When it comes to footwear bonding, not all glues are created equal—and definitely not all soles are. From ultra-light orthopedic designs to rugged mountain boots, the Renia bonding system ensures every component sticks exactly the way it should. Whether you're working with Morflex, Megagrip, EVA, or TPU, here’s your go-to guide to match Vibram soles with the right glue and prep.

ORTHOPAEDIC PRODUCTS

(Diflex Light Gold, Vipod, Bio Extra Light, Vi Balance, Vi Plus, Ultra Comfort*)
Glue: Colle de Cologne (CDC)
Simple, strong, and reliable—CDC is your go-to for these light, cushioned bases.

MORFLEX – NEWFLEX – GUMLITE – EVA

Glue: CDC (NO Syntic Total)
Additive: 5% Hardener

These lightweight, shock-absorbing materials need a flexible bond. Avoid Syntic Total on EVA—use CDC with hardener instead.

MEGAGRIP – IDROGRIP – ARCTIC GRIP – CLIMBING SHEETS – XS CITY – ECOSTEP – AIRSOFT – MONT – TRONT

 Prep:  Halogen – 15 mins
 Glue:  Syntic Total (for technical boots)
           CDC (for city use)

Rugged or urban, the key is halogen prep followed by the right glue based on the shoe’s purpose.

LITEBASE

With EVA Midsole: Halogen – 15 mins – CDC
With Other Materials: Halogen – 15 mins – Syntic Total

Light in weight, but the bond must be strong. Match glue to the midsole.

TPU & PVC VARIANTS

TPU – PVC: R+L Primer – 15 mins – Syntic Total
Foam TPU: Primer PUR – 15 mins – Syntic Total
Compact TPU: Halogen – 15 mins – Syntic Total
PVC (general): Acetone – 15 mins – CDC or Syntic Total

Surface prep is everything. Don’t skip the primers or solvents, they make or break your bond.

TECH MATERIALS

Nylon – PA – Grilamid – Pebax: Halogen – 15 mins – Syntic Total + 5% Hardener
Carbon: CDC + 5% Hardener

These modern materials need serious adhesion—think hardener-enhanced bonding systems.

TRADITIONAL SOLE MATERIALS

Crepe: CDC
Tunit: Halogen – 15 mins – Syntic

Classic materials, classic treatment. Simple and effective.

⚠️ PSA: EVA ≠ Syntic Total

Never use Syntic Total on EVA—it’s a mismatch. Stick to CDC + hardener for a bond that lasts.

To Sum it up…

The Renia system isn’t just about glue—it’s chemistry, prep, and precision. The right combo means the difference between a repair that fails in weeks and one that’s returned to you for a new sole once it’s worn down. So next time you’re wondering “Which RENIA glue is right for this shoe?” — now you’ve got the answer.