How deep a repair can it fill?
To any depth in one pass, because it chemically cures all the way through rather than drying from the surface. That is its main advantage over a ready-mixed filler.
How long before I can sand it?
About 30 minutes. Once set it can also be drilled, nailed, planed and carved, so it is ideal for shaping repairs to mouldings and sills.
Is it waterproof and suitable for outside?
Yes, it is waterproof and rated for internal and external repairs, including wet rot damage.
Do I have to mix it?
Yes. It is a two-part filler, so mix the resin with the correct amount of hardener. Only mix what you can use within a few minutes, as it cures fast.
Will it crack or shrink?
No. It has good movement capability to flex with the wood and does not shrink or crack.
When should I use the 1 Part filler instead?
For small nail and screw holes or light surface filling, the ready-mixed 1 Part Wood Filler is faster and comes in more shades. Use the 2 Part for deep, strong or structural repairs.