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PrimoChill solid silicone bending cord for 1/2in OD rigid tubing

PrimoChill

PrimoChill 1/2in. OD Rigid Tubing Bending Cord diy cooling

SKU CH-KNJF-Q4PS4

Solid silicone insert prevents collapse when heat-bending 5/8 in. ID acrylic or PETG rigid tubing

  • Tube size1/2 in OD (For 1/2 in.ID Tube)
  • Product typeCPU Block
  • Solid silicone cord prevents tube collapse during complex bends
  • Tight-fit design eliminates kinks, air pockets and flat spots when heated
  • Compatible with 5/8 in. ID acrylic or PETG rigid tubing only
  • Single 3-foot length supplied for custom cutting to required size
  • Reusable insert stretches for installation then removes after bending cools

Bending Cord for 1/2in. OD Rigid Tubing

The PrimoChill bending cord is a solid silicone insert designed for 1/2in. OD rigid tubing with a 1/2in. ID. It supports DIY liquid-cooling builders who need to form complex acrylic or PETG tube runs without kinks or collapsed walls. The cord provides internal structure while the tube is heated and shaped. It is sold as a single three-foot piece.

Thermals Noise and Power Draw

This accessory has no active components, so it produces no noise and draws no power. It does not affect coolant temperatures or flow resistance once removed after bending. The silicone material withstands the heat required to soften rigid tubing during the forming process.

Upgrade Path and When It Is Worth It

The cord replaces improvised mandrels or hollow inserts that can leave flat spots or internal cavities in tight bends. Builders attempting complex multi-plane routes will benefit from the solid core's consistent support. It is not suited for tubing sizes other than 1/2in. ID or for users who prefer a hollow insert that is easier to remove.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 65% of the 609 comparable items (median $15.99).

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Specifications

Product
Product typeCPU Block
Size & build
Tube size1/2 in OD (For 1/2 in.ID Tube)

Questions about this item

How do I install the solid silicone bending cord into 5/8 in. ID rigid tubing without kinking it?

Stretch the cord first, trim any unstretched excess, ream the tube ends with an RFB tool, lubricate both surfaces, then push the cord in slowly; the tight fit prevents collapse during heating but requires patience.

What upkeep does the 3-foot solid silicone cord need after repeated bending sessions?

Wipe residue off after each use, inspect for surface tears or permanent deformation, and replace the cord if it no longer stretches evenly or leaves marks inside the tubing.

At what point does the solid cord become the limiting factor during a long bending job?

The cord cannot be stretched as far as a hollow insert, so on very tight radii or extended lengths it will resist removal first, risking tube damage if forced.

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