2MM Silicone Hose - Black - Sold by the Foot

Can I use this for coolant lines or just vacuum?

Silicone rated for engine bay handles coolant, vacuum, and light boost routing. Check your application temps—if you're routing direct radiator discharge or high-pressure boost over 15 psi, confirm hose wall thickness is adequate for your system pressure.

How do I connect this to my existing lines or fittings?

2mm hose pairs with compression fittings, push-to-connect barbed fittings, or hose clamps depending on your setup. You'll need appropriate barbed or compression ends to match your line diameter—those are sold separately.

Can I cut this myself and will it fray?

Cut cleanly with a sharp utility knife or hose cutter. Silicone won't fray like rubber—it'll stay stable at the cut end. Straight cuts work best for fitting insertion.