F.A.Q. How Do I Make My Own Speargun Rubbers?

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F.A.Q. How Do I Make My Own Speargun Rubbers?

Making your own speargun rubbers is a very easy process to learn. In fact once you have mastered the technique many spearos actually prefer to make their own rubbers over buying commercially available pre-made rubbers. So why would anyone want to make their own rubbers? Simply put it is much cheaper and more convenient. By making your own rubbers you can also tweak your guns to customise how you want them to perform. Many spearos find that once they have made a few rubbers and tested them out that they eventually come up with their own lengths and spear combinations that shoot well for their individual needs. Below we will go over how to make your own power bands with a single Dyneema bridle. Making your own rubbers can cost you as little as $15 and its made how you want it, now why would you pay upwards of $30 for someone else to make a rubber up when you can do it yourself? Before we get started let's look at what you will need.


In order to make your own speargun rubbers you will need the following materials: (We have provided links for your convenience if you don't already have these parts)

When buying your own lengths of speargun rubber we recommend considering buying your bulk rubber in 2 metre lengths to minimise wastage and maximise the number of rubbers you can produce. With your bridle you will need to decide on what sort of bridle you wish to use, Dyneema, stainless steel trace or wire are all popular choices. There are also several types of bridles out there including: single wishbones or double wishbones. With regard to the bridle bead we recommend purchasing a high quality bridle bead to handle the heavy work and force which will be applied on it. When selecting your constrictor line we are yet to find a product that is as easy to use or as reliable as the Rob Allen Constrictor Line. When choosing a bridle making tool we again recomend going with a dependable tool that is simple to use, reliable and lightweight for travelling. For this we have had great success with the Rob Allen Wishbone Tool and we strongly recommend them. A little hint we have learnt over the years is that by using a wishbone applicator tool to complete the task not only will it save you time but it will also save your knuckles!For more information on how to select the correct size of rubber for your project please see our FAQ section on What size spear gun rubbers do I need?

Making your own speargun rubber:

The first step is making the bridle for the rubber. There are several types of bridles out there including, single dyneema, double dyneema and quick change bridles.

To make a simple single dyneema bridle you will need 7 inches of dyneema & two bridle beads.

This is what we have worked out to be the best length for our bridles once they are made. With dyneema we recommend that you try and get Rob Allen or genuine South African dyneema not the cheaper Pelaj copy which won’t last more than a few dives.

Starting with your 7 inches of dyneema tie a figure of 8 knot in one end and then slide two bridle beads onto the dyneema with the counter bore facing out and tie a figure of 8 knot on the other end.


Pull these knots tight and burn the ends of the dyneema. Congratulations! You've just made your first bridle.

Now cut your rubber to the desired length. For a 1m gun we use 55cm of 16mm rubber. We find this throws the shaft nicely and doesn’t blow your fish apart. To cut the rubber you can either use a good sharp pair of scissors or roll the rubber back and forth with a sharp knife.

To insert the bridle into the rubber use a decent squirt of silicone spray/gel down the core of the rubber. We find that by lubing/spraying inside the rubber and on the bridle bead and insertion tool it makes the whole process much easier. In addition it is worth noting that on the inside of most rubbers is a light coating of talcum powder which causes friction and makes the process much harder if not well lubricated. Using your bridle insertion tool simply put each end of the bridle into the rubbers.


Once the bridle is sitting inside the rubber all that is left to do is for you to tie them off.

Using some Rob Allen Constrictor Line tie a constrictor knot about 4mm from the end of the rubber. This is a very simple knot and a variant of the clove hitch knot. If tied properly it won’t come undone. Be careful not to pull it too tight however as you will be able to cut through the rubber if you severely over-tighten the knot.



Now spray this knot with a good amount of silicone spray. With the two slack ends of the knot tie a loop in each end and grab two screw drivers and pull the knot tight.

Cut off the long ends of the constrictor knot and give them a quick burn with a lighter. Remember to wipe excess silicon spray off the rubber before using a lighter, as it is quite flammable. Congratulations that’s it! You should now have something that resembles that $30+ piece of equipment you bought a while back.


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