High-elongation Two-component Polyurethane Coating For Crack-bridging

Advantages for Bathroom

1. High film elasticity: High tensile strength and elongation, resists thermal expansion‑contraction and micro‑cracks of substrate, prevents water‑leakage caused by floor slight deformation.
2. Seamless waterproofing: Reactive liquid‑formed film fully covers corners, pipe roots and floor drains without joints, reduces leakage risk at high‑risk positions.
3. Strong adhesion: Firm bonding to cement‑mortar substrate, less hollowing, blistering and delamination.
4. Long‑term water immersion resistance: Stable performance under long‑time soaking, ideal for shower area waterproofing.
5. Mildew & corrosion resistance: Adapt to hot‑humid bathroom environment, resist sewage corrosion.
6. Excellent water‑pressure resistance: Dense film with strong impermeability to stop water seepage to lower floors.
7. Good for detail treatment: Extra‑thick coating around pipe roots and floor drains to reinforce high‑leakage‑risk zones.
8. High mechanical strength: Cured rubber‑like film resists impact, hard to damage during tile‑laying work.

Application Method for Bathroom

1. Substrate preparation: Keep bathroom floor & wall solid and flat. Remove dust, oil and loose mortar. Plug holes and repair cracks. Keep substrate dry without standing water.
2. Detail reinforcement: Apply 1‑2 coats of two‑component polyurethane as extra layer for pipe roots, floor drains and corners, width ≥250mm per side. Proceed to main‑area construction after drying.
3. Proportion & mixing: Weigh component A and B strictly by weight ratio. Electrically stir for 3‑5 minutes until uniform without particles. Use mixed material within pot‑life, do not dilute with water.
4. Multi‑layer trowel application: Apply thin coats repeatedly; single heavy coat is forbidden. Apply next coat after previous coat dries, brush in cross directions. Total film thickness for floor ≥1.5mm; shower‑zone wall height ≥1.8m, other walls ≥300mm.
5. Curing: Natural full curing. Forbid treading and water contact during curing period.
6. Water‑storage test: Carry out 24‑48 hours water‑storage test after full curing. Pass test if no leakage downstairs.
7. Protective layer & tile work: Apply cement‑mortar protective layer after qualified water test, then lay ceramic tiles.