Thank you for a very good question. Builder’s Bog is based on Polyester resin. The polyester curing reaction is inhibited by contact with air, therefore we put in an additive which excludes air from the outer surface as it cures. This additive must be removed by sanding, scratching, roughening etc for a perfect bond between layers.Successive wet-on wet applications are not a problem, because the “waxy” surface only forms after curing.
If the surface is hard to reach for sanding, I would attack it with a chisel, broken drill bit, rotary burr or similar in order to expose a bit of the under-surface for a good bond between layers. As you can see this is a good question, well worth asking!
Regards,
Stuart Jordan
Managing Director
Chemical Specialties Ltd.
20.9.2016
Thank you for a very good question. Builder’s Bog is based on Polyester resin. The polyester curing reaction is inhibited by contact with air, therefore we put in an additive which excludes air from the outer surface as it cures. This additive must be removed by sanding, scratching, roughening etc for a perfect bond between layers.Successive wet-on wet applications are not a problem, because the “waxy” surface only forms after curing.
If the surface is hard to reach for sanding, I would attack it with a chisel, broken drill bit, rotary burr or similar in order to expose a bit of the under-surface for a good bond between layers. As you can see this is a good question, well worth asking!
Regards,
Stuart Jordan
Managing Director
Chemical Specialties Ltd.
20.9.2016