FAQ - Frequently Asked Questions

Which magnets are suitable for geocaching?

Table of Contents

Fastening caches magnetically

Fastening micros magnetically

Many geocachers would like to use magnets to attach micros (small film canisters containing a log book and pen) under bridges, guard rails or other metal hiding spots. Please keep in mind that neodymium magnets are not designed for outdoor use because they will eventually rust.
Geocaching micro magnetically attached with a disc magnet on the inside
A S-10-05-N disc holds a film canister and three pens in place with no problem.
According to our customers, a magnet must have the following features to fit into a micro (typically 3,2 x 4,5 cm).
1. Round and flat.

There is no one-size-fits-all solution. The first requirement is best fulfiled by our disc magnets S-10-03-N, S-10-04-N or S-10-05-N. They are so small that they can be glued next to the hump in the bottom of the canister. As an alternative, you can use strong adhesive tape to attach them to the side wall of the canister.
2. Bore hole or cavity in the center

The second requirement is met by small countersunk disc magnets because they can be placed flush over the hump on the bottom of the canister. We recommend gluing the magnet to the bottom of the canister. It is very difficult to attach it to the round canister wall. Since not many adhesives are dependable on plastic and magnets, attach the magnet with a strong adhesive tape.
Geocaching micro with a magnet attached to the outside
Picture from our customer application project99 (available only in German)
If you choose to attach the magnet to the outside of the micro, you may use the following method. Our customer Thomas Mönkemeier came up with a sturdy solution that works well. He used round containers from the lab. These containers have the advantage that contrary to film containers they are water-proof. He attached the magnet to the outside with a heat shrink tube. To prevent the magnet from shifting during the shrinking, he put some adhesive tape under the magnet. He also used scissors to keep the magnet in place to avoid burning his fingers. Important: During the shrinking process, the temperature must not be higher than 80 degrees - otherwise the magnet will lose its magnetic force.
We recommend, therefore, to put the magnet on the inside of the micro to protect it from corrosion and blows.

Fasten small to large caches with magnets

For larger caches (small to large) you should attach several magnets on the inside of the canister. Depending on the size, weight and thickness of the cache, flat discs or block magnets are suitable.

Magnets for attaching lighter caches

Magnets for attaching heavy caches

Bartering objects in caches

Magnets are good bartering objects for larger caches that are not attached to anything with magnets. We recommend small neodymium magnets in their original packaging (plastic bag), since this protects them from corrosion.
Select one of these bestsellers:

Geocaching magnet

At a certain difficulty level, caches can also be found in tubes. There is no other way to get to the cache but to "fish" for it with a magnet. Therefore, our customer Nandi gave his nephew (a passionate geocacher) a magnet for his treasure hunt.
For that purpose, he ordered THE GIANT from us. Since the magnet by itself is rather unwieldy, he built a steel casing for it. He went to a metal worker who fabricated the casing for him. The magnet is now embedded in epoxy resin in this steel casing and can be moved with a mountaineering cord.
If you don't want to go through all this trouble, you can just order a practical treasure hunt magnet with an adhesive force of 30 kg in our online shop.