam insulation, you probably have a lot of questions. How long does spray foam last? What kind of R-value does spray foam offer? Why can closed cell spray foam be installed in basements, while open cell spray foam can’t? Why does spray foam seem to change color in videos of it being sprayed? South Central Services has insulated hundreds of homes with spray foam insulation. We are happy to answer any questions about spray foam. As the experts, we break down how and why spray foam works. By the time you’ve finished reading this article, you’ll understand why spray foam changes color during manufacturing and if it impacts your finished product. > Don't have time to read right now? Check out [everything you need to know at a glance](https://scsfoam.com/hubfs/At%20A%20Glance/Why%20Does%20Spray%20Foam%20Change%20Color.pdf). ## Spray Foam Is Created Through A Chemical Reaction. When you hire a professional contractor to install spray foam for a project, you hire them for their expertise and equipment. The [spray foam rig](https://scsfoam.com/blog/spray-foam-insulation-glossary#spray-foam-rig-definition) rolls up to your driveway, but the finished spray foam isn’t inside the rig. The rig holds the equipment and components to create spray foam. Spray foam insulation is [created through an exothermic chemical reaction](https://scsfoam.com/blog/how-spray-foam-insulation-is-made). Spray foam creates heat and off-gassing fumes as a byproduct, with the product of the reaction being foam. To make a stable foam, variables like temperature, pressure, and ratio must be monitored and maintained. ![The chemical reaction to create spray foam represented as a math equation. A-Side plus B-Side equals a fixed amount of products and byproducts.](https://scsfoam.com/hs-fs/hubfs/Article%20Graphics/Chemical%20Reaction%20to%20Create%20Foam.png?width=533&height=400&name=Chemical%20Reaction%20to%20Create%20Foam.png) ### Before Spraying, Spray Foam Components Look Similar To Motor Oil. So, what do spray foam components look like? It depends on the manufacturer of the foam, but as a general rule, the liquid in spray foam drums looks a lot like motor oil. ![The interior of South Central Services' spray foam rig. A team member puts a spray foam component drum in place on the rig.](https://scsfoam.com/hs-fs/hubfs/Article%20Graphics/Rig%20and%20Component%20Drums%20Action%20Shot.jpg?width=600&height=400&name=Rig%20and%20Component%20Drums%20Action%20Shot.jpg) > When these two chemical components are portioned, heated, atomized, and mixed, a color change also occurs. ## The Chemical Reaction Goes Through Several Stages. There are two chemical reaction stages where you can see color changes. These color changes are observable evidence of the chemical reaction taking place. > [          View this post on Instagram                      ](https://www.instagram.com/reel/C8NHgOhv3iT/?utm_source=ig_embed&utm_campaign=loading) > > [A post shared by South Central Services Insulation (@scsfoam)](https://www.instagram.com/reel/C8NHgOhv3iT/?utm_source=ig_embed&utm_campaign=loading) If you sat down with a professional contractor, they could explain the industry terminology associated with these two stages: cream time and rise time. Let’s examine the chemical reaction and color change of these stages in more detail. ### During Cream Time, Components Meet And Appear Tan. Cream time refers to when the foam components go from a liquid state to a solid state. The liquid chemicals contained in the spray foam drums have been portioned, heated, and atomized. Once they mix at the tip of the spray gun and are applied to a substrate, the chemicals are no longer liquid. During the cream time, the color of the foam is no longer comparable to motor oil. Instead, the product looks more yellow or tan for the foams we use. [via GIPHY](https://giphy.com/gifs/closed-cell-spray-foam-on-roof-system-gLtgn4u0C2gGJYDn87) > This flash of color happens for only a moment before the next stage of the chemical reaction takes place. ### During Rise Time, Foam Rises And Changes Color. Rise time happens almost immediately after spraying the foam. The expansion of the foam is almost instantaneous. During rise time, the foam changes color again as it rises. For the foams we use at South Central Services, this color change is a movement from a yellowish-brown color to a creamy-white color. [via GIPHY](https://giphy.com/gifs/spray-foam-insulation-expanding-expansion-9x57w6e8wSV2QHLWu0) Rise time is the period when foam expands and cures. ## Foam Color Depends On Manufacturer Ingredients And Design. You may have seen more exciting foam colors online. Purples, greens, and blues are all examples of foam colors on the market. Why are these foams colorful, while