unless it has been reformulated, HD Cleanse can be a bear to remove. when i hv used it, i found it best to remove very quickly. i would test a small area before committing to this cleanser. i found it best to apply by hand.
the 12 oz sealant will last a very long time. it is my favorite sealant and i also use it inside the house (shower, etc). easy to use and unbelievable durability. the interior sealant is also impressive.