Lawn Soaker - 2 Litre. The premium hydration solution — lawn wetting agent. Water penetration can often be an issue with lawns, with essential moisture failing to reach down to the roots of the plants and therefore impeding healthy growth. This wetting agent was specifically created for use on lawns - it comes ready-to-use and will ensure that dry spots don't form. The pack supplied is enough to treat 150spm of lawn.