No Hydro Damp Proof Cream DPC ​is a high-strength damp proofing cream, with high active ingredients, ready-to-use silane/siloxane damp proof injection cream that has been designed to create an effective barrier against rising damp in existing buildings. No Hydro high strength damp proofing cream is injected into the mortar course between the brick course via 12mm holes created to treat affected walls. No Hydro Damp Proof Injection is extremely easy to apply and does not require much technical knowledge or experience.