Kicking off 2026 with a bang, PROSOCO has joined Passive House Accelerator as a Champion Sponsor. Based in Lawrence, Kansas, PROSOCO has been in business since 1939 and is a manufacturer of building envelope systems; masonry anchors to stabilize facades; and specialty chemicals for cleaning, protecting, and maintaining concrete and masonry. Their R-Guard air and water barrier products create the air- and water-tight envelopes that are vital to high-performance and Passive House buildings.
PROSOCO Signs on as Champion Sponsor of the Accelerator
Their product line that Passive House practitioners may know best is R-Guard, a durable, high-performance, fluid-applied air and water-resistive barrier system. R-Guard products help control air and water leakage to enhance building efficiency, and many products in this product group utilize silyl-terminated polymer (STP) technology—which means they can be applied to damp substrates. STP technology combines the performance of polyurethane with the durability of silicone, while remaining solvent-free, phthalate-free, and Red-List compliant. Some of the most popular products from the R-Guard line include:
Cat 5: A primary air barrier that’s applied with a sprayer or roller to above-grade structural surfaces and is suitable for use on exterior sheathing, CMU backup walls, and precast concrete. Ideal for humid climates, Cat 5 is tested to perform under the weather conditions of a Category 5 hurricane.
Cat 5 ICF: An air and water barrier specifically designed for ICF wall assemblies.
Cat 5 Rain Screen: An air and water barrier for use on exterior sheathing behind open-jointed or vented rainscreen cladding.
Spray Wrap MVP: A fluid-applied air and water-resistive barrier designed for use in cavity walls and on masonry veneer construction, stucco, EIFS, and most other building wall assemblies.
FastFlash: A liquid flashing membrane available in gun- or roller-grade that protects rough openings, fills joints and seams, counter-flashes waterproofing and air barrier components in new or existing wall assemblies, and seals around penetrations.
AirDam: An extremely durable sealant for use around window openings from building interiors, and ideal for use with FastFlash.
Joint & Seam Filler: A crucial part of any holistic wall system, Joint & Seam Filler is designed to fill gaps and provide continuous support of fluid-applied flashing membranes, waterproofing, or air barrier components.
“We have a huge amount of respect and gratitude for those who share our mission of building better, which clearly includes everyone involved with Passive House Accelerator,” said PROSOCO President Jake Boyer. “Since 1939, the leading edge has been our standard when it comes to making high-performing products that help us all build better. We look forward to sharing our knowledge, helpfulness, and research-backed solutions with you as a Champion Sponsor.”
“PROSOCO has always made incredible products,” said Passive House Accelerator Founder
Michael Ingui. “They’re also a great company to work with because they have complete systems that ensure success. Their deep knowledgebase, educational material, and clear specifications enable them to guide people who are new to Passive House and high-performance building techniques in general. That kind of real-world knowledge only comes from years of practice in the field. I’m really looking forward to having them share their expertise with the Accelerator community!”
You can check out PROSOCO’s page on the Accelerator site here.