some foams are more white or yellow? ![A spray foam installer insulating with dyed blue spray foam insulation in a new construction wall cavity.](https://scsfoam.com/hs-fs/hubfs/Article%20Graphics/Stock%20Image%20Blue%20Foam.jpg?width=477&height=400&name=Stock%20Image%20Blue%20Foam.jpg) The color of the foam comes down to the manufacturer and the foam ingredients. Colorful foams are dyed to appear that color. A different color of foam doesn’t indicate any particular performance or R-value. > The natural color of foam is cream. Some foams are more white, while others are more yellow. The hue depends on the manufacturer. ## Most Spray Foam Color Changes Are Normal And Expected. All of the color changes we’ve outlined so far happen during the installation process. These natural color changes would only be seen by the contractor, unless they share footage online and someone picks up on the subtle differences. But what about spray foam color changes after installation? Most spray foam color changes are normal and expected. Spray foam insulation does tend to [yellow over time](https://scsfoam.com/blog/why-does-spray-foam-insulation-turn-yellow-over-time), especially when exposed to sunlight. ![Yellowed spray foam insulation in a ceiling cavity.](https://scsfoam.com/hs-fs/hubfs/Article%20Title%20Images/Why%20Does%20Spray%20Foam%20Turn%20Yellow.jpg?width=506&height=400&name=Why%20Does%20Spray%20Foam%20Turn%20Yellow.jpg) In rare cases, a color change can indicate off-ratio foam. Foam that is splotchy and extremely inconsistent in color can be an indicator. However, off-ratio foam is not something a homeowner can diagnose independently. If you are worried about the color of your foam after checking for odor and tackiness, contact a professional. ## The Bottom Line About Why Spray Foam Changes Color Because spray foam is created through a chemical reaction, it does experience some natural color changes during manufacturing. Liquid components start quite dark but turn much lighter in the transformation from liquid to solid. As foam rises, it changes color again, settling on its final color. If the foam is coated or covered to protect it from UV ray exposure, it should not yellow significantly over time. If spray foam has experienced significant color change that presents as splotchy or extremely inconsistent in color, call a professional contractor for a foam diagnosis. There is a chance that color inconsistency is an indicator of off-ratio foam. Now that you know why spray foam changes color during manufacturing, your next step is to: - [Find out how long spray foam insulation is supposed to last](https://scsfoam.com/blog/how-long-does-spray-foam-insulation-last) - [Discover if spray foam can really make a home more comfortable](https://scsfoam.com/blog/does-spray-foam-make-homes-more-comfortable) [![Download My Checklist](https://no-cache.hubspot.com/cta/default/39735758/interactive-125762619044.png)](https://scsfoam.com/hs/cta/wi/redirect?encryptedPayload=AVxigLICyoltCnS%2BE%2F%2BmKcrHhO01m1LyfoPhRo8hgEP8vvFeqg0DXJJfLPzy8WBRRNLWT8TumbnOFEuHmxpk%2FNLNQbScQshmvvvSFTY%2FY0UnJ9SnFTd6x8HVNBacjttvHj8LB1cg96qz5p3EXoUxgdNVvtzhQ2Yf4IkkBE%2FZJWEIaZHd5uvbufjQIYdb9uVfv3ocsaY13FdUl3c%3D&webInteractiveContentId=125762619044&portalId=39735758) *Disclaimer: While we strive to publish information accurate to building science, local building codes and standards supersede our recommendations.* [Kilian Agha](https://scsfoam.com/blog/author/kilian-agha) Kilian has co-owned and operated South Central Services for 8 years. He is passionate about community involvement. In his spare time, he enjoys being with his family, playing ice hockey, and going fishing with friends. Topics: [Fundamentals](https://scsfoam.com/blog/topic/fundamentals) Don't forget to share this post: ## Related Articles ### [16 Terms To Know When Insulating Your Basement June 13th, 2025|4 min read](https://scsfoam.com/blog/terms-to-know-when-insulating-a-basement) ### [25 Terms To Know When Insulating A New Home May 21st, 2025|6 min read](https://scsfoam.com/blog/terms-to-know-when-insulating-a-new-home) ### [Why Does Spray Foam Turn Yellow Over Time? January 15th, 2025|2 min read](https://scsfoam.com/blog/why-does-spray-foam-insulation-turn-yellow-over-time) ### [Why Is Spray Foam A Good Insulator? December 11th, 2024|4 min read](https://scsfoam.com/blog/why-spray-foam-is-a-good-insulator) ### [What Does A Blower Door Test Do? December 2nd, 2024|2 min read](https://scsfoam.com/blog/what-does-a-blower-door-test-do) ### [Does Spray Foam Insulation Lose Its R-Value? September 11th, 2024|4 min read](https://scsfoam.com/blog/does-spray-foam-lose-r-value) ### [What To Expect From An Insulation Upgrade June 12th, 2024|5 min