Hi all,

I need to make a large mold and am looking for a product and method available in the UK for sealing MDF. Previously,i have biscuit joined mdf and then routed and filled the join with car body filler. Then i have sealed the MDF with G4.

I have found it difficult to get the surface smooth and don't want to spray G4 as its pretty nasty stuff. Do you UK/Europe guys have any sealers that you would recommend that i could spray and would do the job. I'm thinking some sort of polyurethane?

Cheers,

Curt.

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Sorry I don't know what you have available in the UK but anything with zero water absorption should work...like a fiberglass resin, liquid plastics...etc...

Thanks for the reply Tom,

I have been using a sealer that i roll on and it works well, however i spend so much time rolling and sanding. I would spray it but it contains cyanates. Took me 2 days to prepare a casting surface, theres got to be easier ways.....

You should be ok to spray as long as you use a full face respirator.  Contact the manufacture about spraying and safety...

Curt Bell said:

Thanks for the reply Tom,

I have been using a sealer that i roll on and it works well, however i spend so much time rolling and sanding. I would spray it but it contains cyanates. Took me 2 days to prepare a casting surface, theres got to be easier ways.....

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