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Silicone bending cord for 3/8 inch rigid tubing

PrimoChill

PrimoChill 3/8in OD Rigid Tube Bending Cord diy cooling

SKU CH-W7NS-M2R9E

Silicone bending cord prevents collapse when heat-forming 3/8 in. ID rigid tubing for custom water-cooling loops

  • Tube size3/8 in OD (For 3/8 in.ID Tube)
  • Product typeCPU Block
  • Prevents tube collapse during complex bends
  • Solid silicone cord withstands high bending heat
  • Tight fit eliminates kinks and air pockets
  • Designed for 3/8 in. ID acrylic or PETG tubing
  • Three-foot length covers multiple bend projects

PrimoChill 3/8in OD Rigid Tube Bending Cord

The PrimoChill Rigid Tube Silicone Bending Insert Solid Cord is designed for DIY liquid-cooling builders who work with 3/8in ID acrylic or PETG tubing. It sits inside the tube during heating to prevent the rigid tube from collapsing, kinking or forming air pockets and flat spots on complex bends. This tool is not for builders using soft tubing or tubing with a different inner diameter.

3-foot solid silicone cord for tight bends

The single 3-foot piece is made from durable silicone that stretches and lubricates for a tight fit inside the rigid tube. A tighter fit reduces the likelihood of surface cavities along the bend radius, making it suitable for more intricate routing. The solid construction is harder to remove than a tubed insert and cannot be stretched as far, limiting its reusability on very long continuous runs.

Replaces improvised or tubed bending inserts

This cord upgrades from makeshift internal supports or hollow bending inserts that can allow tube collapse on tight radii. The jump is worth it when a build demands multiple complex bends in 3/8in ID rigid tubing and the builder accepts a more difficult removal process for a cleaner result. It does not suit installations where rapid insert removal or maximum stretch length are priorities.

How it compares

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

Price $13.99
Cheaper than about 60% of the 609 comparable items (median $15.99).

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Specifications

Product
Product typeCPU Block
Size & build
Tube size3/8 in OD (For 3/8 in.ID Tube)

Questions about this item

Will this 3/8in OD bending cord work with the 3/8in ID acrylic tubing I already own?

Yes, the cord is designed specifically for 3/8in ID acrylic or PETG rigid tubing. It fits tightly inside to prevent collapse, kinking, air pockets and flat spots during heated bending.

How can I tell the cord is seated correctly before I heat the tube?

The insert must feel very tight and require stretching plus lubrication to install. A loose fit means the tube will collapse when bent; the tighter the fit, the cleaner the bend radius.

Does the package include lubricant or tools, or must I source them separately?

The box contains a single 3-foot solid silicone bending cord only. Lubricant for insertion and a heat source for bending the rigid tube are not included and must be purchased separately.

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