read](https://scsfoam.com/blog/what-to-expect-from-an-insulation-upgrade) ### [Can You Spray Foam Behind Drywall? May 15th, 2024|5 min read](https://scsfoam.com/blog/can-you-spray-foam-behind-drywall) ### [6 Problems With Spray Foam Insulation Explained April 8th, 2024|5 min read](https://scsfoam.com/blog/problems-with-spray-foam-insulation-explained) ### [Can Open Cell Spray Foam Create A Vapor Barrier? March 27th, 2024|3 min read](https://scsfoam.com/blog/can-open-cell-create-a-vapor-barrier) ### [Is Spray Foam Insulation Safe To Breathe? March 4th, 2024|3 min read](https://scsfoam.com/blog/is-spray-foam-insulation-safe-to-breathe) ### [Can You Put Spray Foam In Existing Walls? January 26th, 2024|4 min read](https://scsfoam.com/blog/can-you-put-spray-foam-in-existing-walls) ### [What Is Flash And Batt Insulation? January 3rd, 2024|6 min read](https://scsfoam.com/blog/what-is-flash-and-batt-insulation) ### [What Is Spray Foam Insulation Made Of? December 20th, 2023|4 min read](https://scsfoam.com/blog/what-spray-foam-insulation-is-made-of) ### [What Is Crawl Space Encapsulation? December 15th, 2023|7 min read](https://scsfoam.com/blog/what-is-crawl-space-encapsulation) ### [Is Installing Insulation Dangerous? December 13th, 2023|3 min read](https://scsfoam.com/blog/is-installing-insulation-dangerous) ### [Which Type Of Spray Foam Insulation Is Best? December 4th, 2023|7 min read](https://scsfoam.com/blog/which-spray-foam-insulation-is-best) ### [What Does R-Value Mean In Insulation? November 17th, 2023|4 min read](https://scsfoam.com/blog/what-insulation-r-value-means) ### [What Does Spray Foam Stick To? Spray Foam Insulation Application Guide October 18th, 2023|5 min read](https://scsfoam.com/blog/spray-foam-insulation-application-guide) ### [5 Reasons Why Your Energy Bill Is So High (And Fixes You Can Try) October 4th, 2023|3 min read](https://scsfoam.com/blog/why-is-my-energy-bill-so-high) ### [Why Does Spray Foam Insulation Off-Gas? September 18th, 2023|2 min read](https://scsfoam.com/blog/why-does-spray-foam-insulation-off-gas) ### [How To Save Energy In Your Home September 6th, 2023|6 min read](https://scsfoam.com/blog/how-to-save-energy-home) ### [How Spray Foam Insulation Is Made August 28th, 2023|5 min read](https://scsfoam.com/blog/how-spray-foam-insulation-is-made) ### [What Is Spray Foam Insulation? August 11th, 2023|6 min read](https://scsfoam.com/blog/what-is-spray-foam-insulation) Location 1574 Buchanan Trail East, Greencastle, PA 17225 Phone: [(717) 895-3498](tel:7178953498) Connect With Us - [Facebook](https://www.facebook.com/p/South-Central-Services-Insulation-100057064885687/) - [Instagram](https://www.instagram.com/scsfoam/) - [YouTube](https://www.youtube.com/@scsfoam) - [info@scsfoam.com](mailto:info@scsfoam.com) Services - [Attic Insulation](https://scsfoam.com/attic-insulation) - [Basement Insulation](https://scsfoam.com/basement-insulation) - [Crawl Space Repair](https://scsfoam.com/crawl-space-encapsulation) - [Commercial Spray Foam](https://scsfoam.com/commercial-spray-foam/) - [New Home Insulation](https://scsfoam.com/new-home-construction-insulation/) - [Pole Building Insulation](https://scsfoam.com/pole-building-insulation) - [Air-Sealing](https://scsfoam.com/air-sealing) - [Blower Door Tests](https://scsfoam.com/blower-door-tests) Pricing Information - [Our Rates](https://scsfoam.com/our-rates) - [Calculators](https://scsfoam.com/pricing-calculators) - [Financing Options](https://scsfoam.com/financing-options/) - [Rebate Information](https://scsfoam.com/rebates) - [Pricing Articles](https://scsfoam.com/blog/tag/product-pricing) Proud Member of Cumberland Valley Business Alliance     Company - [Our Service Areas](https://scsfoam.com/our-services-areas) - [Our Products](https://scsfoam.com/our-products) - [Our Team](https://scsfoam.com/our-team) - [Contact Us](https://scsfoam.com/contact/) - [Join Our Team](https://scsfoam.com/our-team#hiring) - [Privacy Policy](https://scsfoam.com/privacy-policy) Learn More - [FAQ](https://scsfoam.com/faq/) - [Learning Center](https://scsfoam.com/learning-center) - [Downloadable Resources](https://scsfoam.com/downloadable-resources) © 2026 South Central Services All Rights Reserved. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Kilian Agha", "url" : "https://scsfoam.com/blog/author/kilian-agha" }, "dateModified" : "2025-03-06T17:06:51.682Z", "datePublished" : "2024-11-04T17:00:00.000Z", "headline" : "Why Does Spray Foam Change Color?", "mainEntityOfPage" : { "@id" : "https://scsfoam.com/blog/why-spray-foam-insulation-changes-color", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://scsfoam.com/hubfs/branding/SCS-Updated-Logo_Horizontal-2048x397.png" }, "name" : "South Central Services" } } ```