Grayline
Grayline LLC is a privately held Waukesha, Wisconsin manufacturer of custom flexible polymer tubing and heat-shrink products, serving automotive, aerospace, medical, appliance, industrial, and leisure equipment OEMs via direct consultative sales.
- Company typePrivate
- Founded1966
- HeadquartersWaukesha, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Grayline does
Grayline LLC, operating as Grayline Inc., is a privately held U.S. manufacturer of custom flexible polymer tubing and heat-shrinkable products, headquartered in Waukesha, Wisconsin, and founded in 1966. The company's core competency is custom polymer extrusion and heat-shrink manufacturing, with a catalog spanning more than 110 materials (including PVC, TPV, silicone, and fluoropolymers) and thousands of size combinations from .02" to 1.6" inner diameter, produced using in-stock tooling that allows custom runs to approach the cost of stock items. Its product portfolio comprises custom polymer tubing, heat-shrinkable tubing (single- and double-wall adhesive-lined, in 2:1, 3:1, and 4:1 shrink ratios), braided sleeving (fiberglass, PET, PVC, nylon, fluoropolymer), and non-heat-shrinkable tubing for fluid, chemical, fuel, pneumatic, medical, and food and beverage applications. Value-added services include tube cutting, custom coloring, printing, heat-forming, ribbed and custom profile extrusion, and thermal bonding.
The company sells primarily through direct, consultative, quote-based B2B sales, emphasizing engineering consultation via "Talk to an engineer" and "Request a Quote" pathways. It serves six end markets — automotive, aerospace, medical, appliances, industrial/commercial equipment, and leisure equipment — and holds relevant compliance certifications including ISO 9001 (continuously maintained for more than 20 years), FDA Title 21, NSF 51/61, MIL specifications, USP Class VI, UL, CSA, and EU ELV/RoHS directives. Go-to-market is single-channel: direct sales with no disclosed distributor or reseller network, supported by a content-rich website (now bilingual in English and Spanish) that serves as both a technical reference library and the primary inbound conversion surface. Pricing is fully quote-based and not publicly disclosed.
Grayline firmographics
Firmographics- Name
- Grayline
- Legal name
- Grayline LLC
- Website
- https://graylineinc.com
- Company type
- Private
- Founded year
- 1966
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Grayline LLC is a privately held Waukesha, Wisconsin manufacturer of custom flexible polymer tubing and heat-shrink products, serving automotive, aerospace, medical, appliance, industrial, and leisure equipment OEMs via direct consultative sales.
- Ownership category
- akta.pro rank
Grayline industry classification
Industry- Product category
- Polymer Tubing Manufacturing
- NAICS
- Rubber and Plastics Hoses and Belting Manufacturing (326220), Rubber and Plastics Hoses and Belting Manufacturing (32622)
- SIC
- Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)
- akta.pro primary industry
- Industrial Hoses & Tubing (Rubber/Elastomer) (IMANALAA)
- akta.pro secondary industry
- Flexible Packaging Converting & Finishing (Slitting, Rewinding, Coating, Embossing) (IMALABAL)
Keywords
Where Grayline is headquartered
LocationHeadquarters
- HQ city
- Waukesha
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Grayline business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales
Revenue model
- Custom Polymer Tubing Products: Sale of specialty flexible tubing including heat-shrinkable, non-heat-shrinkable, and braided sleeving products. The company operates on a custom manufacturing model with short runs and rapid prototyping capabilities.
- Standard Stock Products: Off-the-shelf tubing products available in standard sizes and configurations for immediate delivery.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Custom tubing solutions with engineering consultation |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Grayline product offering
Product offeringCore offering
Grayline manufactures custom polymer tubing and heat-shrinkable tubing products for OEM and industrial customers across multiple industries. The company works with 110+ materials (PVC, TPV, silicone, fluoropolymers) and produces custom sizes from .02" ID to 1.6" using in-stock tooling, with thousands of size combinations and limitless color options. It complements its manufacturing with value-added services such as tube cutting, custom coloring, printing, heat-formed tubing, ribbed and custom profile tubing, and thermal tube bonding.
Product overview
Grayline is a custom polymer tubing and heat shrink manufacturer offering a comprehensive portfolio of specialty flexible tubing solutions. The core product lines consist of Custom Polymer Tubing (available in over 110 materials including PVC, TPV, silicone, and fluoropolymers), Heat Shrinkable Tubing (single and double-wall adhesive-lined options), Braided Sleeving (fiberglass, PET, and polymer-based), and Non-Heat Shrinkable Tubing (for fluid, chemical, fuel, pneumatic, medical, and food & beverage applications). These products are complemented by Custom Tubing Solutions services including cutting, coloring, printing, heat-forming, and bonding. The company emphasizes rapid prototyping, short lead times, and custom size/color combinations, positioning its offerings as nearly economical as stock options. The product line spans applications across automotive, aerospace, medical, appliances, industrial equipment, and leisure equipment industries.
