A1 ATP Powder
A1 ATP Powder is a volume thickener. This allows the A1 to be thickened to filler thickness. Thicken the A1 with ATP Powder; with this A1 can be thickened to filler thickness. The ATP Powder can be added indefinitely, until the desired thickness is reached. This does, however, result in a less strong product when a large amount of ATP Powder is added. ATP Powder can only be used for indoor applications.
The application of A1 with ATP Powder goes well with for example spatula, palette, putty knife etc.
After drying you can if desired with waterproof abrasive pads or waterproof sandpaper further refine to an even smoother whole.