UPA Base Coat 45 is a plaster-based adhesive used in the jointing of plasterboard. Joints are bedded in Base Coat 45 with tape and then a second coating is applied. Joints are then finished with topping of a
finishing coat and smoothly sanded before painting. For best results, UPA recommends the use of Base Coat 45 with all other plaster cement and adhesive products available within the UPA product range.

Application
The UPA Base Coat can be specially formulated to suit either 45 , 60 or 90 minute setting times as required.
1) Bedding Coat
- For fiberglass tape, affix tape to joint and apply mixture to the joint recess.
- For paper tape, fill joint recesses evenly with mixture, apply UPA tape firmly and centrally to the filled joints and apply a skim coat of mixture over UPA tape.
- Also apply mixture to taped butt joints and internal corner angles.
- Apply mixture to all UPA metals external angles, fastener heads and recessed.
- Allow mixture to set before applying second coating.

2)Second Coat
- Apply a second coat of UPA Base Coat 45 to filled recessed joints, butt joints, internal and external angles, fastener heads and other filled recessed.
- Trowel out all edges to remove any excess bedding material.
- Allow mixture to act for at least one hour before applying finishing coat.