Synwood is a new material with properties somewhere between ceramic and resin. It has a silicate bonding system. Its mixing and setting characteristics are more like resins than cementitious materials, though easier and cleaner to work with. It is difficult to characterise the physical properties of the material, because it tends to take on the properties of the filler.
The most important property is cost, which is way below resin costs, and thereby opens a vast field from which composites have previously been excluded because of costs.
The material is supplied as powder and resin, to which you add filler. Typically you use 60 weight parts resin to 40 weight parts powder and add an equal volume of filler to volume of resin-powder mix.
Lightweight fillers are favoured because you can get excellent strength to density ratios. Synwood is normally sold with a perlite filler. You can order Synwood base and add your own filler. Wood chips and sawdust are ideal because they are almost zero cost, and the resultant product is similar to wood, which is becoming unaffordably expensive for many traditional applications. Wood expands powerfully when it absorbs water, and shriks as it dries. Your sawdust should therefore not be added completely wet or dry. What you get is a product that resembles wood, at low cost, cast directly into its final shape with no wastage and no machining and no joining. There are few limitations on design. Because it is moulded, ornate designs are no extra cost. examples of applications are; Binder for chipboard which has good water resistance, better fire resistance, lower cost.
Kitchen cupboard doors and drawers
Perlite is a good lightweight filler. Materials made from it are totally inorganic, fireproof, can float on water for 3 months.
Silica or ceramic grog as filler gives properties similar to fired ceramic. Clay may be added as a filler, but will not make it plastic.
Polystyrene regrinds are a cheap ultralight bulking filler.
Surface treated polypropylene fibres can be added,0,2% to lightweight formulations to reinforce them. They can be cracked, but are difficult to break. Open weave fibreglass "scrim" can be added as reinforcement.
Pigments work well since the opacity is low.
Surface texture is easily produced. Silicone or Multimould makes ideal moulds.
The resin is strongly alkaline and will make your hands rough, the same as working with portland cement. Use hand cream after working it by hand. The material is not toxic or hazardous. Shelf life is unlimited.
Water may be added to all mixes, but the resulting strength and hardness will decrease.
The surface of castings develops higher strength and hardness than the centre.
All consistencies can be made, from pourable to stiff pressing materials. A pourable variant is called "Kerafire" and a sculpting variant is called "Mastercarve". A low strength, low cost variant is caller "Rapolite".
All variants are very easily cut, carved, machined or sanded. The finished surface can be hardened with "Fireproof Paint."