QA Certificate
Certificate type
External “Type A” Basement waterproofing system with polymer-modified thick film bituminous membrane.
Bituminous thick film waterproof membrane, providing a thick, crack-bridging, waterproofing to external basement slabs, walls and lids. On clean, solid, stable, gypsum free mineral substrates KÖSTER Polysil TG 500 is applied as a primer. This immobilizes salts present in the substrate and the substrate is solidified. When preparing to waterproof on top of old bituminous coatings KÖSTER Bitumen Primer is used. To prevent stresses in the waterproofing, rounded fillets are installed in the wall/floor junctions.
The actual area waterproofing is achieved using KÖSTER Deuxan 2C in two layers. KÖSTER Deuxan 2C can be trowel or spray applied. KÖSTER Glass Fibre Mesh is embedded into the fresh first coat in all crack endangered areas - these areas include, but are not limited to, all joints, junctions, changes in direction, areas of previous cracking, horizontal decks and walls constructed with ICF. Before backfilling the waterproofing should be protected from mechanical damage and settling with below grade insulation boards, protection boards, or 3 layer drainage sheet.
System Components:
| Product Reference | Koster Deuxan 2C - Bitumen Based Waterproofing System |
| Primer | KÖSTER Bitumen PrimerUse when preparing to waterproof onto old bituminous coatings. KÖSTER Polysil® TG 500Use on clean, solid, stable, gypsum free mineral substrates. |
| Fillet | KÖSTER Repair Mortar PlusUse to reinforce all internal angles with a rounded concave fillet. |
| Waterproofing layer | KÖSTER Deuxan® 2C |
| Product Options | Waterproofing layer: - KÖSTER Deuxan® 2C: Two-component, compression-proof, elastic, polymer modified, fibrated bitumen thick film sealant for safe waterproofing of buildings in accordance with BS 8102:2009. Resistant to pressurized water, approved by the building authorities. Radon proof. Suitable for trowel or spray application. |