How to Glue Delrin

Delrin, has a lot of great properties as a plastic. It machines great. It is non corrosive. It can even be laser cut. However, it has a major drawback. Which is that it is tricky to glue together. For the same reseasons that it stands up to most solvents mean that is not going to be effected by most glues.

However, it turns out there is a great glue that does the trick.

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Step 1: Prepare You Pieces for Glueing

Before you glue your pieces of derin together you will want to pre pare them. First scratch up the surfaces with some sand paper. This is known as giving the material "tooth." the roughsurface will help the glue find places to hold on to.

Step 2: Apply Glue

Go2 glue from locktite works great for bonding derin together. Use a drop on the surface. Then press the two pieces together and clamp. wipe off the excess glue. Wait a few hours and your are done.

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    5 Discussions


    9 months ago

    According to Loctite's Design Guide for Plastic Bonding, Delrin, Celcon and other Acetal Homopolymers can successfully be bonded using Loctite 770 Primer, then Loctite 401 Adhesive. The guide also recommends the use of an accelerator due to the surface of acetals being so dry. I haven't tested it yet, but I am in the coming week, so here's hoping.


    3 years ago

    The instructions for Go2 from Loctite specifically state that it is not recommended for applications where one or both surfaces are non-porous, which Delrin is. Can you post how you tested that joint? You need to try twisting the disks apart with a firm twist in your hands and whacking it from the side with a sharp rap. Glue joints made between Delrin pieces are notoriously brittle. Any superglue will stick those two disks together, but the joint won't be able to withstand even a slight shock or twist.


    4 years ago on Introduction

    Go2 is _not_ the correct adhesive for Delrin. Acetal plastics need special purpose bonders. Loctite sells Epoxy Plastic Bonder ( for Delrin.


    4 years ago

    I have recently done this. However... for my purpose it did not survive either of uses. It broke when I tried to machine it and when I used it on my bench press , pressing bearing races. Kinda hurts when those pieces fly.... LOL


    4 years ago on Introduction

    Does that hold up to the rip-apart-after-the-glue-dries-test? Things may initially be stuck together but if you twist or wedge the pieces, they just come apart at the seams.