Watertite DampSeal Primer is an advanced interior–exterior waterproofing primer that seals porous plaster, resists seepage and greatly improves paint durability on damp‑prone walls. It uses a special nano‑technology emulsion to block water ingress, keeping walls damp‑free and salt‑free for long periods while forming a strong bonding layer for subsequent putty and topcoat.

The primer delivers up to 3 bars water‑penetration resistance on vertical surfaces and 5 bars on horizontal surfaces (tested as per DIN 1048), giving around 7× better waterproofing than ordinary primers. It is applied by brush or roller, recoatable in 2–4 hours, with coverage of roughly 50 sq.ft/litre on horizontal and 120 sq.ft/litre on vertical areas, and is available in 1 L, 4 L and 20 L packs for site convenience.