What Inseal does

Inseal (legal entity Indiana Sealant and Adhesives LLC) is a family-owned manufacturer of butyl rubber sealants, adhesives, tapes, waterstops, and pipe couplings headquartered in Elkhart, Indiana, at 3200 County Road 6 East. The company produces a focused portfolio of approximately ten cataloged SKUs spanning butyl tapes (EX208, EX210, EX281), automotive sealants (EX213), HVAC mastics (EX205), hydrophilic waterstops (EX216), fuel-resistant waterstops (EX221), skinning sealants (SC 737), rope-form joint sealants (Crete-Stik), and external pipe couplings (Strap Wrap). Several products carry industry certifications including ASTM C990, AASHTO M198, ASTM C972, ASTM C877 Type II, and UL, supporting use in code-driven infrastructure and mechanical applications. Manufacturing is concentrated at the single Elkhart facility.

The company addresses sealing requirements across seven distinct end markets: automotive aftermarket, recreational vehicles, manufactured/mobile housing, metal buildings, HVAC, marine vessels, and concrete construction. This horizontal segmentation approach diversifies revenue exposure across contractor-driven verticals but limits depth in any single category relative to dedicated specialists. The go-to-market is sales-led and direct: Inseal sells through its website, phone (574) 264-9614, and email ([email protected]) with quote-based pricing and no public price list. Content marketing via the company website (educational articles on butyl tape versus sealant, waterstop selection, fuel-resistant sealants) and downloadable SDS/TDS technical documentation supports technical buyer evaluation, particularly for infrastructure and HVAC specifying engineers.

Inseal operates as a privately held LLC with no disclosed institutional investment, no funding history, no M&A activity, and no reported leadership changes in the available data. The company employs 11-50 people and reaches customers nationwide across the United States but does not disclose international operations. Strategic priorities signaled by the data emphasize R&D, quality assurance, and customer service over scale or market consolidation. The complete absence of disclosed financials, headcount trends, and ownership structure beyond family ownership represents a material information gap for any external valuation or trajectory assessment.

Name

Inseal

Legal name

Indiana Sealant and Adhesives LLC

Website

https://inseal.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Inseal is a family-owned Indiana manufacturer of butyl rubber sealants, tapes, waterstops, and pipe couplings serving automotive, RV, manufactured housing, HVAC, marine, metal building, and concrete construction markets via direct nationwide sales.

Ownership category

akta.pro rank

Product category

Industrial Sealants and Adhesives

NAICS

Adhesive Manufacturing (32552), Paint, Coating, and Adhesive Manufacturing (3255), Gasket, Packing, and Sealing Device Manufacturing (339991)

SIC

Adhesives & Sealants (2891), Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050), Fabricated Rubber Products, Nec (3060)

akta.pro primary industry

Adhesives & Sealants Chemicals (IMAEABAA)

akta.pro secondary industry

Adhesive, Sealant & Gasket Rubber Compounds (IMANAJAI)

Keywords

• Butyl rubber sealants
• Industrial adhesives
• HVAC sealants
• Marine sealants
• Waterstop products

Headquarters

HQ city

Elkhart

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Sealant Product Sales: Revenue generated from the sale of butyl rubber sealants, adhesives, and related products. Products include sealants in various forms (rope, tape, liquid), waterstops, pipe couplings, and specialty coatings. Sales to contractors, builders, and end consumers in automotive, marine, construction, HVAC, and manufactured housing markets.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

Inseal manufactures butyl rubber sealants, adhesives, waterstops, gasket tapes, and pipe couplings for watertight and airtight sealing across automotive, RV, manufactured housing, HVAC, marine, metal buildings, and concrete construction applications. The company produces specialized products such as trimmable butyl tapes, hydrophilic waterstops, fuel-resistant waterstops, HVAC mastics, and ASTM-compliant joint sealants, selling directly to contractors, builders, and end consumers in the United States.

Product overview

Inseal is a manufacturer of butyl rubber sealants, adhesives, and related sealing products serving multiple industries including automotive, RV, mobile home, HVAC, marine, and metal buildings. The company offers a portfolio of specialized products including: trimmable butyl tapes (EX281), automotive sealants (EX213), hydrophilic waterstops (EX216) for water-activated expansion in concrete joints, fuel-resistant waterstops (EX221) for hydrocarbon environments, HVAC sealants (EX205, EX210), butyl tapes (EX208), joint sealants in rope form (Crete-Stik), and pipe couplings (Strap Wrap). Products are distributed through various channels including direct sales, and the company operates as Indiana Sealant & Adhesives LLC based in Elkhart, Indiana.

