Used to add water resistance to canvas, tarps, and non-safety rope so gear sheds rain and snow when commercial waterproofing sprays are not available.
Camphor shaved into paraffin wax creates a simple, long shelf life coating. The wax blocks moisture, while camphor adds mild pest deterrence for stored gear. You do not need camphor for basic waterproofing, but adding it helps deter insects, slow mildew, and keep the wax a bit more flexible, which is useful for gear that lives in storage or harsh conditions.
Ingredients
- 8 parts paraffin wax, shaved or grated
- 1 part camphor block, finely shaved
- Optional: small amount of mineral spirits or high proof ethanol to thin
- Heat safe metal can or glass jar
- Medium pot for a simple double boiler
- Natural fiber canvas, tarps, or non-safety rope
- Brush or rag for application
How to Use It
- Fill a pot with a few inches of water and bring to a gentle simmer.
- Place shaved paraffin and camphor in a heat safe can or jar, then set it in the hot water.
- Stir occasionally until fully melted and blended. Remove from heat.
- For a thinner, brushable mix, stir in a small amount of solvent away from open flame.
- Lay out clean, dry fabric or rope.
- Brush or rub on a thin, even coat, working it into the fibers.
- Warm the treated item in the sun or near low heat so the blend soaks in and smooths out.
- Let cool and cure fully before heavy use or storage.
Warnings
- Do not use on climbing, rescue, or other safety rated rope.
- Keep hot wax and solvent away from open flame and high heat.
- Test on a small area first; darkening and some stiffening are normal.
Storage & Shelf Life
- Store leftover blend in a sealed metal or glass container.
- Keep in a cool, dry place out of direct sun.
- Paraffin and camphor are long lasting; remelt and use if color, texture, and smell remain normal.
When to Use It
- On canvas tarps, packs, covers, and work aprons that live outdoors.
- On non-safety ropes used for tarps, tie downs, and general homestead tasks.
- To refresh older fabric gear before wet seasons or extended storms.
- In off grid or field setups where you want durable, low tech water resistance.