“Winkler One” is the first and only liquid roof coating in the world that can be applied on wet surfaces and extreme temperatures
(from 32° to 104° F).

Solvent free, no need for primer, breathable and rainproof after only 2 hours at 68° F and 5 hours at 32° F.
A revolution for the roofing industry. 100% Made in Italy.

1st Waterproofing Liquid Membrane for Wet Surfaces

Thanks to this innovative liquid membrane, worldwide roofers can finally work on humid or wet surfaces, at 32° F or even 104° F.


We'll answer you within 12 hours


ONE is a single component colored liquid waterproofing for roof membrane, specifically developed for applications under extreme conditions. Infact we sell this product from Canada to Arab Emirates providing to the customer a solution in any wheater conditions, doesn’t matter if the substrate is wet, thanks to its formula, ONE is able to evaporate the water also after the painting. It is a fast curing product that resist at high and low temperature remaining stable at thermal shocks. It tolerates precipitations in a short period of time after its application. Although not fully cured, the product is rain-proofed and after few hours from its application it is completely out of rain. The need of new products and solutions is detected and studied by the R&D personal, mainly trough a direct team work on the building sites.
  • Ready to use
  • Long Pot Life
  • VOC Zero
  • No Primer Needed
  • UV Rays
  • Water stagnation
  • Applicable on Metal
  • Applicable in wet condition
  • Applicable in extreme conditions
    (0ºC or 32ºF and rising)

It can be applied with:

Flat trowel
Short haired roller
Airless spray gun

It can be used on:

Flat roofs
Metal roofs recover
Balconies or decks
Areas with moisture damages, including those with foot traffic
Green concrete (cured at least 7 days at minimum +15ºC - 59°F)
Concrete blocks
Fibered-cement boards
Ceramic tiled surfaces
Asphalt shingles
BUR cap sheets or modified bituminous membranes (oxidized minimum 180 days if smooth)

Clean all substrate surfaces thoroughly to eliminate dirt, dust, and loose materials, any form of oil or grease and foreign or bonding-proof matters. There is no need for the substrate surface to be dry, but ponding water shall be removed prior to the application of ONE. After thoroughly cleaning the surface to be treated, apply ONE (with a consumption of 0.70 gallons/sq.ft. - 400 g / m²) evenly. Immediately lay ONE MAT (90g/m² non-woven reinforcement), by using a spiked roller, and drown it with other 1.23-1.58 gallons/sq.ft.(700-900 g/m²) of ONE. The use of the bubble-breaker roller after the application of the second coat is always recommended. Wait for the time required for the application of the 2nd coat (see temperature table) and complete the application with the remaining 1.05-1.23 gallons/sq.ft.(600-700 g/m²) provided.

2.98-3.35 gallons/sq.ft. (1.7-1.9 kg/m²) in two coats, with ONE MAT interposed.


1 kg pail – 1 box = 15 pcs 5 – 20 Kg pail


White- Grey- Red- Terracotta


The product in its undamaged packaging can be store for 12 months. No frost-proof. Store at temperatures between +5°C e +35°C.

DO NOT dilute
Not frost-proof
Apply BC SEAL BAND (Self-Adhesive Butyl Tape) at wall to floor type corners, balcony terminations, around skylights or other alike penetrations.
Use BC SEAL PAD (Self-Adhesive Butyl Square Pad) around tubes, vent pipes, drains, etc. In case the substrate is damp, first apply a skim coat of ONE, prior to the application of any butyl accessory.
After the product dries, resume the normal application of the butyl accessories. Control cuts, contraction and/or most structural joints will be sealed, using the waterproofing elastic band WINJOINT BAND as follow:
Ensure the surface to be treated is clean.
Over the clean substrate apply ONE in two stripes 5 cm wide along each side of the joint, without covering the joint line.
Immediately place WINJOINT BAND over the wet stripes of ONE (the central part of the band will cover the joint line and the lateral wings of the band will be embedded onto the wet stripes of ONE.
After the product dries, cover the lateral wings of the WINJOINT BAND with a skim film of ONE.


Want more information? Fill out the form
We'll answer you within 12 hours

    NAME *
    E-MAIL *