Daniel Smith Watercolour Masking Fluid is easy to use with the bottle applicator and 5 applicator tips are included. Daniel Smith Masking Fluid makes an impervious barrier to protect your watercolour paper and preserve the white areas by blocking watercolour washes from flowing into areas you don't want leaving crisp, clean edges. 30ml Bottle DANIEL SMITH Masking Fluid does not need shaking because latex mixture does not easily separate Keep Masking Fluid upside down in a small glass when working with the Masking Fluid in between actually applying it. That way if there are any bubbles, they remain at the top and don’t get into the applicator needles. Be sure to thoroughly rinse out the applicator tip immediately after using to prevent clogging when it dries. You can also use a paint brush instead of the 5 tips that come with the Masking Fluid. Do not use your good brushes because all brushes will eventually get clogged up with dried Masking Fluid. To remove Masking Fluid, use a Rubber Cement Pick up
