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Step 5Rough Up and Cut Out Patches
Use sandpaper to rough it up.
DEGREASING
If your patch comes from a shower curtain it will be greasy and you'll have to de-grease it first.
If the mattress or patch are new you'll also need to degrease them by scrubbing with detergent. Plastic things come coated with some kind of oily stuff to keep them from sticking together in transit.
You've de-greased it enough if water sheets out on it. If the water beads up, degrease it some more. You can also do that by wiping it off with alcohol or the nasty greaseless solvent of your choice. Not Gasoline. It's oily.
SOURCES OF PATCH MATERIAL
My patches came from a totally shot air mattress.
In the past I've cut patches from shower curtains and a raincoat.
Any thin flexible sheet of PVC will be fine.
MATERIAL COMPATIBILITY
PVC won't stick to urethane and vice versa. In the U.S. most flexible plastic things are PVC.
That may be different in Europe due to health regulations.
SHAPE AND TAPER
Rounded patches are easier to stick down. If a patch has corners they tend to peel up.
In the past I've tried sanding the edges thin so they would taper down and stretch with the surrounding material better. That's worked well but usually isn't necessary.
DEGREASING
If your patch comes from a shower curtain it will be greasy and you'll have to de-grease it first.
If the mattress or patch are new you'll also need to degrease them by scrubbing with detergent. Plastic things come coated with some kind of oily stuff to keep them from sticking together in transit.
You've de-greased it enough if water sheets out on it. If the water beads up, degrease it some more. You can also do that by wiping it off with alcohol or the nasty greaseless solvent of your choice. Not Gasoline. It's oily.
SOURCES OF PATCH MATERIAL
My patches came from a totally shot air mattress.
In the past I've cut patches from shower curtains and a raincoat.
Any thin flexible sheet of PVC will be fine.
MATERIAL COMPATIBILITY
PVC won't stick to urethane and vice versa. In the U.S. most flexible plastic things are PVC.
That may be different in Europe due to health regulations.
SHAPE AND TAPER
Rounded patches are easier to stick down. If a patch has corners they tend to peel up.
In the past I've tried sanding the edges thin so they would taper down and stretch with the surrounding material better. That's worked well but usually isn't necessary.
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