Do you suffer backache?
over reach to seal areas difficult to access?
Do you need to purchase/hire scaffolds or ladders?
Do you have the 'mountain'
of paperwork, relating to the health and safety of using the above equipment?
If you answered yes to any/all the above - You need a Long Reach Sealant Gun.
long term, What are your costs for the above equipment? - What is the long term effect on back strain/injury?
Really is a 'no brainer' product.