ProofBase Primer is the perfect preparation coat for all surfaces prior to the application of ProofTherm Insulating render or plaster both externally and internally. It is a 100% natural mineral product containing zero VOC’s. ProofBase controls suction and provides an ideal adhesive key for optimum results in all rendering jobs. Its vapour permeable formulation allows the substrate to breathe and works in conjunction with ProofTherm Insulating Render/Plaster to maintain a healthy, damp free internal environment. Features of ProofBase Universal Primer Mineral primer Ideal for all surfaces Easy to apply using a roller or brush Maximises the effectiveness and durability of ProofShield external wall insulation system and ProofShield Internal Wall insulation system Breathable and safe to use Rapid drying Specifications Size: 15LCoverage: 125m2