The versatility of the SEMCO Liquid Membrane is unmatched. The SEMCO Liquid Membrane is PREP - SEALER - COATING all in ONE. No additional primer or sealer is needed. Here are some examples perfect for SEMCO Liquid Membrane:Primary waterproofing on drywall / hardiebacker boards / MDF boards . You can apply thin set for tiles over it without any problem.Waterproof your metal roof and prevent it from rusting by applying Liquid Membrane over metal surfaces exposed to weatherWaterproofing roof shingles Application on wood or wooden decks to extend their lifespanWaterproof your pond or fish tank since SEMCO Liquid Membrane is safe for fishProtect your planters and yes, SEMCO Liquid Membrane is plant produce safeRV roofsWaterproof concrete or fiberglass poolsWaterproof flat roofs, roof shingles or Balconies Crack prevention