OATMaster Silicone Hose for OAT Coolants
OATMaster is a silicone coolant hose designed for OAT (organic acid technology) coolants and hot engine bays in heavy-duty and commercial engines. Lake Hose Products supplies it wholesale to US distributors and OEMs, alongside coolMaster hose.
Why Fleets Are Switching to OATMaster
Built for long-life OAT coolants and hot engine bays.
Made for OAT Coolants
Developed for the new generation of OAT coolants, with an inner barrier liner designed to resist the acids and gases they carry.
Silicone Built for High Heat
High-grade silicone made for hot engine bays and heavy-duty cycles in trucks, buses, off-highway equipment and other commercial fleets.
Wholesale to Distributors & OEMs
Lake Hose Products sells exclusively to distributors and OEMs. End users can contact us for a referral to a distributor.
OATMaster Silicone Hose: Specifications
OATMaster was developed for OAT coolants in engines where higher under-hood temperatures rule out conventional EPDM rubber hose. Lake Hose Products is a US wholesale distributor.
- Black internal barrier liner that virtually eliminates permeation and resists OAT coolant acids and gases
- Inside diameters 1/4 in to 2.75 in
- Straights, straight reducers and 45°, 90°, 135° and 180° elbows, plus custom shapes
- Custom sizes: email us or see the part numbers
- Violet standard; other colors on request
Per the manufacturer's published product information. Confirm fitment for your application.
Request a QuoteOATMaster Part Numbers
15 stock part numbers: straight hose from 1/4 in to 2.5 in inside diameter in 12 ft lengths, plus 45° and 90° elbows.
Custom sizes are available on request. Need a size or shape that isn't listed? Email us about a custom size.
Distributor Support
We sell OATMaster exclusively to distributors and OEMs.
- Net terms for qualifying distributors
- Quick quotes and responsive sales support
- Part numbers, literature and product information for your team
- End-user inquiries referred to you
Or call 419-750-2350 | email sales@lakehoseproducts.com
OATMaster is manufactured by hydraPower dynamics. Lake Hose Products is a US wholesale distributor.
Who We Serve
OATMaster is used in heavy-duty and commercial engines running OAT coolant, from trucks and buses to off-highway equipment and fire apparatus. We sell through distributors; contact us and we'll refer you to one.
Fleets & Fire Departments
Keep trucks, buses and apparatus in service with hose made for OAT coolant systems. Contact us and we'll connect you with a distributor.
Repair & Aftermarket Garages
Emergency vehicle and heavy-duty shops can source OATMaster through a distributor for customer repairs instead of substituting a general-purpose hose.
Municipal & Commercial Fleets
Municipal and commercial fleet managers can standardize on one OAT-compatible hose, sourced through a distributor.
Built for Heavy-Duty Engines Running OAT Coolants
OATMaster hose was developed for OAT coolants in modern heavy-duty engines, where higher under-hood temperatures rule out EPDM. Example applications include:
- Refuse & garbage trucks
- Ready-mix & cement mixers
- Construction & off-highway equipment
- Municipal & utility fleets (plows, utility trucks)
- Heavy-duty trucks
- Other industrial equipment running OAT coolants
Silicone Hose for OAT Coolant: Why It Matters
What Is OAT (Organic Acid Technology) Coolant?
OAT is an acronym for Organic Acid (Additive) Technology, the type of corrosion inhibitor used in long life and extended life coolants. These coolants are based on minimally depleting carboxylate technology that protects cooling-system components, including aluminum and magnesium found in modern engines. Unlike traditional coolants, they do not require regular additions of supplemental coolant additives (SCAs) at scheduled service intervals. In some heavy-duty diesel applications a coolant extender is used to top up additives at the coolant's half-life, typically around 480,000 km.
Why OAT Coolant Needs a Different Hose
Higher under-hood temperatures in modern engines rule out conventional EPDM rubber hose, and gases can permeate a standard silicone liner. OATMaster extended life coolant hose uses a black internal barrier liner that virtually eliminates permeation, so the hose lasts longer than standard silicone hose. The liner is highly resistant to potassium/sodium 2-ethylhexanoic acid, unlike a standard fluorosilicone liner.
How OATMaster Coolant Hose Is Built
- Impermeable inner liner: black internal barrier layer designed for OAT coolant acids and gases
- Reinforcement: multiple braids of bias-cut woven meta-aramid fabric
- Outer cover: high-grade silicone rubber to SAE J20; standard color violet, other colors on request
- Construction: standard envelope wrap, or strip wound for higher-pressure applications; classic wrapped cover finish
- Testing: independent lab testing with commercial OAT coolants (excellent resistance to gas permeation) and dynamic pressure testing to DIN 73411-2 certificated at 1 million cycles
Warranty terms are provided by the manufacturer. Confirm with the manufacturer before use: OATMaster.
OATMaster Coolant Hose for Heavy-Duty and Commercial Engines
The manufacturer developed OATMaster for commercial vehicles and Tier 6 engines running OAT coolants, and also markets it for rail applications (tested to EN45545-2) and advanced thermal management systems. Typical uses include trucks, buses, refuse and ready-mix trucks, construction and off-highway equipment, municipal fleets and fire apparatus.
Customers must verify suitability for their specific engine and application before ordering or installing.
Request OATMaster Pricing
Distributors and OEMs: email or call with hose sizes, quantities and application.
Before ordering, please verify the hose is suitable for your application (coolant type, temperature, pressure and installation). Confirm with the manufacturer before use: OATMaster.
Distributors & OEMs
Want to buy OATMaster for resale or OEM use, or carry it in your line?
Email a Distributor InquiryEmail sales@lakehoseproducts.com
Call 419-750-2350
No forms on this site; we only receive what you email us.