|
Group: Forum Members
Posts: 592,
Visits: 1.9K
|
You can not change the ratio of hardener to resin without affecting the properties of the resulting epoxy matrix in your part .. It is a chemical reaction that takes place between to reagents - they need to be in precise proportion to create the chemical bonds between the correct number on molecules to achieve the properties that you want .. Epoxy hardener is not an "accelerant" or "catalyst" like the MEKP in polyesters.
Stick to to correct ratios as closely as at all possible ..
To be able to brush in a gelcoat, use some fumed silica in the "top layer" or a specific Gelcoat . With the High temp Epoxy from EC, I have always used vacuum bagging with no attempt at "gelcoating", then added several layers of either 2k clearcoat or High temp Epoxy to the part, after having very lightly keyed the surface, and cleaned it with acetone. I've had very nice cosmetic results with this tech- For parts that must live out in the sunlight, I've always used high temp clear coat .. I have made exhaust end cans /covers that have lasted years without any UV damage or yellowing.
"Sapere Aude"... Dare to KNOW!
The written word is the only truly efficient vehicle for transmitting a complex concept from mind to mind...
103% of all people do not understand statistics...
Do not adjust our mind, theres a fault in reality :-)
|