Sika shield primer wb-30in

What It Is SikaShield® Primer W-30 IN is a water-based bituminous primer designed to prep and activate surfaces before applying bituminous waterproofing membranes (like APP or SBS sheets). It's basically a bonding primer that helps the waterproofing layer stick better to the substrate. 🔎 Key Features Water-based, modified bituminous primer — easier and safer to use than solvent-based ones. Penetrates porous and cementitious surfaces to improve adhesion for waterproofing membranes. Works well on concrete, screed mortar, porous stone, lime-concrete, and old bituminous surfaces. Can be applied with a brush, roller, or spray. Designed for tropical conditions — good for hotter, humid environments. 🛠 Typical Application Surface prep: Clean, dry, and free of oil/grease; remove loose particles. Dilution: Mix with clean water (typically 20–50%) to get the right consistency. Apply: One coat by brush, roller, or spray. Let it dry (touch dry in a few hours, fully dry ~4–6 hours). Membrane install: Install waterproofing sheet within ~24 hours of priming. 📦 Product Details Base: Bitumen + water + additives. Colour: Black or brown pasty liquid. Packaging: Typically ~20 kg metal drum. Shelf life: ~12 months if stored sealed at ~+20 °C to +35 °C. 📊 Why Use It If you're laying torch-on or self-adhesive bituminous membranes, this primer helps ensure you get good, durable adhesion and avoids delamination or early failure of the waterproofing laye