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GRP Weatherproofing
Bob da builder - 4/12/04 at 08:23 PM

hey up

can any body recommend any products that can be applied to the underside of GRP to seal the fibres from water etc.... as im intending to use my car all year so dont want it blowing off in the frost!!!

i have seen some rubber soloutions to stop stones causing spiders legs on the upper surface.... any comments on this project!!

cheers

bob

macspeedy - 4/12/04 at 08:43 PM

wonder seal svc i think

Mark Allanson - 4/12/04 at 08:45 PM

I'm going to use brushable seam sealer, its PU, and best stuff you can get for the job

macspeedy - 4/12/04 at 08:52 PM

http://www.nfauto.co.uk/wunderseal.htm

Hugh Paterson - 4/12/04 at 09:20 PM

Bob, best thing to seal the surface is "Flowcoat" 50% gelcoat +50% General purpose resin mixed together. Two thin coats, second applied as the first un goes throught the green stage. If the layup has been done correct and the CSM is well wet through and laminated properly it shoudnt need weather proofing though Tust me I aint had a failure or osmosis on my stuff in 30 years.
Shug.

paulbeyer - 5/12/04 at 09:16 AM

quote:
Originally posted by Mark Allanson
I'm going to use brushable seam sealer, its PU, and best stuff you can get for the job


Mark please tell me more. Where what when and how much?

Peteff - 5/12/04 at 10:02 AM

I got a catalogue from Frost yesterday. They have it.
http://www.frost.co.uk/item_Detail.asp?productID=8323

Mark Allanson - 5/12/04 at 05:15 PM

quote:
Originally posted by paulbeyer
quote:
Originally posted by Mark Allanson
I'm going to use brushable seam sealer, its PU, and best stuff you can get for the job


Mark please tell me more. Where what when and how much?



Most motor factors have it, it is normally about £12 for a litre tin. It has the consistency of clotted cream and cures to a hard rubbery feel. It will stop stone chipping or and capilliary osmosis.

givemethebighammer - 5/12/04 at 06:44 PM

how does it stick to GRP and aluminium ? I'm thinking of perhaps doing the entire underside of the car with something like this. Last thing I want is the stuff peeling off.

Mark Allanson - 5/12/04 at 10:06 PM

quote:
Originally posted by givemethebighammer
how does it stick to GRP and aluminium ? I'm thinking of perhaps doing the entire underside of the car with something like this. Last thing I want is the stuff peeling off.




basically it is tiger seal in a tin, it will stick to ANYTHING

Avoneer - 5/12/04 at 11:00 PM

I got some "grey stuff" from Halfords. Oily thick black sticky shit. Cheaper than all the rest and did the job on my car.
Pat...

Mark Allanson - 5/12/04 at 11:42 PM

known in the trade as 'black dog sh*t', normally used by bodgers to disguise bad patch welding.

It tends to crack in time, and impossible to remove

indykid - 6/12/04 at 12:05 AM

quote:
Originally posted by Avoneer
I got some "grey stuff" from Halfords. Oily thick black sticky shit. Cheaper than all the rest and did the job on my car.
Pat...


probably a bit daft sice i work there, but what was that? didn't know we had owt like that.

i found a brand new tube of sikaflex in the warehouse the other day. not on the stockfile, but don't remember it ever being a stocked line. one to me
tom