Gates Heater Hose 5/8" ID 6 ft Safety Stripe EPDM — High-Temp, Coolant-Resistant

Gates 28491 Safety Stripe is a 6-foot, 5/8" inner diameter EPDM heater hose built for passenger cars and light trucks that resists high temperatures and most coolant chemistries for long service life.

This heater hose is designed for cooling and heater-system use on cars and light trucks. Constructed from EPDM rubber, it handles wide temperature swings and resists degradation from conventional coolants and non-oil-based additives. It meets SAE 20R3 Standard Wall Class D-2 requirements and is rated for typical automotive cooling-system pressures; it is not intended for fuel or oil transfer nor for heavy-duty commercial equipment.

How does this hose hold up to heat and climate extremes?

The Gates Safety Stripe hose uses EPDM compound formulated to withstand prolonged heat exposure without rapid hardening or cracking. It operates across a broad temperature window so it can tolerate winter cold and sustained engine heat during summer driving.

• Temperature range: -40°F to +257°F (-40°C to +125°C)
• EPDM construction resists ozone and heat aging
• Suitable for long-term exposure to engine bay temperatures

Will it work with my vehicle’s coolant and additives?

This hose is compatible with most automotive coolants and non-oil-based coolant additives, which makes it a good match for standard passenger-car and light-truck systems. Avoid using it with oil-based additives or for fuel and oil transfer applications.

• Unaffected by most ethylene- and propylene-glycol coolants
• Not recommended for oil-containing or petroleum-based fluids
• Do not use for fuel lines or oil transfer — safety caution included

What size and pressure rating should I expect?

The Gates 28491 is delivered as a 6-foot length with a 5/8" inner diameter, sized for common heater and coolant line replacements. It’s engineered to meet SAE 20R3 wall specifications and is suitable for typical passenger vehicle cooling pressures.

• Dimensions: 5/8" ID × 5/8" OD × 6 ft length
• Meets SAE 20R3 Standard Wall Class D-2
• Rated for typical 60 psi automotive cooling system pressures

How easy is it to install and maintain?

Installation is straightforward with standard hose clamps and basic hand tools; the flexible EPDM material cuts cleanly and fits most heater valve and core connections. Routine visual inspection and secure clamping will keep the hose performing reliably for many miles.

• Cut to required length with utility knife or hose cutter
• Use corrosion-resistant hose clamps for best sealing
• Inspect for cracks, bulges, or soft spots during service intervals

Who is this for: The Gates 28491 Safety Stripe heater hose is aimed at do-it-yourself mechanics, independent repair shops, and fleet owners replacing heater and coolant hoses on cars and light trucks. Choose this hose when you need a cost-effective, heat-resistant EPDM line that complies with SAE 20R3 standards — but select heavy-duty Green Stripe hose for heavy commercial or off-road equipment and never use this product for fuel or oil lines.