UZIN PE 481 2-Component Epoxy DPM/ Primer

For screeds with extremely high residual construction moisture or rising damp, UZIN PE 481 is a high-performance two-component epoxy damp-proof membrane. It can be applied to damp cementitious screeds with moisture levels up to 99.9% relative humidity (RH), effectively forming a strong barrier before any subsequent flooring installation. UZIN PE 481 DPM is suitable for use on cementitious screeds or concrete subfloors with high residual moisture or without an effective structural damp-proof membrane (DPM).

UZIN PE 481 is a two-part epoxy damp-proof membrane and primer that works on concrete, sand and cement screeds, and other subfloors. It is ideal for areas without a structural damp proof membrane (DPM) or where rising damp and high moisture levels occur, offering protection against up to 99.9% relative humidity (RH) on cement screeds.

UZIN PE 481 DPM offers a single-coat application, saving time and labour compared to systems that require multiple coats. Its strong ability creates a durable moisture barrier for a variety of surfaces, including both absorbent and non-absorbent ones, providing flexibility for different flooring projects.

Unlike many damp-proof membranes, UZIN PE 481 DPM is designed as a one-coat epoxy DPM system, helping reduce labour time and installation stages compared with systems that require two coats.

UZIN PE 481 enables effective damp proofing over cementitious screeds with moisture levels of up to 99.9% relative humidity (RH). It dries quickly, curing in approximately 6 hours under suitable conditions. UZIN PE 481 DPM can be applied to concrete, sand and cement screeds. Its solvent-free formulation allows it to function as a primer or consolidating treatment for weak or porous surfaces.

Under typical site conditions, a one-coat damp-proof membrane such as UZIN PE 481 typically cures in around 6 hours. Its single-coat application helps reduce labour, material use and installation time compared with systems requiring multiple coats, allowing subsequent flooring work to begin sooner. Drying and curing times can vary with temperature, humidity, substrate condition, and ventilation.

A weak, porous, dusty, or lightly cracked screed should first be assessed to confirm it is suitable for renovation. Remove loose, friable material, surface contamination, laitance, dust, and poorly bonded residues until a clean, sound base is achieved. UZIN PE 481 can then be used as a consolidating epoxy primer. Its low-viscosity formulation helps bind weak screeds and reinforce the substrate. This creates a more stable, cohesive base for the next stage of the installation, such as applying a smoothing compound, adhesive, or floor covering.

Yes, UZIN PE 481 damp proof membrane can be applied to both new and existing screeds, including concrete and damp cementitious subfloors, as long as they are clean and free from contaminants. UZIN PE 481 DPM can be used for damp-proofing screeds with moisture readings of up to 99.9% relative humidity (RH) and typically cures within 6 hours under suitable site conditions. As a solvent-free epoxy damp proof membrane, it can also function as a primer, helping consolidate weak or porous substrates. It is essential to assess and appropriately prepare any weak, porous, or cracked substrates before application.