Unibond PVA for sticking up headlining????

A waterproof PVA wood glue is definitely the stuff for sticking it onto ply panels.

Not so sure that it will be so good onto GRP though. I think a high temperature solvent base contact adhesive my still be the best option there.

I used the PVA as above but an impact adhesive on the grp with a spray on adhesive on the back of the foam.. All as recommended and supplied by Hawke House

I'd go with whatever HH recommend. If there is a water based alternative to the solvent base stuff go for it because with the solvent good ventilation AND an organic vapours mask are essential. It's deadly otherwise.
 
I agree with Vic. PVA is excellent for sticking to panels for several reasons.
1. It does not attack the foam back of the Vinyl
2. It is non volatile and easy to use
3. There are no unpleasant vapours

Unfortunately it has little hold when wet so can only be stuck downhand to panels you screw in place afterwards. For sticking direct to roof, spray contact adhesive is unfortunately still the only alternative.
 
various MSDS (safety sheets) give the melting/boiling point as 100 to 105 C. It is not impossible for deckheads and fittings to reach this temp, so a high temp system should be used, or you will find, as I did, that something stuck up becomes something unstuck.:mad:
 
sarabande said:
various MSDS (safety sheets) give the melting/boiling point as 100 to 105 C. It is not impossible for deckheads and fittings to reach this temp, so a high temp system should be used, or you will find, as I did, that something stuck up becomes something unstuck.:mad:
Click to expand...

These temperatures might be possible behind the stove flue or above the stove ..... but would you want vinyl there? I suspect the vinyl would distort at this sort of temperature too.

I, like most people have sat on vinyl that has been sitting in the sun ..... but I doubt if it was much above 60 deg C .... and I experienced no burns or blisters.
 
OK, fair point, but do I recall seeing a post about eggs cooking on someone's deck ?

When we get round to having a summer, I'll borrow an infra-red thermometer and check out the temps that occur on parts of the boat. If you can't wait, I'd be happy to carry out the experiment for you. Would the Seychelles be OK ? :)


EDIT. A bit of useful info for TWS.

How hot an object really gets depends on the albedo of the object: on how much of the arriving radiation is reflected immediately. Such reflected radiation does not heat up the object. For example, if the object immediately reflects 50% of the incoming radiation, then its greatest attainable temperature will be 332 K = 59 degrees Celsius.

The temperature also depends on the shape and orientation of the object. A horizontal plate can (with the Sun overhead) reach 123 degrees Celsius, but a vertical plate at most 100 degrees Celsius. A cube gets to 108 degrees Celsius, and a sphere to 95 degrees.

Source: http://www.astro.uu.nl/~strous/AA/en/antwoorden/temperatuur.html#v44

EDIT 2

Some work on solar heating of cars (but in Fahrenheit). Surface temperatures up to 181F

http://www.hprcc.unl.edu/nebraska/hot-in-the-car.html

and from another source

Water Temperature Time to Cause a Bad Burn
66°C (150°F) 2 seconds
60°C (140°F) 6 seconds
52°C (125°F) 2 minutes
49°C (120°F) 10 minutes
 
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