No! It is important you use the appropriate thinner as specified by us. The use of any ordinairy thinner can lead to problems with your paint prodcuts. Good examples are bad drying/curing, loss of gloss, blistering, shorter potlife and so on. For our one-component Universal Primer, Antislip Deckpaint, Super Gloss and varnishes you use AK Thinner, for Polygrond you use PU Brush Thinner, for Epoxy MP Coating you use EP Brush Thinner and for our Antifouling and Bottomcoat CR Extra ypu use CR Thinner.