How do I clean off excessive Black Butyl Mastic sealant from around a Caravan Window which is on white alumini


If it is definately Butyl Mastic then scrape off as much as you can, then clean up the residue with Mineral Turps or White Spirit. If the sealant has already dried off it may be more difficult to remove however these solvents should still help soften it.

Topics: Sealants