Filling cracks with resin

Can you fill small cracks with just marine resin only? these cracks are in plywood, not structural and are more for aesthetics before paint is applied.

 

There are cracks and then there are cracks. Could you maybe post a photo? Plywood that is coated with various resins can "check" which might be what you're talking about. How do you know the cracking is not caused by structural forces? Plywood expands and contracts as does all wood. I've always covered ply with at least a layer of 4 ounce fiberglass cloth in order to eliminate the possibility of cracking or checking.

 

Thanks for the reply, these are small, no more than 1/8" wide, not in contact with water. I'm not near the boat or I would post a picture.

 

Welcome to the Forum IB.

In the absence of any photos, what type and size is your boat please?
And whereabouts on the boat are they? How many approximately?
Are they just localised in one area, or randomly spread about?
You mention that they are no more than 1/8" wide - but that sounds pretty wide to me really, for a crack.

 

What do you mean by "marine resin" ?

 

Type of wood, location, cause of the crack, condition of the wood, what you are expecting from the repair, etc, all need to be answered before any recommendation can be made.

 

A pretty general question, so to answer it, generally, you’d use a thickened resin compound as a crack filler.