Differentiator
Problem solved
Functional benefit
Products and services
- Custom Polymer Tubing
- Heat Shrinkable Tubing
- Braided Sleeving
- Non-Heat Shrinkable Tubing
- Custom Tubing Solutions Services
Quantifiable outcome
- Custom sizes nearly as economical as stock options through use of in-stock tooling
Companies that use Grayline
Customer profileSegments6 records
Ideal customer profiles6 records
Grayline technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Grayline partnerships and signals
Strategic signalScale indicators4 records
Recent moves5 records
Expansion highlights5 records
Grayline competitors and assessment
Company assessmentBroad incumbents
- 3M: Manufactures heat shrink tubing, electrical insulation, and specialty polymer products across industrial, aerospace, and appliance end markets. Competes with Grayline in heat shrink and braided sleeving categories within a much larger product portfolio.
- TE Connectivity: Global leader in heat shrink tubing (Raychem brand), electrical insulation, and connector products serving aerospace, automotive, medical, and industrial markets. Competes with Grayline's heat-shrink and braided sleeving lines as part of a much broader portfolio.
- HellermannTyton (Aptiv): Global provider of heat shrink tubing, cable management, and identification products serving automotive, aerospace, and industrial OEMs. Direct overlap with Grayline's heat shrink and wire harness protection lines.
- Parker Hannifin: Diversified industrial manufacturer of hoses, tubing, and fluid-handling components for industrial, automotive, and aerospace applications. Overlaps with Grayline on industrial tubing, pneumatic/hydraulic, and aerospace fluid-transfer products.
- Teleflex: Medical device manufacturer with substantial polymer tubing offerings for surgical and interventional applications. Comparable to Grayline in medical-grade tubing qualifications (USP Class VI, FDA) though operating at significantly larger scale.
Direct peers
- Saint-Gobain Performance Plastics: Produces Tygon-brand flexible polymer tubing, hoses, and custom extrusions serving medical, pharmaceutical, food/beverage, and industrial customers. Closest large-scale analog to Grayline's custom polymer tubing and fluid-transfer focus.
- NewAge Industries: Manufacturer of flexible polymer tubing and hose (Tygon, PharMed, AdvantaPure brands) with custom and stock offerings across medical, food/beverage, and industrial applications. Highly comparable to Grayline in product breadth, custom focus, and target verticals.
- Nordson MEDICAL: Specialty manufacturer of medical-grade tubing, heat shrink, and fluid management components with strong custom extrusion capabilities. Closely comparable to Grayline's medical tubing and custom polymer extrusion lines.
- Zeus Industrial Products: Specialty polymer tubing manufacturer focused on fluoropolymers, heat shrink, and custom extrusion for medical, aerospace, and industrial markets. Directly overlaps with Grayline's material breadth (fluoropolymers, TPV, custom profiles) and regulated end markets.
Emerging players
- Masterflex (Avantor): Specialty manufacturer of peristaltic pump tubing and custom extruded polymer tubing for bioprocessing, laboratory, and industrial fluid handling. Niche overlap with Grayline's peristaltic pump and chemical/fluid transfer tubing offerings.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Grayline social profiles
Digital presenceGrayline compliance and trust
Trust signalCompliance1 record
Grayline financial estimates
Financial estimateRevenue estimate
Valuation estimate
Grayline leadership team
Management profileNumber of profiles
Grayline funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Grayline M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Grayline
What does Grayline do?
Grayline manufactures custom polymer tubing and heat-shrinkable tubing products for OEM and industrial customers across multiple industries. The company works with 110+ materials (PVC, TPV, silicone, fluoropolymers) and produces custom sizes from .02" ID to 1.6" using in-stock tooling, with thousands of size combinations and limitless color options. It complements its manufacturing with value-added services such as tube cutting, custom coloring, printing, heat-formed tubing, ribbed and custom profile tubing, and thermal tube bonding.
Is Grayline a public or private company?
Grayline is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Grayline founded?
Grayline was founded in 1966. It employs 11 to 50 people.
Where is Grayline based?
Grayline is headquartered in Waukesha, United States, in the North America region.
How does Grayline make money?
Two revenue lines are on record. Custom Polymer Tubing Products are the primary driver. The others are standard Stock Products.
Who are Grayline's main competitors?
Broad incumbents on record are 3M, TE Connectivity, HellermannTyton (Aptiv), Parker Hannifin and Teleflex. Direct peers are Saint-Gobain Performance Plastics, NewAge Industries, Nordson MEDICAL and Zeus Industrial Products. Masterflex (Avantor) is listed as an emerging player.
Does Grayline have an API?
No public API is recorded for Grayline.
What industry is Grayline in?
Grayline's product category is Polymer Tubing Manufacturing. Its primary akta.pro industry code is IMANALAA, Industrial Hoses & Tubing (Rubber/Elastomer), with a secondary code of IMALABAL, Flexible Packaging Converting & Finishing (Slitting, Rewinding, Coating, Embossing). Its NAICS code is 326220 and its SIC code is 3050.