High on the Mountain Top
Join Date: Oct 2005
Location: Qualicum Beach, BC, Canada.
Interest: general mountaineering/ hiking/ backpacking/ skiing/ kayaking
Nikwax makes a product called Map Proof. It's a water based silicone product that comes in 125 ml bottles, for about $10 per bottle and will do about two topo maps.
As well as waterproofing the paper, it also makes the paper more supple and folds don't get ratty and wear through like untreated paper. The applicator tip on the bottle is useless and I just cut the top off and brush it on with a foam brush. the product goes further and applies faster with a foam brush.
The rub is the big price for a little bottle, as we all know that packaging is costly. I wrote the company a few years ago to see if I could buy the product in a larger quantity, like a litre. They replied that it would be available in a 5 gallon bucket for a small fortune, so I dropped the pursuit.
The product is thin and white, like skimmed milk and resembles some of the water based urethane's that are for wood finishes, which I may experiment with on paper.
Any how, if anyone knows a better cheaper way to waterproof paper, let me know. I'm restoring an old summit register from the Golden Hinde and waterproofing it's pages, so it can go back to it's rightful place on the summit.