www.TK560.com

Transformer · Newbie Joined: 27 Nov 2008 Posts: 6 Location: Canada

Let me put in a good word for MDF. We use it frequently for molds. All molds are sealed using S1 Sealer from System 3. This is a 2 part epoxy containing solvents. A minimum of 3 coats are needed as this stuff really sinks in. It will give you a reasonable number of pulls. We also frequently use particle board, petrified with S1 Sealer, and have molds that have yeilded several hundred pulls of 1/8 ABS with no deterioration. We usually wipe the molds down with a high temperature wax to aid release.

Transformer

jdougn · Posted: Tue Jul 14, 2009 8:13 am Post subject: Re: MDF

jdougn

Appears S1 Sealer is not available in the USA. Any other suggestions? I noticed they do have a Clear Coat would it be the same or similar?
DougN

Transformer · Newbie Joined: 27 Nov 2008 Posts: 6 Location: Canada

For S1 Sealer you may have to talk to a System 3 distributor or directly to System 3. We are a System 3 distributor and have still been able to get it. The product was developed by Industrial Formulators, a Canadian company taken over by System 3, and a lot of the Industrial Formulators products are being purged.

To give you a little more info, in the hope that someone makes a similar product, it is a 2 part epoxy that contains a lot of solvents. It must be thouroughley mixed and then left to sit for half an hour. The mixed epoxy, if not all used can be put in a sealed container (seal does not have to be that great), and will keep in a fridge for many days. It is great stuff. If they have stopped making it we will really miss it.

When used on MDF the first coat totally disapears, the second coat will form a bit of a surface coat in patches, and most of the third coat will remain on the surface.

Hope this helps.

Transformer