Differentiator

Problem solved

Functional benefit

Products and services

• EX281 Trimmable Butyl A flexible, trimmable butyl tape designed for sealing irregular or uniquely shaped joints. Provides a durable, weather-tight seal across a wide range of surfaces and applications including marine, automotive, RV, and metal buildings.
• EX213 Automotive Sealant An automotive sealant that adheres to metal, aluminum, rubber, and fiberglass for sealing windows and other vehicle elements. Also serves marine and RV applications.
• EX216 Hydrophilic Waterstop A water-activated, swellable waterstop designed to create watertight seals in concrete construction joints. Expands when exposed to moisture to fill voids and prevent water infiltration.
• EX205 HVAC UL Certified Sealant A fiber-reinforced mastic sealant designed to seal leaks in HVAC ductwork and mechanical connections. Creates a durable, flexible, and airtight seal to improve system efficiency and performance; UL certified.
• EX208 Butyl Tape A highly adhesive, tacky butyl tape designed to bond to a wide range of surfaces and create a flexible, weather-tight seal. Ideal for sealing seams, joints, and connections.
• EX210 Gasket Tape A commodity gasket tape for HVAC applications.
• EX221 Fuel-Resistant Waterstop A preformed adhesive waterstop designed to control the ingress and egress of hydrocarbons and containing liquids at concrete joints. Formulated with an NBR-based compound and solvent-resistant materials; resistant to gasoline, jet fuel, kerosene, motor oil, diesel, brake and transmission fluids.
• Crete-Stik Butyl Sealant A butyl bitumen blend sealant in rope form compliant to ASTM C990. Designed for sealing joints in underground concrete and containment structures including manholes, wet wells, septic tanks, and box culverts.
• Strap Wrap Pipe Coupling An external pipe coupling designed to join similar pipe types in the field. Features a mastic layer for connection and a woven layer for protection against tears or punctures. Meets ASTM C877 Type II standards.
• SC 737 Skinning Sealant A skinning sealant with excellent slump resistance and non-staining properties to common materials. Designed for metal building applications.

Quantifiable outcome

• Reduces air leakage to improve energy efficiency in HVAC systems
• +2 more outcomes

Segments7 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators1 record

Expansion highlights3 records

Broad incumbents

• Bostik (Arkema): Global adhesives and sealants manufacturer (Arkema subsidiary) producing butyl and hybrid sealants for construction, transportation, and industrial markets. Directly comparable product chemistry and end-market overlap, but at vastly larger scale and broader portfolio.
• Sika AG: Global specialty chemicals company producing sealants, adhesives, and waterproofing for construction and transportation. Competes broadly with Inseal's concrete and metal building sealant lines, though Sika operates at significantly larger scale.
• Royal Adhesives & Sealants (H.B. Fuller): Acquired by H.B. Fuller, Royal historically produced butyl and specialty sealants for aerospace, transportation, and construction. Comparable butyl technology base; much broader corporate and geographic footprint.

Direct peers

• Chem Link: US manufacturer of sealants, adhesives, and waterproofing products for construction and roofing. Overlap in concrete joint sealing, pipe coupling, and building envelope applications similar to Inseal's Crete-Stik and Strap Wrap products.
• Henry Company: Manufacturer of building envelope systems including sealants, flashing, and roofing products. Comparable in metal building, manufactured housing, and HVAC ductwork sealing categories served by Inseal's SC 737, EX205, and related SKUs.
• Press-Seal Corporation: US manufacturer of preformed sealants, gaskets, and waterstops for concrete pipe and manhole joints. Direct competitor in the manhole, wet well, and box culvert joint-sealant niche that Inseal's Crete-Stik addresses.
• Hodgson Sealants: UK-based butyl rubber tape and sealant manufacturer with overlapping product formats (joint sealants, gasket tapes). Closest direct competitor in butyl technology and tape-format delivery, comparable niche positioning.
• ADCO Products: Manufacturer of sealants, adhesives, and tapes serving the RV, manufactured housing, automotive, and construction markets. Highly comparable customer-segment footprint to Inseal's mobile home and RV verticals.
• Tremco Incorporated: Specializes in sealants, waterproofing, and weatherproofing for construction and infrastructure. Tremco's butyl and hybrid sealants target overlapping concrete joint, metal building, and HVAC ductwork applications served by Inseal's Crete-Stik and EX205 lines.

Regional players

• Crafco Inc. US manufacturer focused on pavement maintenance and sealing products, including joint sealants for concrete infrastructure. Adjacent product-application overlap with Inseal's concrete joint sealing line, primarily US-focused but in a related infrastructure niche.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Inseal