Since there has been so much talk about seams showing through MDF. I am going to do some experimenting with different methods used to seal it. I am going to put together some test samples to try different techniques side by side to see what works the best, easiest to apply and the least expensive method.
From what I have read seems most everybody agrees the inside should be sealed as well. To keep it simple I am going to glue up a 90 degree joint and seal all sides.
The methods I have so far will be:
1. Tight bond glue thinned 60/40. I have not done this method, so chime in on this one. I figure at least two coats more on the edges as it soaks in.
2. Bin 123 white pigmented shellac. Two coats more on the edges until it stops soaking in.
3. Waterborne automotive primer. Two coats more on edges until it stops soaking in.
4. Fiberglass resin. Not sure on coats. Haven't tried this method yet. Probably two with more on the edges.
Does anybody want to add a method to the list they think works well?
I am also going to try baking the moisture out of the MDF first to see if that makes a difference.
I am going to stop at the local granite company to see if they have any scrap pieces of moisture resistant MDF. I have seen a lot of this being used as backer for granite, marble and solid surfaces in kitchens and bathrooms.
Dave
From what I have read seems most everybody agrees the inside should be sealed as well. To keep it simple I am going to glue up a 90 degree joint and seal all sides.
The methods I have so far will be:
1. Tight bond glue thinned 60/40. I have not done this method, so chime in on this one. I figure at least two coats more on the edges as it soaks in.
2. Bin 123 white pigmented shellac. Two coats more on the edges until it stops soaking in.
3. Waterborne automotive primer. Two coats more on edges until it stops soaking in.
4. Fiberglass resin. Not sure on coats. Haven't tried this method yet. Probably two with more on the edges.
Does anybody want to add a method to the list they think works well?
I am also going to try baking the moisture out of the MDF first to see if that makes a difference.
I am going to stop at the local granite company to see if they have any scrap pieces of moisture resistant MDF. I have seen a lot of this being used as backer for granite, marble and solid surfaces in kitchens and bathrooms.
Dave
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